1-99 minutes 2-digit time counter 12v

Thread Starter

speebman

Joined Jun 22, 2016
9
hello everybody
for my project i need to make a minute counter 2-digit display to work with 12V input
it just needs to start counting up the minutes from the moment it got power
and after power goes off, and on again, it will start counting from the beginning

i couldn't find any complete board without a relay attached to it
i dont need any relay, just to know how many minutes did it pass from the time it got power
if you can direct me to a site were can i buy a made board it will be great
if not, i can build one with your help


thank
danny
 

crutschow

Joined Mar 14, 2008
34,285
You could buy a kitchen timer that counts up or down (I have one I bought at Bed, Bath & Beyond) and hack into the switches to reset it and start counting upon power up.
A couple of transistors and a few resistors and capacitors should be able to do that.
 
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