Searching for Christmas PCB will only leave you looking at endless results of Christmas trees with led's in different fashion but wait....... Look at my design of a unique and useful Christmas Clock which is an actual functioning hour clock with 12 led's and a buzzer for every hourly alert. Its Beautiful and suits the purpose of a Christmas decoration as well as suits it's purpose as a clock.The following design is made under the idea of creating a unique Christmas decorative board which will suit a purpose as an electronic gadget too. This can be used as a creative Christmas wall art as well as a clock .In this case ,I have designed a Board with "Rein deer" theme :):):)MERRY CHRISTMAS FOLKS :):)

What is your project?At present humanity is knocked down by virus called COVID19, to avoid its contagion the World Health Organization among multiple precautions recommends a social distancing of at least 1 meter (3 feet) of distance between you and other people [1]. As an alternative to help solve this problem, develop lenses with a distance ultrasound sensor, with an indicator (LED) that gives a visual alert to get away from people.Why did you decide to do it?From my point of view this is a contribution to study and validation of the recommendations that WHO tells us to avoid the spread of COVID-19, additionally it trains us with a light alert a social approach in times of pandemic. How does it work?The lens has an HC-SR04 [2] ultrasonic sensor specially designed for distance measurement, among many alternatives it was chosen for its low price and low power consumption, all controlled by the Atmega 328p microcontroller and programmed with the Arduino IDE, the idea is a very economic development and easy to build since communities can adapt the majority of current lenses to the detection and alert system.The system has an integrated battery charge sensor that can optionally include the code to emit a low battery alert.To develop a robust code that performs 2 measurements and a comparison with the previous measurement (to avoid false alarms) before making an alert decision and thus make the decision to activate or not the light alert.Thank you very much for the opportunity, if you want to help me financially to develop the next improved version I would really appreciate it.Rt120474@hotmail.com[1] https://www.who.int/es/emergencies/diseases/novel-coronavirus-2019/advice-for-public[2] https://cdn.sparkfun.com/datasheets/Sensors/Proximity/HCSR04.pdf?Cuál es su proyecto?En la actualidad la humanidad esta abatida por virus llamado COVID19, para evitar su contagio la Organización Mundial de la Salud entre múltiples precauciones recomienda un distanciamiento social de al menos 1 metro (3 pies) de distancia entre usted y las demás personas [1]. Como una alternativa para ayudar a resolver este problema desarrolle unos lentes con un sensor de ultrasonido de distancia, con un indicador (LED) que da una alerta visual para alejarse de la personas.?Por qué decidió hacerlo?Desde mi punto de vita esta es un contribución para estudio y validación de las recomendaciones que OMS nos dice para evitar el contagio del COVID-19, adicionalmente nos entrena con una alerta lumínica un acercamiento social en tiempos de pandemia. ?Cómo funciona?El lente tiene un sensor ultrasónico HC-SR04 [2] especialmente dise?ado para la medición de distancia, entre múltiples alternativas se escogió por su bajo precio y bajo consumo eléctrico, todo controlado por el microcontrolador Atmega 328p y programado con el IDE de Arduino, la idea es un desarrollo muy económico y fácil de construir ya que las comunidades pueden adaptar la mayorías de lentes actuales al sistema de detección y alerta.El sistema tiene integrado un sensor de carga de batería que opcionalmente se puede incluir el código para emitir un alerte de baja batería.Para desarrollo un código robusto que realiza antes de tomar una decisión de alerta 2 mediciones y una comparación con la medida anterior (para evitar falsas alarmas) y así tomar la decisión de activar o no la alerta lumínica. Muchas gracias por la oportunidad, si desean ayudarme económicamente para desarrollar la siguiente versión mejorada mucho se lo agradecería.Rt120474@hotmail.com

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This is 400 watts stereo audio amplifier board. this project can play upto 2 X 200 watts speaker easily.i used two 2SC5200 & two 2SA1943 Transistors and 45-0-45 transformer for this projectMaterials for the Project2 pcs. 33 Ohm Resistance2 pcs. 68K Resistance 3 pcs. 10K Resistance2 pcs. 1K Resistance4 pcs. 33K Resistance6 pcs. 150 Ohm Resistance4 pcs. 3.3K Resistance8 pcs. 2.2 Ohm 1/2 Watts Resistance4 pcs. 4.7K 1 Watts Resistance4 pcs. 100 Ohm 1 Watts Resistance2 pcs. 10 Ohm 2 Watts Resistance8 pcs. 0.33 Ohm 5 Watts Resistance2 pcs. 10 Ohm 5 Watts Resistance1 pcs. 47K Potentiometer1 pcs. 10XB60 Bridge Rectifier6 pcs. 4007 Diode2 pcs. 24 Volt zener diode4 pcs. 470pf Capacitor4 pcs. 100pf Capacitor4 pcs. 47uf100v Capacitor2 pcs. 6800uf80v Capacitor2 pcs. 100Kpf Capacitor2 pcs. 470Kpf Capacitor4 pcs. C2229 Transistor4 pcs. 2N5401 Transistor4 pcs. 2SC5200 Transistor4 pcs. 2SA1943 Transistor2 pcs. C1815 Transistor2 pcs. C5198 Transistor2 pcs. A1941 Transistor2 pcs. TIP42C Transistor2 pcs. 6uH coilif you want to make this project please watch the video carefully

### DESCRIPTIONPCB for PETlng 122mm / d33mm for iSpindel project (electronic Hydrometer)https://github.com/universam1/iSpindel/blob/master/docs/README_en.md### TECHNICAL DETAILS / COMPONENTS- 1 Plastic cylinder( http://www.geoshop.lt/index.php?route=product/product&path=20_26&product_id=285#.WoBTg-jOXIU )- 1 resistor 4k7ohm- 1 resistor 220kohm- 1 diode BAT43- 1 Wemos D1 mini v3 (compatible asl v2 or v1 model, but usb is close with the pcb)- 1 Gy-521 Gyro & Acceleration Sensor (MPU-6050- 1 Temperature Sensor (DS18B20)- 1 TP4056 Lipo Charger micro USB 6 pin with protection circuit- 1 microswitch SK12D07VG3( https://www.pcbway.com/project/shareproject/publish.aspx?orderid=438558 )### LEARN / TOPIC / BUILD INSTRUCTIONSFor assembly see silkscreen on both layer.Please mount only male pins, while to fix the battery need solder on short iron on both polesAssembly instructions: https://www.dropbox.com/s/5lwl436oonqsmnx/iSpindel%20PCB_assembly.pdf?dl=0Cheers!!!CherryPhilip

Since ,Pcbway is conducting a Christmas PCB design Contest...so I decided to participate in the contest too :).But the thing is ,topic is christmas and there are not much options available to christmas designs.All you can see in google is "A santa","Christmas tree with Leds" and "Sleigh" in some cases.So i decided go 'out of the box' and designed something that is never done before.Hope you all like it.This is a christmas themed 12 led Arduino nano creative board . 5-12v Dc power jack is provided for supply. Code according to your pattern :). Merry Christmas!!The following design is made under the idea of creating a unique christmas decorative board. This can be used as a creative christmas wall art .In this case ,i have designed a Board with "Rein deer (Prancer and vixen)" theme :)I have not made the Pcb board for it ,since in india here ,there are no perfect manufacturers for making pcb and when i tried to send it to PCBWAY the pcb cost was low ,but the shipment charge was not pocket friendly :)

RASPBERRY Pi1541 ZERO HAT COMMODORE-64 DISK DRIVE EMULATORHello,This is a Pi1541 Hat for Rasberry Pi Zero, I built the circuit and tested it with a Raspberry Pi Zero, it works fine.Pi1541 is a real-time, cycle exact, Commodore 1541 disk drive emulator. You can load and save commodore64 programs, D64 .PRG ... extensions games/software from a Micro SD card, it is an alternative to SD2iEC, please look at the Documentation link.The source page link of this PCB drawing is below. (Option A) https://cbm-pi1541.firebaseapp.com/It should also work with other suitable Raspberry Pi models listed at the source page.Oled display pin order is more compatible now with PCB rev v1.2Do not forget: solder 2 x 20 pin female header before OLED display :)Thanks to Stephen WhitePS: If you need EPYX FASTLOAD CARTRIDGE, you can find it from this link.https://www.pcbway.com/project/shareproject/C64_EPYX_FASTLOAD_CARTRIDGE_1.htmlGERBERS CHANGED: PCB REV V1.2 (01.07.2020)Two different position and pin order for Oled screen.Both Oled screen GND and VCC connections can be Reversed, by cutting J1 - J2 and shorting J3 - J4Better dimensions, more compatible to Raspberry PiZeroGERBERS CHANGED: PCB REV V1.2 (27.08.2020) (Alternative power pins -PWR+ is corrected as +PWR-. Thanks to Jani)3D Case designed by Cem Tezcan (Many thanks) (tested with first rev. PCB)https://www.thingiverse.com/thing:4550955In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Ps. While transfering data (reading or writing) from SD cards it should not be interrupted like power-off or Reset systems. Otherwise that may damage SD cards.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.

Very easy to build, small, internal, speed is 400-720kb/sec, able to mount OFS/FFS/fat95/...any? partitionsNo autoboot, but it is working on a stock A500 (1.3 kickrom without fastram)!Original schematic: http://www.mkl211015.altervista.org/ide/a500ide.htmlDH0:Device = ide.deviceFileSystem = l:fat95Unit = 0Flags = 0LowCyl = 0 HighCyl = 0Surfaces = 1BlocksPerTrack = 1BlockSize = 512Reserved = 0Interleave = 0BootPri = 0Buffers = 10BufMemType = 1StackSize = 4096Priority = 5GlobVec = -1DosType = 0x46415401#Components:2pcs Male pin 2.54mm Header Socket Row Strip ( IDE pins)2pcs 40Pin (2x32pin) 2.54mm Single Row Round Female Pin Header Socket (CPU socket+pins)1pc 100uF capacitor2pcs 0.33uF capacitor 1pc 74F00 TTL chip1pc 74HCT688 TTL chip1ps SIP-9 100K Ohm Resistors Array

This version of the Pinguino board is built with a Pic 18F2550 The characteristics of this board are: · 18 digital input/output with 5 shared analog inputs,· UART for serial communications,· 2 fast PWM outputs ( 3000 Hz ),· 5 analog inputs. There is one switch to reset the board. When reset is held, the board is in bootloader mode waiting for an upload from the development computer for 5 seconds. After 5 seconds, the current program is run. This board can be powered by :· USB Connector· Jack Connector ( 7V - 20V)· External 5V Power SupplyI CAN SOLDERHOW TO PROGRAM THE BOARDTo program the board for projects We use The pinguino IDE and Arduino language, Open SourceSCHEMATIC DIAGRAMPRESENTATION & TESTING

Chip solution Battery power management chip IP5328P (C188809)Welding method is used for the battery port, and the pad is increased to ensure excessive current.Lithium battery protection uses Seiko S8261, 3.08v threshold protection chip.mos selects IRF7831 low internal resistance.2 USB A port output1 USB B port input1 USB C port input/outputAny port supports fast chargingThe battery charging current can reach up to 5.0AAdaptive charging current adjustmentSupport 4.20V, 4.35V, 4.40V, 4.50V batteries (resistance configuration)IP5328P is an integrated QC2.0 / QC3.0 output fast charging protocol, FCP/AFC/SFCP input and output fast charging protocol, MTK PE+ 1.1&2.0 output fast charging protocol,USB C/PD2.0/PD3.0 input and output protocol, USB CPD3.0 PPS output protocol, compatible with BC1.2/Apple/Samsung mobile phone, synchronous step-up/step-down converter,Lithium battery charge management, battery power indication and other multi-functional power management SOCs provide a complete power solution for fast charging mobile power.It can support four USB ports of USB A x2, USB B, and USB C at the same time. Any single USB port can support fast charging. When two or more output ports are used at the same time, only 5V is supported.The high integration and rich functions of IP5328P require only one inductor to realize the step-down and step-up functions. In application, only a few peripheral devices are needed, which effectively reduces the size of the overall solution and reduces the BOM cost.The IP5328P's synchronous switching boost system can provide a maximum output capacity of 18W. Even if the battery voltage is low, the output of 18W can still maintain more than 90% efficiency. When no load, it will automatically enter the sleep state.IP5328P's synchronous switch charging system provides charging current up to 5.0A. Built-in IC temperature, battery temperature and input voltage control loop to intelligently adjust the charging current.IP5328P has built-in USB C&PD2.0/PD3.0 protocol.IP5328P has a built-in 14bit ADC, which can accurately measure the battery voltage and current, and can access the ADC data through I2C. IP5328P has a built-in power calculation method to accurately obtain battery power information. The battery power curve can be customized to accurately display the battery power.IP5328P supports 1/2/3/4 LED power display, intelligent identification of power display mode; supports lighting function; supports buttons. Customizable functions: while charging and discharging, PD15V output, charging wearable devices and other functions.

My name is Hendra, I love embedded Project and also I love retro gaming. One of my favorite handheld console is the Gameboy and two years a go a guy named kevin bates launched a kickstarter product called Arduboy, which you can already tell from its name, it is a gameboy made from Arduino development Board. It also a fully open source console made from oshw dan open source software called Arduino (Duh) Unfortunately the Arduboy is a bit expensive to me, So I try to made my one with my scattered hardware and my basic soldering skill using a trough Hole PCB and made my first DIY ArduboyThe first Prototype was a success but still there a problem with the power because as seems on the picture above, I use 2 coin cell battery which last only 10-20 Minutes. So I Came with another prototype which use a 1000 mAh lipo battery Instead. And it runs for days in a single charge.Now I want other people enjoy the excitement that I felt with making their own handheld console by making A PCB which they can solder directly using few components.I already have two PCB models in Mind one is a vertical 1 Layer modeand other is two layer Horizontal Mode which is in the PCB Design AboveVersion 2 updated in the gerber fileCOMPONENTSThe Arduboy clone only consist of few components which are:Arduino Pro Micro6x6x6 tactile/push button0.96 SPI Oled ScreenbuzzerTP4056 battery charging moduleHeaders/JumpersBUILD INSTRUCTIONSJust put the components accordingly and solder all the parthttps://youtu.be/nAhKGUDjmbw

COMMODORE 64 - BASIC ROM & KERNAL ROM REPLACEMENT ADAPTER REV.3DESIGNED FOR 901226-01 BASIC ROM and 901227-03 KERNAL ROM REPLACEMENT.Hello,This is a tested and working circuit board.This adapter is suitable for Commodore 64 24pin Basic and Kernal ROMsREV.3 PCB is a special narrow design that allows you to use three adapters side by side on the commodore 64 motherboard.You can find and download many different ROM files for your C64, from internet. This adapter lets you to use max. 8 (8 x 8KB) different ROMs in one 27C512 eprom.The link below contains 901226-01 BASIC ROM and 901227-03 KERNAL ROM images for eproms https://archive.org/download/c64-roms/C64_ROM_BINARIES.zipThis ROM adapter table is also compatible with JiffyDOS ROM, you can buy and use JiffyDOS 64 KERNAL ROM Image http://store.go4retro.com/jiffydos-64-kernal-rom-overlay-image/ In terms of device and software security; please turn your Commodore64 off before switching ROMs.Ps. In order to use this ROM adapter, your Commodore 64's ROMs have to be desoldered and socketed.If you need 16x4KB Commodore 64 Character Generator ROM replacement adapter for replacing 901225-01, it is hereGerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.COMPONENTS:27C512 (or W27C512) (FOR 8X ROM)3 PCS 10K 1/4 WATT RESISTANCE2 PCS. 12 PIN 2.54mm ROUND MALE HEADER3 PCS 2PIN 2.54mm MALE HEADER3 PCS 2.54mm JUMPER CAP28 PIN WIDE DIP IC SOCKET 24 PIN WIDE DIP IC SOCKET (FOR C64 BOARD )And you will need an eprom programmer to program 27c512

(DIY) Pi1541 + EPYX FAST LOAD CARTRIDGE for COMMODORE 64 RASPBERRY Pi1541 ZERO HAT (C64 DISK DRIVE EMULATOR) and EPYX FAST LOAD CARTRIDGE TOGETHER.Hello,This is a tested and working project.This is an Easy DIY project, all components are through hole, marked on the PCB, Easy to solder, Easy to make ;) Actually, this PCB is a combination of two independent projects, one of them is Pi1541 (Commodore disk drive emulator) and the other is "Epyx Fast Load" Cartridge. They can be used individually or together.https://www.pcbway.com/project/shareproject/RASPBERRY_Pi1541_ZERO_HAT_COMMODORE_64_DISC_DRIVE_EMULATOR_1.htmlhttps://www.pcbway.com/project/shareproject/C64_EPYX_FASTLOAD_CARTRIDGE_1.htmlPi1541 is a real-time, cycle exact, Commodore 1541 disk drive emulator. You can load and save commodore64 programs, D64 .PRG ... extensions games/software from a Micro SD card, it is an alternative to SD2iEC, for more info please look at this link.A lot of experienced Commodore 1541, SD2iEC, Pi1541 users prefer EPYX FASTLOAD, because of its high compatibility with Commodore hardware and software. The source page link of Pi1541 PCB drawing is below. (Option A) https://cbm-pi1541.firebaseapp.com/Many thanks to Stephen White for Pi1541. You can visit his site and make a donation.Do not forget: solder 2 x 20 pin female header before OLED display :)SETTINGS FOR Pi1541 HAT DISPLAY PIN ORDER:For VCC-GND-SCL-SDA Displays; SHORT VCC + VCCFor GND-VCC-SCL-SDA Displays; SHORT GND + GNDAT THE BACK OF THIS PCB.** If you want to use Pi1541 HAT unconnected to the C64 expansion port then you need to provide DC +5V 2A power to the (+ -) pins on the PCB. (DO NOT CONNECT EXTERNAL POWER SOURCE TO THIS CARTRIDGE WHILE IT IS INSERTED TO C64 !)(Do Not use HDMI output of Raspberry Pi with this Pi1541 HAT)You can download Binary Eprom Image and user manuals of Epyx Fast Load Cartridge from this link.https://archive.org/download/epyx-fast-load-1984-v-2-roms_202005/Epyx_FastLoad_1984_v2_ROMS.zipIn order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Ps. While transfering data (reading or writing) from SD cards it should not be interrupted like power-off or Reset systems. Otherwise that may damage SD cards.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!As you can see, I have uploaded many projects and still working on new projects. If you have any questions, please search the internet for answers. Unless I explicitly stated, all my projects are tested under normal conditions and confirmed to work before being shared. I am sorry for not having enough time to answer all the questions.Have funThank you.Components for RASPBERRY Pi1541 ZERO HAT Part:Raspberry Pi Zero (Other rasberry Pi models are NOT suitable to work from C64 expansion port)6 pcs. Right-Angle Tactile Push Button4 channel. bidirectional logic level converter6 pin Male DIN Connector0.96 inch Oled screen2x20 pin female header470 ohm 1/4watt RESISTANCE (value changes leds brigtness)Red LEDComponents for Epyx Fast Load Cartridge Part:27c64 or 27c128 or 27c256 or 27c512 (DIP28)DIP28 wide IC socket74LS07DIP14 IC socket100nf CAPACITOR0.47 μF CAPACITOR ( 470 nF )2.7K 1/4 WATT RESISTANCE

I have been making PCB from last 2 years and this is my first PCB as an Art. If you want to make PCB's like this, subscribe to my youtube channel - https://www.youtube.com/looplinks. Soon i will be uploading video on how to design PCB like this. I am waiting for the PCB's to arrive, Once i receive them, i will post video about it.Just to give a glance, i used inkscape, gimp, kicad, and svg2shenzhen extension to design the PCB.So please share my project to others.https://www.youtube.com/looplinks

Hi! :)I am an Electrical Engineering student from Croatia and I built this device as a part of one course at University last semester. It is a fidget spinner which uses Persistence of Vision effect which is an optical illusion whereby multiple discrete images blend into a single image in the human mind.The text or graphics can be changed via Bluetooth Low Energy link by using a PC application that I have programmed in LabVIEW or by using a freely available smartphone BLE app.One of the most important characteristics is that the displayed graphics doesn’t depend on rotation velocity thanks to its innovative solution for keeping the track of rotation angle. Meaning that the displayed graphic is perceived the same at both, higher and lower rotational speeds (for instance, when the fidget spinner is slowing down when held in the hand).This is also one of the main difference between various POV device on the market (POV clocks, etc.) which must have a constant rotational speed in order for the image to be displayed correctly.It is also worth noting that all the components are selected to have the lowest possible energy use in an effort to prolong the battery life Technical DescriptionIt uses enhanced Microchip PIC 16F1619 microcontroller as its core. The MCU has built-in Angular Timer peripheral which uses omnipolar Hall sensor DRV5033 and one magnet to keep the track of current rotational angle.The graphics is displayed using a total of 32 LEDs, 16 green and 16 red light emitting diodes (nominal current 2mA). The diodes are driven by two 16 channel constant current shift register drivers TLC59282 connected in daisy chain.In order to have a remote access to the device, there is a Bluetooth Low Energy module RN4871 which communicates to the microcontroller via UART interface. The device can be accessed from either a personal computer or a smartphone.The device is turned on by using a capacitive touch button which is embedded under the solder mask on the printed circuit board. The output from the capacitive IC PCF8883 is fed to the OR logic gate BU4S71G2. The other input to the OR gates is a signal from the MCU. The output from OR gates is connected to the Enable pin of a step-down converter TPS62745. By using this setup I am able to power on/off the device by using only one touch button.Capacitive button can also be used to change between different modes of operation or for instance to turn on the bluetooth radio only when needed in order to save energy.Step down converter TPS62745 converts 6V nominal from the batteries to a stable 3.3V. I have choose this converter because it has high efficiency with light loads, low quiescent current, operates with a tiny 4.7uH coil, it has integrated input voltage switch which I use to measure battery's capacity with minimal current consumption and the output voltage is user-selectable by four inputs rather than feedback resistors (reduces BOM). The device goes to sleep automatically after 5min of inactivity. The current consumption in sleep is less than 7uA.The batteries are located on the back: Keeping the track of rotational angleThe rotational angle is tracked "by hardware“ rather by software meaning that the CPU has a lot more time at its disposal to do other tasks. For that I have used Angular Timer peripheral which is built into the used microcontroller PIC 16F1619.Input to the Angular Timer is a signal from Hall sensor DRV5033. The Hall sensor will generate a pulse every time a magnet passes by it. The Hall sensor is located at the spinning part of the device while the magnet is located on a static part for which the user holds the device. Since I used only one magnet that means that the Hall sensor will produce a pulse that is repeating every 360°.At the same time Angular Timer will generate 180 pulses per revolution in which every pulse represents 2° of rotation. I choose 180 pulses, and not 360° for instance, because I found 2° to be the perfect distance between the two columns of a printed character.The Angular Timer handles all that calculation automatically and will adjust automatically if the time between the two sensor pulses changes due to the rotation velocity changing. The positon of the magnet and Hall sensor is shown in the picture below.Remote AccessI wanted a way to change the displaying text dynamically and not by just hard coding it into the code. I have choose BLE because it uses a very small amount of energy and the used chip RN4871 is only 9 x 11.5 mm in dimension.Via BT link I am able to change the displaying text and its color - red or green. I can also monitor battery level to know when it is time to replace the batteries.The device can be controlled via computer application programmed in LabVIEW graphics programming environment or by using a freely available smartphone BLE applications which has the ability to directly write to the selected BLE Characteristics of a connected device.For sending the information from a PC/smartphone to the device I used one Service with three Characteristics, each identified by a Handle. PC ApplicationIn the top-left corner we have controls for starting up the National Instruments BLE server application. That is a command line application from NI which creates a bridge between BLE module on a computer and LabVIEW. It uses HTTP protocol to communicate. The reason for using this application is that LabVIEW only has native support for Bluetooth Classic and not for BLE. Upon successful connecting, the MAC address of a connected device is displayed on the right and that part is not grayed out anymore. There we can set the moving graphics and its color or just send some pattern to turn the LEDs on or off when the device is not spinning, I have used that for testing purposes. FontI generated English alphabet font using a freely available software "The Dot Factory“ but I needed to make a few modification before uploading it to the microcontroller.The reason for that is PCB layout which is "not in order“, meaning the output 0 from LED driver is maybe not connected to the LED 0 on the PCB, OUT 1 is not connected to LED 1 but rather to LED15 for instance, and etc.. The other reason is the software only allowed to generate 2x8bit font but the device has 16 LED for each color so I needed a 16bit high font.So I needed to make a software that would shift a few bits to compensate for PCB layout and combine them to one 16bit value.Because of that I developed a separate application in LabVIEW that takes the font generated in "The Dot Factory“ as input and transforms it to suit the needs of this project. Since the red and green LED PCB layouts are different I needed to use two fonts. The output for the green font is shown in the picture below. Programming jigOn the picture you can see the programming jig I have used to programe the device.Since, after every programming, I need to pick up the device and spin it to see the changes I didn't want to use standard programming headers or just solder the programming wires. I used Pogo pins which have a small spring inside them so they fit very tightly to the vias on the PCB.By using this setup I am able to program the microcontroller very fast and don’t need to worry about programming wires or the left-over solder after desoldering those wires. ConclusionTo summarize, I would like to point out that by using Angul Timer peripheral I successfully achieved a POV device which doesn’t depend on rotational velocity, so the quality of displayed graphics is kept the same at both higher and lower speeds.By careful design I managed to implement a low energy solution which will prolong the batteries life.As for the cons of this project I would like to point out there is no way to charge the used batteries, so battery replacement every now and then is required. No-name batteries from the local store lasted about 1 months with every-day use. Uses:This device can be used in a various promotional purposes or as teaching aid in electrotechnics or physics classes for instance.It can also be used as a therapeutic aid to increase attention for those with Attention Deficit Hyperactivity Disorder (ADHD) or calm symptoms of anxiety. The schematics and BOM are attached. The Gerbers have three separate circular boards - the front board (which holds the magnet), back side board, and a small circular ring to encrease the contact surface with the 608 bearing in the middle of the device.Also, I would like to thanks Simon from PCBWay for sponsoring the first version of the PCB :)3D output from Altium DesignerBill of Materials (BOM) in PDF format is available here:https://files.fm/down.php?cf&i=m6dx2ks8&n=BOM+%283%29.xlsxBOM in Excel format is available through "BOM(Bill of materials)" button on the top right of this page.

64K-CUPCAKE-CARTHello,This is a tested and working circuit.64K-CUPCAKE-CART is a 64KB capacity Commodore 64 cartridge.64K-CUPCAKE-CART is designed for making a cartridge, from any ".PRG" extension Commodore 64 software.".PRG" extension C64 software is a single part working c64 program. Multiple part loading software are not suitable for this cartridge.64K-CUPCAKE-CART can also work as a generic 16KB C64 game cartridge.64K-CUPCAKE-CART can also work as a 16KB I/O-1 automatic shutdown DELA module. (You can prepare 16KB module roms with "dela eprommer ii" program.)ROM FILE CREATING (via windows pc)Inside the "64K_CUPCAKE_CART.zip" file you will find two files. "SAMPLE.BIN" and "starter64k.bin""SAMPLE.BIN" is a sample ROM file, you can just program it into a w27c512 and begin to enjoy your cartridge."starter64k.bin" is a 513 BYTES code, for transfering data from cartridge to computer memory, and then shut the cartridge off.To prepare a ROM file for 64K-CUPCAKE-CART; first, you need to get a ".PRG" extension C64 program/game, and run it, to see if it is working.Then you need to load your ".PRG" extension program from a "HEX Editor" software. (you can use free "HxD Hex Editor") Then sellect and delete first and second bytes of your ".PRG" extension program. (2 bytes from the beginning)(it is usually "01 08")"Sellect all" and "copy" it.Then load "starter64k.bin"" file from the "Hex Editor"."Paste" the coppied data after last Byte of starter64k, (line 200) after (FF). (FF will remain)Save the file with a new name like "EPROM.BIN"Your ROM file is ready for programming.Download link for "starter64k.bin" and sample ROMhttps://archive.org/download/64kcupcakecart/64K_CUPCAKE_CART.zipCOMPONENTS64K-CUPCAKE-CART PCBCD4516BEDIP16 IC SOCKET (Some cd4516be chips can be defective, you should use a socket)2pcs. 1N4148 DIODE2pcs. 68K 1/4 watt RESISTANCE1μF ELECTROLYTIC CAPACITOR (any voltage more than 5volts)w27c512 (CUPCAKECART is suitable for 27128 (16KB), 27c256 (32KB), 27c512 (64KB))DIP28 IC SOCKET (For eprom)You also need an "Eprom Programmer" for programing your ROM file in to eprom.In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.