Convert a webcam to infrared

This is a very simple project and it doesn't require a circuit board to be made. We are going to convert a cheap web camera to an infrared camera, capable of viewing in the dark. You can use the IR camera for to a home security system (surveillance system). The only thing you need is a infrared light source witch is invisible to the naked eye. But this is the subject of another project!

BasAVRa LiTe

BasAVRa LiTe is an alternative programming board for the famous Basic Stamp II by Parallax (OEM version). We have already see how to make our own homemade Basic stamp 2 board of education using the OEM chip, in the article BS2 programming board. BasAVRa LiTe goes one step further by replacing the wired serial connection with a wireless Bluetooth to serial connection. With BasAVRa LiTe you can program and control Basic Stamp 2 from your computer without using wires and from great distance (e.g. from the next room).

RS232 to TTL level converter

Perhaps this is the most famous RS232 to TTL level converter. When launched by MAXIM, it become so popular that several clones acquired as the years went by. This project shows how it is possible to implement a small module to interact easily with devices which support the asynchronous serial interface (TTL levels).

IR remote control tester circuit

This is a simple and small circuit you can build in order to test infrared remote controls, coming from audio and video devices (e.g. television, DVDs, VCRs and more). You can also use it to test devices which are using the famous IrDA protocol.

In circuit AVR programmer (ISP)

Perhaps this circuit is the simplest AVR programmer you can build. Its great advantage is the ability to program almost any AVR microcontroller, without the need to remove it from the circuit in which is connected (in circuit programming).

PIC16F876/3 adaptor for the simple PIC programmer

This adaptor extends the possibilities of the simple PIC programmer, to be able to program PIC micros like PIC16F876, PIC16F876A, PIC16F873 and PIC16F873A. Simply connect it to the main board.

A simple programmer for PIC microcontrollers

Perhaps this circuit is the simplest programmer for PIC microcontrollers you can build. It is connected to serial port of your PC and it has a very similar design with the SI-Prog programmer for the AVR microcontrollers. With the help of adaptors you can extend the possibilities and program more PIC microcontrollers.

Simple pulse generator with accurate frequency 1Hz

This circuit is ideal for clocks and anything that has to do with time measurement. The output pulse comes every one second with great accuracy (without being affected by environmental interferences or time). Its accuracy is based on a quartz crystal oscillator, which guaranties that your clock will not desynchronize.

R/2R ladder DAC

This is a famous digital to analog converter that uses a resistor ladder network in order to convert the signal from digital to analog. It has 8bit resolution, but you can easily increase it, if you follow the pattern. The circuit is very reliable and it doesn't require a lot of time to build it.

Serial ADC for BS2

Connect National's Semiconductors serial analog to digital converter ADC0831 to Basic Stamp 2 and digitize your analog data. The required program couldn't be simpler (literally only 3 commands).