Long duration timer circuit.

admin April 7, 2010 32 Comments
Description. This timer circuit can be used to switch OFF a particular device after around 35 minutes. The circuit can be used to switch OFF devices like radio, TV, fan, pump etc after a preset time of 35 minutes. Such a circuit can surely save a lot of power. The circuit is based on quad 2 input CMOS IC 4011 (U1).The resistor R1 and capacitor C1 produces the required long time delay. When pushbutton switch S2 is pressed, capacitor...
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Digital Stop Watch

jacky October 16, 2018 73 Comments
Make a Digital Stop Watch A digital stopwatch is an evergreen project, it can be done at any time no matter how our advanced our world’s technology is because nothing else can replace a stopwatch. And also this is a suitable hobby project for newbies. This is a simple p[roject which doesn’t require much expertise or components. The list of components for this project include; IC LM555 – 1 nos IC MM74C926 – 1 nos Resistors of various resistance...
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