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Peter's DIY electronic projects

8-channel I2C relay module

8-channel I2C module8-channel relay board for Raspberry Pi and Arduino
You can directly connect this relay board to the Raspberry Pi or Arduino using just four wires

First steps with the PIC32 Ethernet Starter Kit

PIC32 Ethernet Starter Kit Add ethernet connectivity your projects, get started with the Microchip Ethernet Starter Kit quickly. This guide shows how to setup the MPLABX development environment for compiling PIC32 source code and the TCP/IP stack.

Remote control - build your own

remote controlControl up to 8 devices by this easy constructable remote control. It can work as a radio or infrared remote control, depending on the components. Each device output can be configured to be momentary (turned on while you press the button) or latched.

Latched outputs can be toggled on/off by one button per channel, or turned on and off by two buttons per channel.

Learning remote control receiver

Take your existing remote control and control everything with it. This receiver can learn codes from an RC-5 or NEC format IR remote control, and associate the buttons to different channels and actions.

2^16 remote control encoder and decoder

Control up to 16 remote digital output lines by this remote control encoder/decoder. The encoder can transmit either using a radio module or an infrared LED. The decoder outputs can be latched or momentary

Combination lock

combination lock
Operate your gate or something different by this simple electronic combination lock. The combination can have a chosen length of numbers or alphabets, and can be changed any time. The LCD display is optional, the circuit works fine without it. After entering the correct combination, a relay is operated for the predefined time.

USB digital I/O extender

USB digital I/O
Add general purpose input/output lines to your computer based or openwrt projects! You can control 12 digital input/output lines from USB port using this circuit. Each line can be individually set to an input or output, and each output pin can be set HIGH or LOW independently, without changing other output pin states.

LCD thermometer

Build your own temperature meter for fun. This project uses the Microchip TC77 digital temperature sensor, a PIC16F871 microcontroller and a 7-segment 3½ digit LCD. You can study the source code on how to drive an LCD display.

Lights timer

Automatically turn off the lights after 10 minutes. If you often forget to turn off the lights outside or at different places in the house, this circuit can be practical for you. It can control two independent light switches with different turn off times. Press the button once and the light turns on for the preset time. Press again, and the light remains on forever. Press for the third time, and the light turns off.

Computer controlled infrared remote control transmitter

Control all your devices from the PC. This infrared remote control transmitter can be controlled from a computer. It speaks many different remote control formats, like the Philips RC-5 standard and can be tailored to other specific types.

Period timer for aquarium, sprinklers and more

Turn on the sprinkler or the aquarium lighting for the same period of the day. You can choose to operate the output by every 2nd, 3rd, ... day only. There is a manual start/stop button to immediately turn on or off the output, and a disable button to completely turn off automatic operation.

Serial LCD for microcontrollers using only 3 pins

serial LCD
Connect an LCD to your microcontroller to make it easy to develop and debug your application. You can choose which PIC I/O pins you want to use for the interface, and any HD44780 compatible LCD can be controlled.

Connect your microcontrollers into a network

PBUSConnect your PIC devices on a shared network, and they can communicate to each other and share information. You can control them all by any unit on the network.

get started with PIC microcontrollers

Are you new to microcontrollers? Microchip 8-bit PIC microcontrollers are cheap and easy to start with. You can find them in many size starting at 6 pins. Most parts contain FLASH program memory, so they can be programmed hundred times. A good choice to start with is the 40-pin PIC16F887, or the 18-pin PIC16F628A/PIC16F818. They contain integrated serial interface, timers, PWM module, AD converter and separate EEPROM to store your own data.

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