Archives: Projects

  This project is a Colpitts Crystal Oscillator Description Firstly, I suggest you to read the article in ARRL Handbook 2015, Chapter 9 - Oscillator Circuits and construction. Then saw a video showing the construction of the Colpitts Crystal Oscillator (with Buffer stage)...

This USB to serial converter project is easy to build, it is simple and inexpensive. It is based on theFT230XS from FTDI Chip. Description The FT230XS is outfitted in SSOP-16 packaging. The first incarnation of FT230X chips got a nasty bug when the chip inadvertently goes into...

This project is an one Channel Relay Driver suitable for a variety of projects. Description Single Channel Relay project  is a simple and convenient way to interface a relay for switching application in your project. Specifications: Input - 12 VDC @ 42 mA Output - SPDT...

This project is a general purpose 8 Channel Relay Board. Description 8 Channel Relay Board is a simple and convenient way to interface 8 relays for switching application in your project. Input voltage level support TTL as well as CMOS. Easy interface with Microcontrollers based...

Description This circuit is based on CMOS CD4013 Flip Flop IC. It 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. Relay switch...

Features LED matrix display 40x7; Display of clock, calendar, inside and outside temperature, custom text massages; Automatic Daylight Savings Time; Capability of keep the real time clock works correctly for more than one week without power supply. Clock automatic...

    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. Description The PL2303SA chip is not required an external crystal as the internal clock oscillator is...

  This is a simple USB to RS485 bus adapter. The adapter is designed using a FTDI basic UART chip (FT230XS) and an inexpensive TI differential receiver (SN75176) Description While developing the Luma RS485-networked LED driver we discovered a need for a small and inexpensive...