Content for PCB

Power Supply for 5V and 3.3V

“I normally use a USB port as power supply for my projects. Some ICs need 3.3V instead of 5V as Vcc. Therefore I decided to build a small power supply. It uses a range of 7-14V (I use 7V …

Programmable CW Morse Keyer / beacon

“The provided software is based on USB Virtual Com Port (VCP) device. The setup is done with command line interface using terminal from any PC. The setup is stored in the internal flash and PC is not required for normal …

PWM dimmer for LED lighting

“I have recently moved to a new apartment and was looking for a PWM dimmer to control some 12V LED strips. I thought that should be easy enough nowadays but it proved more difficult than I thought. All I found …

Raspberry Pi Controlled Sofa

“Since getting married a couple of months ago Im slowly getting back into the swing of things! It has been a busy few months as I have also left my school of nine years and will be starting a new …

Raspberry PI Zero LEDStrip Controller

“The Raspberry Pi Zero has been out for quite a while now and inspiring projects with the Pi Zero pop up everywhere on maker websites. The 5 dollar Pi inspired me (Marcel Brouwers) and Chris Kuipers to start a project …

Restore Missing PIC 12F675 OscCal

“For some unknown reason, the OSCCAL value sometimes gets erased during programming of the chip. Without the OSCCAL value, the PIC will not run at the optimal 4MHz. For most projects, this is not a problem. Some of my PICs …

RS232 - RS485 Converter with Automatic RX - TX Control

“RS232 is one of the most used, easy to develop and easy to apply communication protocol. We generally encounter to this standard at the MCU applications. But it has some restrictions. It allows us to use maximum 15 meters cable …

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.”

Tiny-Dice: Electronic Dice Using an ATtiny2313

“This simple electronic dice is an ideal starter project to introduce youngsters and those still young at heart to the dark arts of microcontrollers and circuit building. We take you step by step through the process. For your troubles you …

5V Symmetrical Regulated Power Supply

“This Project provides Positive and Negative (Dual Output) 5 V @ 1 A Regulated Power Supply.”