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What is it?A PCB coaster designed with commonly used schematic symbols. It has a total of 96 symbols.Included SymbolsDC Power/ Power Sources/ Ground/ Connections/ Resistor/ Potentiometer/ Rheostat/ LDR/ Thermocouple/ Capacitor/ Inductor/ Ferrite/ Fuse/ Diode/ BJT/ MOSFET/ JFET/ Darlington/ IGBT/ Triac/ Transistor/ SCR/ Pushbutton/ Switch/ Relay/ Crystal/ Antenna/ Motor/ Speaker/Buzzer/Mic / IC/ Logic Gates/ Voltage Regulator/ Voltage Reference/ OpAmp/ OptocouplerSpecificationBlack solder mask with ENIG-RoHS finish and white silk screen.10cm x 10cm x 1.6cm (3-15/16" x 3-15/16" x 5/8")The design is contributed by Digital Cool in Canada.You can also get it directly in our gift shop:https://www.pcbway.com/project/gifts_detail/PCBWay_PCB_Coaster_Schematic_Symbol_Reference_Guide.html
PCBWay PCB Coaster Schematic Symbol Reference Guide board

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PCBWay Official

HONG KONG

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PCBWay Official
What is it?A PCB coaster designed with commonly used SMT (Surface Mount Technology) footprints. It has a total of 135 different footprints.FeaturesICs from SOP to BGAA grid for measuring partsElectrolytic Capacitors & Voltage CodeTantalum CapacitorsTwo pin footprint from 01005 to 2920 (Imperial)USB Type CDiodesTransistorsMELFFeed ThroughLEDsCrystalsButtonsConnector PitchSpecificationBlack solder mask with ENIG-RoHS finish and white silk screen.10cm x 10cm x 1.6cm (3-15/16" x 3-15/16" x 5/8")The design is contributed by Digital Cool in Canada.You can also get it directly in our gift shophttps://www.pcbway.com/project/gifts_detail/PCBWay_PCB_Coaster_SMT_Footprint_Reference_Guide.html
PCBWay PCB Coaster SMT Footprint Reference Guide board

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PCBWay Official

HONG KONG

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PCBWay Official
This is the updated file:Due to the request of some users, I changed the IC2 regulator’s part number and modified the PCB. The new regulator (L7805-D2PACK) is very easy to find in the market. Please use 8-ohm speakers to prevent thermal stress on the IC2 (regulator) at high amplifier output power and try not to apply more than 9V to the input.More information please check here:https://www.pcbway.com/blog/technology/A_Digital_FM_Receiver_with_Arduino.html
A Digital FM Receiver with Arduino（updated）

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PCBWay Official

HONG KONG

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PCBWay Official
Nowadays USB port is used widely for data transactions between electronic devices and computers. In many scenarios, there is no need to communicate with the USB port directly, therefore electronic designers use USB to UART (RS232-Serial) converter chips, so the USB port is converted to a virtual COM port on the computer. The initial thought of many designers is to use FTDI chips to do the USB to UART conversion. There is nothing wrong with FTDI chips, however, they are expensive. In this article/video, I introduced a cheap USB to UART converter module that uses the MCP2200 chip from Microchip. The converter supports both 3.3V and 5V serial logic levels and uses three LED indicators for power connection, data transmission, and data reception.The module supports the serial CTS and RTS pins, also six GPIOs that can be used for direct controlling of connected devices. The serial data of the module has been examined and decoded using the UART decoding feature of the Siglent SDS2102X Plus oscilloscope. So let’s get started!More details please check:https://www.pcbway.com/blog/technology/Cheap_USB_to_UART_Converter_using_Microchip_MCP2200.htmlhttps://www.pcbway.com/blog/technology/Cheap_USB_to_UART_Converter_using_Microchip_MCP2200.html
Cheap USB to UART Converter using Microchip MCP2200

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PCBWay Official

HONG KONG

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PCBWay Official
Power supplies are one of the most popular topics in electronics. There are two major types of regulated power supply: linear and switching. Both power supply types introduce some advantages and disadvantages, however, a linear power supply offers better line and load regulation figures and it handles lower noise at the output, specifically when the power supply is adjustable and the output is under load; although its efficiency is lower than a switching power supply. In this article/video, I introduced an adjustable 30V-4A linear power supply that provides constant voltage and constant current adjustment. The output noise of the power supply is low and has measured using the power analysis feature of the Siglent SDS2102X Plus oscilloscope. All component packages are through-hole, so you don’t need any special tool for soldering.Let’s get started! More information please check here:https://www.pcbway.com/blog/technology/30V_4A_Adjustable_Power_Supply__CC_CV_.html
30V-4A Adjustable Power Supply (CC-CV)

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PCBWay Official

HONG KONG

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PCBWay Official
FM transmitters/receivers are among the top favorite circuits of any electronic enthusiast. In this article/video, I have introduced a complete digital FM receiver design that has equipped with an LCD screen and three push-buttons. It can search for the FM signals from 76MHz to 108MHz manually and automatically (Scan mode). The signal strength is also displayed as a bar graph on the LCD screen. The output sound is amplified by a 3W+3W Class-D stereo amplifier that handles high-quality and strong enough audio power. As a controller, I have used the cheap and popular Arduino-Nano board. So let’s get started!More information please check here:https://www.pcbway.com/blog/technology/A_Digital_FM_Receiver_with_Arduino.htmlupdated file here:https://www.pcbway.com/project/shareproject/A_Digital_FM_Receiver_with_Arduino_updated_.html
A Digital FM Receiver with Arduino

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PCBWay Official

HONG KONG

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PCBWay Official
An H-Bridge (Full-Bridge) driver is quite popular in driving loads such as brushed DC motors and it is widely used in robotics and industry. The main advantages of using an H-Bridge driver are: high efficiency, rotation direction change, and braking the motor. In this article/video, I have introduced a complete H-Bridge DC motor driver using four IR3205 power MOSFETs and two IR2104 MOSFET drivers. Theoretically, the above-mentioned MOSFET can handle currents up to 80A, however, in practice we can expect to get currents up to 40A if the MOSFET temp[erature is kept as low as possible, using a big heatsink or even a fan.More details check here:https://www.pcbway.com/blog/technology/Powerful_H_Bridge_DC_Motor_Driver.html
Powerful H-Bridge DC Motor Driver

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PCBWay Official

HONG KONG

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PCBWay Official
As we all know, the COVID-19 outbreak hit the world and changed our lifestyle. In this condition, alcohol and hand sanitizers are vital, expensive, and in some areas hard to find fluids, so, they must be used properly and efficiently. In the second version of the hand sanitizer dispenser device, I have addressed the previous design problems and introduces a device with no sensitivity to the ambient light and flow control capability of the alcohol/sanitizer. Therefore just enough amount of liquid will be poured on each request. The design uses a cheap ATTiny13 microcontroller.More information please check here:https://www.pcbway.com/blog/technology/Automatic_Hand_Sanitizer_Dispenser__Version_2___Using_ATTiny13.html
Automatic Hand Sanitizer Dispenser (Version 2), Using ATTiny13

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PCBWay Official

HONG KONG

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PCBWay Official
AC loads live with us! Because they are everywhere around us and at least home appliances are supplied with the mains power. Many types of industrial equipment are also powered with the single-phase 220V-AC. Therefore, we frequently face situations that we need to have full control (dimming) over an AC load, such as a lamp, an AC motor, a vacuum cleaner, a drill, … etc. We should know that controlling an AC load is not as simple as a DC load. We have to use a different electronic circuit and strategy. Moreover, if an AC dimmer designed digitally, it is considered a time-critical application, and the microcontroller’s code must be written carefully and efficiently. In this article, I introduced an isolated 4000W digital AC dimmer that consists of two parts: the mainboard and the panel. The panel board provides two push buttons and a seven-segment display that allows the user to adjust the output voltage smoothly.More information pleaes check:https://www.pcbway.com/blog/technology/4000W_Standalone_Digital_AC_Dimmer_Using_STM32.htmlMainboard PCB design check here:https://www.pcbway.com/project/shareproject/4000W_Standalone_Digital_AC_Dimmer_Using_STM32.htmlhttps://www.pcbway.com/blog/technology/4000W_Standalone_Digital_AC_Dimmer_Using_STM32.html
High Power Standalone Digital AC Dimmer Using STM32/Panel PCB

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PCBWay Official

HONG KONG

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PCBWay Official
AC loads live with us! Because they are everywhere around us and at least home appliances are supplied with the mains power. Many types of industrial equipment are also powered with the single-phase 220V-AC. Therefore, we frequently face situations that we need to have full control (dimming) over an AC load, such as a lamp, an AC motor, a vacuum cleaner, a drill, … etc. We should know that controlling an AC load is not as simple as a DC load. We have to use a different electronic circuit and strategy. Moreover, if an AC dimmer designed digitally, it is considered a time-critical application, and the microcontroller’s code must be written carefully and efficiently. In this article, I introduced an isolated 4000W digital AC dimmer that consists of two parts: the mainboard and the panel. The panel board provides two push buttons and a seven-segment display that allows the user to adjust the output voltage smoothly.More information pleaes check:https://www.pcbway.com/blog/technology/4000W_Standalone_Digital_AC_Dimmer_Using_STM32.htmlPanel PCB design check here:https://www.pcbway.com/project/shareproject/4000W_Standalone_Digital_AC_Dimmer_Using_STM32_Panel_PCB.html
High Power Standalone Digital AC Dimmer Using STM32 --Mainboard

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PCBWay Official

HONG KONG

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PCBWay Official
Inrush current/Switch-ON surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Inrush current is much higher than the load’s steady-state current and that’s the source of many problems such as fuse blowing up, load failure, load’s lifetime reduction, sparks at the switch contacts … etc. The figure below shows the inrush current phenomenon captured on the Siglent SDS1104X-E oscilloscope. The long spike is clear. In this article, I tried to address this problem with an easy, however an effective solution. I have introduced two circuits for both AC and DC loads.More information:https://www.pcbway.com/blog/technology/Inrush_Current_Limiter__Soft_Starter__for_AC_DC_Loads.htmlThe DC gerber file:https://www.pcbway.com/project/shareproject/Inrush_Current_Limiter__Soft_Starter__for_AC_DC_Loads___DC_gerber_file.htmlhttps://www.pcbway.com/blog/technology/Inrush_Current_Limiter__Soft_Starter__for_AC_DC_Loads.html
Inrush Current Limiter (Soft Starter) for AC/DC Loads----AC file

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PCBWay Official

HONG KONG

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PCBWay Official
Inrush current/Switch-ON surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Inrush current is much higher than the load’s steady-state current and that’s the source of many problems such as fuse blowing up, load failure, load’s lifetime reduction, sparks at the switch contacts … etc. The figure below shows the inrush current phenomenon captured on the Siglent SDS1104X-E oscilloscope. The long spike is clear. In this article, I tried to address this problem with an easy, however an effective solution. I have introduced two circuits for both AC and DC loads.More information:https://www.pcbway.com/blog/technology/Inrush_Current_Limiter__Soft_Starter__for_AC_DC_Loads.htmlAC file:https://www.pcbway.com/project/shareproject/Inrush_Current_Limiter__Soft_Starter__for_AC_DC_Loads____AC_file.html
Inrush Current Limiter (Soft Starter) for AC/DC Loads---DC gerber file

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PCBWay Official

HONG KONG

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PCBWay Official
As we all know, the COVID-19 outbreak hit the world and changed our lifestyle. In this condition, Alcohol and hand sanitizers are vital fluids, however, they must be used properly. Touching alcohol containers or hand sanitizers with infected hands can spread the virus to the next person. In this article, we will build an automatic hand sanitizer dispenser that uses IR sensors to detect the presence of a hand and activates a pump to pour the liquid on the hand. The intention was to find the cheapest and easiest solution and design a circuit. Therefore no Microcontroller or Arduino has been used. Two designs have been introduced and you are free to select and build any of them. The first design uses SMD components and the second design is even simpler. It uses DIP components on a small single layer PCB board.This is the second design,more information please checkhttps://www.pcbway.com/blog/technology/DIY_Automatic_Hand_Sanitizer_Dispenser__without_Arduino_or_MCU.html
DIY Automatic Hand Sanitizer Dispenser, without Arduino or MCU---First Design

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PCBWay Official

HONG KONG

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3

PCBWay Official
As we all know, the COVID-19 outbreak hit the world and changed our lifestyle. In this condition, Alcohol and hand sanitizers are vital fluids, however, they must be used properly. Touching alcohol containers or hand sanitizers with infected hands can spread the virus to the next person. In this article, we will build an automatic hand sanitizer dispenser that uses IR sensors to detect the presence of a hand and activates a pump to pour the liquid on the hand. The intention was to find the cheapest and easiest solution and design a circuit. Therefore no Microcontroller or Arduino has been used. Two designs have been introduced and you are free to select and build any of them. The first design uses SMD components and the second design is even simpler. It uses DIP components on a small single layer PCB board.This is the first design,more information please checkhttps://www.pcbway.com/blog/technology/DIY_Automatic_Hand_Sanitizer_Dispenser__without_Arduino_or_MCU.html
DIY Automatic Hand Sanitizer Dispenser, without Arduino or MCU---Second Design

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PCBWay Official

HONG KONG

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PCBWay Official
The figure shows the schematic diagram of the device. D1 and D2 are rectifier diodes. C1 and C2 build the first noise reduction filter stage.More details please check https://www.pcbway.com/blog/technology/Low_Noise_Adjustable_Linear_AC_DC_Power_Supply.html
Low Noise Adjustable Linear AC-DC Power Supply

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PCBWay Official

HONG KONG

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PCBWay Official
The STM8S001J3 is an 8-bit microcontroller that offers 8 Kbytes of Flash program memory, plus an integrated true data EEPROM. It is referred to as a low-density device in the STM8S microcontroller family. This MCU offered in a small SO8N package. In this article, we are going to build a programmable LED Police-Flasher device that can be used for vehicles, motorcycles, and bicycles.Figure 1 shows the schematic diagram of the device. The heart of this circuit is an STM8S001 microcontroller.More information please check https://www.pcbway.com/blog/technology/Programmable_Police_LED_Flasher_Using_an_STM8.html
Programmable Police LED Flasher Using an STM8

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PCBWay Official

HONG KONG

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PCBWay Official

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