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 .: Build your own Lab Power Supply
 

 

 

Build a high quality power supply with a continuously variable stabilized output adjustable at any value between 0 and 30VDC. The circuit incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of 3A. more

 
 .: Breadboard header for ATTiny 25/45/85
 

 

 

This handy breadboard header for ATTiny 25/45/85 microcontroller is a new design based on the original idea from Tinkerlog. Maybe the most useful feature is that it can provide power to the vertical breadboard strips while connecting all six port pins to the horizontal strips. more


 .: iButton electronic lock
 

 

 

In this project we will use iButton as a key to an electronic lock. This electronic lock can use many different kinds of iButtons and can store up to 9 different keys. One of the keys is the master key and is permanent stored in memory. With the use of master key we can add or remove slave keys. more


 .: Tiny audio amplifier using LM386
 

 

 

This Tiny Audio Amplifier is a good choice for battery operation audio amplifier.  It is based on LM386 IC. Power supply - 6 - 12 VDC, Output power - 1 W, 8 Ohm, The quiescent power drain is only 24 mW when operating from 6 VDC, Self-centering output quiescent voltage, Onboard PRESET to adjust volume  more


 .: Programmable Home Security Alarm System
 

 

 

In this project we design low cost high performance programmable home security system using few LDR's as an input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF generator) and activate the high power audio alarm and lights. more


 .: Voltmeter + Ammeter LCD panel
 

 

 

This multimeter panel was designed to measure output voltage and current in a PSU. It needs only one supply voltage that can be acquired from main PSU. An additional function of the multimeter is that it can control (switch on and off) an electric fan. more

 
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