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Electronics Circuits


Super Flux RGB LED Controller

In this project it was used the "Piranha Super-flux RGB" Led of common anode, and the PIC18F25K20, in order to generate combinations of colors. more

Dot matrix LED running display

The device is separated of two parts named LED control board and LED display board. Two PCBs are designed to fit together one behind other using two sets of dual row .. more

Dual Adjustable Power Supply


This project is a solution to power up most of devices or projects requiring dual (+/-) adjustable power supply. more

PIR Sensor


Project is based on Holtek's IC HT7610A, which is a CMOS LSI chip designed for use in automatic PIR lamp, flash or buzzer control. It can operate in 3-wire configuration for relay applications. more

Voltmeter + Ammeter LCD panel

 This multimeter was designed to measure output voltage and current in a PSU, where the current sense shunt resistor is connected in series with load at the negative voltage rail. It needs only one supply voltage that can be acquired from main PSU. more

iButton electronic lock

 In this project we will use iButton as a key to an electronic lock. This electronic lock can use many different kinds of iButtons and can store up to 9 different keys. more

TransistorType & Polarity Identifier

TraId is a simple transistor tester and pinout identifier. It is able to test bipolar transistors as well as N-mosfet and P-mosfet. more

DigiPot - Rotary Encoder Potentiometer

DigiPot is a digital potentiometer using a rotary encoder as input along with a 7 segment display that show the current pot value. more

2.4V to 5V Step Up DC-DC Converter

This project has been designed around Texas Instrument's LM2623 IC, The LM2623 is a high efficiency, general purpose step-up DC-DC switching regulator. more

PIC16F84A Development Board

This is a new design of a tutorial board based on the popular PIC16F84A microcontroller. It features eight single leds, a 7-segment display, an LCD display and five push buttons.more

MAX2606 - Hands-Free Car Kit

This project is car hands free that retransmits the audio signal from a cell phone to the FM broadcast band. By placing the cell phone's speaker near the microphone...more



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 .: Online Community


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July 16, 2015

BBC Micro Bit computer’s final design revealed

Microchip Touch and Gesture Solutions

35VIN & VOUT battery charge controller delivers up to 20A

An Android Reflow controller that anyone can build

July 15, 2015

Super Simple Arduino Load Driver V2.0

How to make a USB Li-Ion charger

1Mbit SPI FRAM comes in chip-scale packaging

July 14, 2015

Ultralow-power circuit improves efficiency of energy harvesting to more than 80 percent

Arduino CNC Shield – 100% GRBL Compatable

Thermal Conductivity: What is it and Why You Should Care

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 .: Tiny DDS - Open source DDS generator



This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier. more


 .: LM2585 12V to 24V @ 1A Step-up switching regulator




This is a DC-DC step-up converter based on LM2585-ADJ regulator manufactured by Texas Instruments. This IC was choosen for it's simplicity of use, requiring minimal external components and for it's ability to control the output voltage by defining the feedback resistors more

 .: Motorcycle Universal Gear Indicator




This is a new design for a universal gear indicator that can be fitted to any motorcycle as an aftermarket accessory. Its main advantage is that its operation depends entirely on the gear shift lever movement, instead of connecting to speedometer ... more

 .: Open Source 3.2" TFT Smart Display




This project is an open source 3.2" Smart TFT display board. The board is based on a PIC32 and a 3.2' TFT with touchscreen (ILI9320 controller, using 16bits PMP). The software has two main parts. One that produces the 2D functions and a GUI with various widgets (buttons, check boxes, sliders etc) more

 .: DDS Function Generator




This project is a new implementation of the AVR DDS signal generator v2.0 found on  scienceprog.com. Itis a firmware based DDS signal generator and has two outputs - one for DDS signal and another for high speed [1..8MHz] square signal. Offset and amplitude can be regulated by two potentiometers. more

 .: USB Single Cell LiPoly Charger

Lithium Polymer Batteries are a very common source of power today. Many electronics gadgets have one inside, and they have some reasonable features. I've bought great batteries, with different sizes and capacities for my electronics projects. more

 .: Serial 4-digit seven segment LED display



This project is a 7 segment LED display module that can be driven using SPI protocol, so it needs only 3 pins of your mcu to drive 4 x LED displays. It's based on MAX7219 LED display driver. more


 .: Audio Power Amplifier with TDA2050



This is not an ordinary project, but an attempt to make a PCB that is suitable for TDA2050 and LM1875 and has all the necessary circuitry on board - power supply, speaker protection, delayed turn-on and fast turn-off. This is achieved using the convenient uPC1237 IC. more


 .: CAN to USB Interface



This project started out from a need to build a simple device for monitoring the CAN bus. I choose the NUC140LC1CN 32K Cortex-M0 microprocessor from Nuvoton for major reason - it has both USB and CAN peripherals. more

 .: ATmega64 Development Board



This project is a development board for Atmel ATmega64 microcontoller and can be used to easily develop custom AVR firmware or as an introduction board to microproccessors and programming. more


 .: 0-30V Power Supply with Current Control 2mA-3A



Build a high quality power supply with a continuously variable stabilized output adjustable at any value between 0 and 30VDC. The circuit incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of 3A that the circuit can deliver. more

 .: Simple SMD LED tester



This project is a simple LED tester and LED polarity checker. It can be used to check 1206, 0805, 0603 and 5mm LEDs. All parts are readily available and they are very cheap. more


 .: Low Frequency Spectrum Analyzer for Automotive Suspension Analysis



This project is an accelerometer data acquisition system for automotive suspension analysis. In other words it's a low frequency spectrum analyzer based on Lanchpad TIVA Series from Texas Semiconductors. more

 .: EGYDuino - Arduino compatible board



EGYDuino is a DIY Arduino clone made on a single sided PCB board. It's simple and cheap to build using home PCB fabrication methods and it's 100% compatible with Arduino. more

 .: Temperature Controlled PC FAN



This project is a temprerature controller for a PC FAN. It regulates the speed of the FAN attached to it according to measured temperature. Temperature is sensed using a simple NTC thermistor. more

 .: FM VCO Transmitter



This is a VCO FM Transmitter with range 500m - 4km depending on antenna used. Power supply is 12Vdc@100mA, RF power is 400mW, output impedance 50-75ohm, Frequency range: 87,5-108 MHz, modulation: wideband FM. more

 .: 20 Seconds Voice Record - Playback



This project has been designed around Winbond's ISD1616 IC (SMD) IC, which is fully integrated, single-chip, single message voice record and playback device ideally suited to a variety of electronics systems. more


 .: Long Duration Timer



This timer project can be used to switch ON/OFF any device after a set time, this circuit can be used in lots of application like switched ON/OFF Radio, TV, Fan, Pump, kitchen timer, the circuit describe here its unique in its own. more


 .: Electronic Toggle Switch



The circuit is based on CMOS CD4013 Flip Flop IC, The circuit has two stable states, ON and OFF. Once it is ON, it remains ON till you press the switch again. A short button press of a tactile switch SW1 latches the circuit ON and another toggles it back OFF. more

 .: USB to Serial converter using PL2303SA



This USB to serial (TTL) converter project is easy to build, it is simple and inexpensive. It is based on the PL2303SA USB to USART bridge from Prolific. more

 .: Unipolar 4-Phase Stepper Motor Controller



Unipolar 4-Phase Stepper Motor Controller Board will help you control a Stepper Motor or 4 individual Solenoids. This circuit consisting of transistors that serve as current amplifier and also diode to prevent damaging back EMF. more

 .: USB to Serial converter using FTDI FT230X



This USB to serial converter project is easy to build, it is simple and inexpensive. It is based on the FT230XS from FTDI Chip. more

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 01/06/2015 - New project added
 01/06/2015 - New project added
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New project added

best android tv box on DHgate.com

 .:  Last Added Projects  :.

Unipolar 4-Phase Stepper Motor Control
DS1307 Real Time Clock Module
RS232 or RS485 Module
40 & 28 PIN PIC Development Board
3.3V Voltage Regulator
RS232 to RS485 Module
12V Lead Acid Battery Voltage Monitor
16F628A development board
0-10V Voltage Monitor
PIC 18F - 28 PIN PIC Development Board
Variable Range LED Voltmeter
RS232 - MAX232 Interface Module
Colpitts Crystal Oscillator
NiCad-NiMh Battery Monitor
10W Stereo Audio Amplifier
6.5W Stereo Audio Amplifier
Mini Stereo Audio Amplifier
2 Channel Relay Board
5.5W - 2 Channel Audio Amplifier
14W Stereo Audio Amplifier
20W Bridge Audio Amplifier
Mini Audio Amplifier
20 to 80 Seconds Voice Record Playback
1 to 100 Seconds Timer
MIC Pre-amplifier
BitCake - Electronic Birthday Cake
Frequency counter with PIC16F628A
LED VU Meter with LM3916
Simple timer with PIC16F628A
50W Power Amplifier with LM3886
Original PICKIT-2 programmer
Advanced LC meter
Simple LC meter
Audio Power Amplifier with TDA2050
RGB LED Disco Lights
MCU based running light controller
3 Tone Siren
One Channel Relay Driver
8 Channel Relay Board
5W Stereo Audio Amplifier
20W Audio Amplifier
Voice Echo
Tiny DDS - Open source DDS generator
Digitally Controlled 2.1 Audio Amplifier
60 seconds Voice Record - Playback
3 Tone Musical Bell
12W Audio Amplifier
Voice Modulator (Sound Effects)
Tape Head Pre-Amplifier
Triac based lamp dimmer
120 Seconds Voice Record - Playback
2.4V to 5V Step Up DC-DC Converter
PIR Sensor
Water Level Alarm
+/-12V Dual Power Supply
Sound Activated Switch
20 Seconds Voice Record - Playback
Dual Adjustable Power Supply
Long Duration Timer
Electronic Toggle Switch
USB to Serial Converter using AVR mcu
9V to 48V DC-DC Converter
Thermocouple Type-K amplifier
CAN to USB Interface
Serial converter using FTDI FT230X
USB to Serial converter using PL2303SA
0-30V Laboratory Power Supply
Serial AVR and PIC programmer
8 Opto-isolated Relay board
EGYDuino - Arduino compatible board
ATmega64 Development Board
HV Nixie DC-DC Switching Power Supply
Variable Power Supply with LM7812
Temperature Controlled PC FAN
Valentine LED Chaser
AMP - Arachnoid Mobile Platform
MCU Controlled Spot Welder

miniLOG - Precision Voltage Logger
Simple SMD LED tester
Serial 4-digit seven segment LED display

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 .: High Power LED mood Lamp

In this page we will introduce a great project designed by Toon Beerten. His project named "DIY Led Mood Lamp" can become a very interesting add-on for your room that's absolutely sure it will impress everyone. As you can see on the photos, we talk about a color fading lamp, that looks amazing! more

 .: Timer for PCB Exposure Box

Yet another great project by Vassilis Papanikolaou. This darkroom timer is an improved version of the Darkroom timer originally created by Stan Ockers (1999). It's an ideal timer for UV exposure boxes and such a devices. Many new features are added. Check it know! more

 .: USB Sound Card with PCM2702

Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. more

 .: USB to RS485 Adapter

While developing the Luma RS485-networked LED driver we discovered a need for a small and inexpensive USB to RS485 adapter. We designed an adapter with a FTDI basic UART chip (FT230XS) and an inexpensive TI differential receiver (SN75176). Our small selection of parts brings the cost down to just over $5 for one adapter. more

 .: 89Sxx Development Board

This is a single side development board with In System Programmable Flash based microcontroller, 89Sxx series more

 .: HV Nixie DC-DC Power Supply

Nixie tubes need about ~180Vdc to light up and thus on most devices a DC-DC converter is needed. We designed here a simple DC-DC switching regulator capable of powering most of Nixie tubes. more

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  .: Electronics Lab Communnity - Recent Posts

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