Archives: Projects

Opto-Isolated 4-Channel Triac Board (R) is used for fast switching applications.  Ideal for switching mains circuits, lights, appliances and small load.  Each circuit is effectively isolated with opto-isolators on each channel, TTL inputs control each channel. Trigger input 2-12...

  Atmega8 Development Board provides a very simple and cost effective platform for prototyping solution.  The compact design provides connection to all the pins of the microcontroller for the user. Prototyping solution available for 28-pin ATmega series AVR...

I started playing with electronics back when I was 10 years old in Argentina, where I grew up. Then I got my ham radio operator license when I was 16 years old and I was very active in the ham club and on the air. It was then when I built my first vacuum tube transmitter and refurbished...

89C2051 Development Stick kit offers an easy way of interfacing 89C2051 compatible MCU's. Slim design with plug in type approach Voltage regulator on board for stable and regulated supply to the MCU RESET switch for resetting the MCU 0592 MHz Crystal 4K external...

This simple A2D (Analog to Digital) Converter Board can log upto 8 channel of analog signal with 8 bit resolution.  This board uses the  ADC0808 chip from National Semiconductor. Two standard box type header connector for easy connection of the board to various development...

This project is not completely new. In fact, the oscillator is made from the same schematic as in one of my previous projects and only the frequency counter is made with different schematic. After I finished the oscillator, I made some minor changes in the square signal part of the...

0 - 20V LED Voltmeter kit displays the voltage of the source using 20 LED's.  This projects  is based on the famous LM3914 IC from National Semiconductor. Power Supply Input: 5 VDC Max @ 30 mA in DOT mode and 300 mA in BAR mode Specifications Output: 20 LED's Range...

I “rebuild” my Geiger counter, the SBM-20 tube was initially inside the box, so, i have put this one inside a 32mm diam plastic tube, for more convenience, wired through a XLR3 cable. The LCD display alternatively, the “count per minutes” and result on: milli Sievert/year...