AMIGA 500 ROM REPLACEMENT ADAPTER FOR REV. 5 MOTHERBOARDS This is A500 315093-01 Kickstart ROM replacement/switcher adapter for only REV.5 Motherboards. Hello, This is a tested and working circuit board. REV. 5 Amiga 500 motherboards mostly produced with v1.2 ROM (315093-01) For stability of working performance 4.7K pull-up resistors are placed on adress lines. This a500 Kickstart ROM replacement adapter easily fits A500 REV.5 Motherboards. With 27C160 EPROM you can select and use 4 (4 banks x 512KB) different Kickstart ROMsWith 27C800 EPROM you can select and use 2 (2 banks x 512KB) different Kickstart ROMsWith 27C400 EPROM you can use only 1 (512KB) Kickstart ROM (If you are using this adapter with 27C400 EPROM then pin1 and pin42 of the eprom socket should be left empty.)If your binary ROM file is 256KB then you should append it to itself to make a 512Kb file. You can simpy do this with a "HEX-Editor" program.You can also use Amiga diagnostic ROM (DIAGROM) with this ROM Adapter. https://www.diagrom.com/index.php/download/For reading original Amiga ROMs or for programming 27C400/800/160 with a "TL866 Programmer" you need to make this eprom adaptor. (It has 2 switches on it and helps you to program 27c160 eprom in 4 steps, each 512Kb bank in one step)https://www.pcbway.com/project/shareproject/27C400_800_160____27C4096_EPROM_Programming_Adapter.htmlMany thanks to Ozay TURAYThis project only includes a specially designed PCB. No Amiga ROM file will be shared.WINUAE Emulator .ROM files are not suitable for eproms, because they are byte-swapped files, they do not work. You need Binary ".BIN" ROM image files. You can find more information on the internet forums. This ROM adapter is specialy designed and only suitable to the Amiga 500 REV.5 Motherboards. It is not suitable for A500 REV.6 Motherboards. If you need a ROM adapter for A500 REV.6 motherboard you can find it here;https://www.pcbway.com/project/shareproject/AMIGA_500_ROM_REPLACEMENT_ADAPTOR_FOR_REV__6_MOTHERBOARDS.htmlALWAYS TURN YOUR AMIGA OFF BEFORE CHANGING/SWITHING BETWEEN DIFFERENT ROMS!As you can see, I have uploaded many projects and still working on new projects. If you have any questions please search answers from the internet. Unless I explicitly stated, all my projects are tested under normal conditions and confirmed to work before being shared. I am sorry not having enough time to answer all the questions.COMPONENTS:27C160 or 27C800 or 27C400 (DIP)DIP42 2.54 pitch wide IC Socket (You can use 28pin or 32pin two sockets by cutting one of them)20pcs. 4.7K 1/4 watt 1206 SMD Resistors (R1-R20)2pcs 20pin Round Male Haders4pin Male Headers2pcs. jumper cap

AMIGA 500 ROM REPLACEMENT ADAPTER FOR REV. 6 MOTHERBOARDS A500 Kickstart ROM replacement/switcher adapter for REV.6 Motherboards. (Keyboard friendly) Hello, This is a tested and working circuit board.This A500 Kickstart ROM replacement adapter easily fits A500 REV.6 Motherboards. This ROM adapter is specialy designed suitable to the Amiga 500 keyboard position.REV. 6 Amiga 500 motherboards mostly produced with v1.3 ROM (315093-02)With 27C160 EPROM you can select and use 4 (4 banks x 512KB) different Kickstart ROMsWith 27C800 EPROM you can select and use 2 (2 banks x 512KB) different Kickstart ROMsWith 27C400 EPROM you can use only 1 (512KB) Kickstart ROM (If you are using 27C400 eprom then you do not need to use this adapter for REV.6 boards, you can just insert 27C400 directly to the ROM socket.). If you are using this adapter with a 27C400 EPROM then pin1 and pin42 of the eprom socket should be left empty.If your binary ROM file is 256KB then you should append it to itself to make a 512Kb file. You can simpy do this with a "HEX-Editor" program.You can also use Amiga diagnostic ROM (DIAGROM) with this ROM Adapter.https://www.diagrom.com/index.php/download/For reading original Amiga ROMs or for programming 27C400/800/160 with a "TL866 Programmer" you need to make this eprom adaptor. (It has 2 switches on it and helps you to program 27c160 eprom in 4 steps, each 512Kb bank in one step)https://www.pcbway.com/project/shareproject/27C400_800_160____27C4096_EPROM_Programming_Adapter.htmlMany thanks to Ozay TURAYThis project only includes a specially designed PCB. No Amiga ROM file will be shared.WINUAE Emulator .ROM files are not suitable for eproms, because they are byte-swapped files, they do not work. You need Binary ".BIN" ROM image files. You can find more information on the internet forums. This ROM replacement adapter is not for A500 REV.5 Motherboards. If you need a ROM adapter for A500 REV.5 motherboard you can find it here;https://www.pcbway.com/project/shareproject/AMIGA_500_ROM_REPLACEMENT_ADAPTOR_FOR_REV__5_MOTHERBOARDS.html ALWAYS TURN YOUR AMIGA OFF BEFORE CHANGING/SWITHING BETWEEN DIFFERENT ROMS!As you can see, I have uploaded many projects and still working on new projects. If you have any questions please search answers from the internet. Unless I explicitly stated, all my projects are tested under normal conditions and confirmed to work before being shared. I am sorry not having enough time to answer all the questions.COMPONENTS:27C160 or 27C800 or 27C400 (DIP)DIP42 2.54 pitch wide IC Socket (You can use 28pin or 32pin two sockets by cutting one of them)2pcs. 10K 1/4 Watt Resistors2pcs 20pin Round Male Haders4pin Male Headers2pcs. jumper cap

ATmega328PB has a second UART port that is sharing pins with ICSP/SPI. While this can be handy for debugging you may need to swap ICSP and UART dongles. Or you can solder the UART wires to the ICSP connector but then you will get ICSP traffic on UART and vice versa. So I've decided to create this simple breakout PCB that connects between your device and the ICSP/UART dongles and features switches to enable/disable the shared pins. I've also included one SMD LED with resistor. It is not needed for the main function but it will signal if the device is powered. And it is a great way to try SMD soldering. And I've added also a reset button as there was a free space on the PCB...Here you can see the finished board plugged into a board with ATmega328PB MCU. You can see both UART and ICSP programs running on the screenshot (of course they can not communicate both in the same moment):If you look closely, you can see that I had to scratch a ground plane as I had error in my gerbers - I forgot to update ground zone fills in KiCad before exporting the gerbers... :The gerbers in this project are of course fixed.I also decided to be a little bit fancy and try white soldermask that PCBWAY offers and it looks great...

A rather stylish looking faceplate to go with the C64 Joystick Adapter, it covers up most of the electronics and you get a professional look without even looking at a 3d-printer. The PCB has been designed so that it is reversible to reflect the two different PCB build options, one is for Atari-style controllers and the other is for Sega gamepads.

I recently bought a Raspberry Pi for use with emulators on modern systems, and so I wanted an easy way of connecting the original controllers up to them. This PCB can be built up in a few different ways, the first one allows all of the classic Commodore 64 controllers including one and two button joysticks as well as the paddles to be used. The other mode is for use with Sega gamepads, this includes the Sega Master System gamepad as well as the Sega Mega Drive (Sega Genesis in North America) 3- and 6-button controllers.There are also versions of the firmware that allows you to use the adapter with The64 Mini and Maxi system without any modification, which is a good thing because while the system is a lot of fun to use - the joysticks that come with them have to be considered the worst among all I've tried to use (including the horrible ones that came with my Atari 7800 controllers).Check out my github-repository for more details, as well as a more comprehensive description of the firmware and build options available. Note that there is also a separate faceplate that goes with the main PCB, it is reversible so that you can easily identify what the device has been built to use with.

Flash-based replacement for system rom on TRS-80 Model 100See http://tandy.wiki/FlexROM_100

Programming Adapter for FlashROM_100

Programming adapter for FlexROM_100

See: https://github.com/bkw77/PDDuinoUse ENIG finish because the two rows of holes form a friction-fit female connector, not soldered.

XUM1541 allows you to connect Commodore disk drives (i.e. 1541) to PC and read/write to disks.This board is a 4th revision of my PCB design. It is compact and DIY friendly (only through hole components are required).Instructions for WindowsFlashing XUM1541Download and unpack avrdude: https://github.com/mariusgreuel/avrdude/releases/Download latest firmware from OpenCBM repository for PROMICRO 7406 version: https://github.com/OpenCBM/OpenCBM/tree/master/xum1541 at the time this instruction is written: https://github.com/OpenCBM/OpenCBM/blob/master/xum1541/xum1541-PROMICRO_7406-v08.hexCopy firmware file to avrdude directory Open device manager. Connect XUM1541 to PC and press RESET button on XUM1541 board. A device in LPT & COM ports section will show up for few seconds. Note down what exact port number it was, i.e. COM5.Navigate to avrdude directory in Command Prompt, type in command but don't run it yet: avrdude -p m32u4 -c avr109 -P com5 -U flash:w:xum1541-PROMICRO_7406-v08.hexMake sure to replace com5 in above command to the port from step 4. Reset XUM1541 and run the command. XUM1541 will be flashed.Installing software (Windows 7-10 64bit)Download the installer from: https://github.com/r1me/TapeXUM/releases/download/1.0/xum-installer-x64.zipThis single button installer will detect XUM1541, install required OpenCBM libraries and CBMXfer software.https://github.com/mariusgreuel/avrdude/releases/

See my instructable for a full description of this board and the associated software.This board, if mounted in the 3D case specified in my instructable, uses two additional boards: 240x240 TFT LCD Display Module, and 5 Button Board.This version fixes:The heartbeat status LED was on a pin associated with a timer used by the RTC so it was flashing rather than fading in and out as expected. This LED is now on PD4.The Status LED connector is now mounted on the back of the board. If mounted on the front it won't fit in the enclosure.The RTC battery holder is moved so that it doesn't interfere with the display connector.

The most important part of a computer architecture is a clock circuit. This circuit has the option to run freely in a-stable mode and also operate in single step debugging mode.

The Suhr Riot is a versatile high-gain distortion pedal with the sonic characteristics and touch sensitivity of a high quality 100 watt tube amplifier. Riot will transform a clean amp into an authoritative rock tone that inspires all of your favorite riffs. The Riot features an easy to tweak layout which includes Gain, Level, Tone and a three position Voicing switch.More info you will find on https://guitar-gear.ru/forum/topic/3170-suhr-riot-distortion/

warning. no text. dl 1st then add by yrself

A circuit not very different from a common metronome but unlike the musical circuit, in this case we have to control both the beat frequency and the duty cycle of the wave. Two common integrated circuits have been chosen for the realization such as the 555 because we can delegate to the first integrated the management of the beat frequency and to the second the note to be heard in the earphone, the 555 also has output power at pin 3 such as to drive a 32 ohm earphone. The circuit works with a common 12V battery and, if kept at low volumes, the duration is considerable. ComponentsD1 1N4148D2 1N4148D3 1N4148VR1 3386P-1-101LFJ1 282843-2C2 C1206C103K5RACTUC3 C1206C103K5RACTUC4 C1206C103K5RACTUR3 CRCW12064K70FKEAR4 CRGH1206J22RBR1 ECA-2WHG010C1 ECA1CM470BC5 ECA1EHG101R5 ERA-8AEB103VR6 ERA-8AEB103VR2 MC0125W12065100KJ4 MJ-3523-SMT-TRIC1 NE555PIC2 NE555PJ2 PVG3A205C01R00J3 PVG3A205C01R00R1 RC1206FR-073K3L

A small simple circuit with available components to measure the voltage level of any battery by its voltage Percentage by set adjusted potentiometer R2 to set the first green LED as you want highest volte or full batter,and red led wite low volte. And you can set the rate of decrease or increase voltage between each LED by potentiometer R1; for example:The circuit can be set in the range of 12.7 to 10.7Or set Between 12.7 to 12 or set 10 to 9 volts Or 13 to 9 volts….ectIt supports wide range of voltage from from 4 volt to 24 volt batteriesThe circuit includes protection from Reverse polarity that happen with some users when connecte incorrectly