DIY Gas Sensor Monitoring System

Thread Starter

rubberbus

Joined Sep 27, 2012
13
hi guys, I have a question.

can I use the UA741CP OP AMP to work with photodiode ?

I tried and it didnt amplifier the output voltage.
 

alfacliff

Joined Dec 13, 2013
2,458
a possible chooice for the valves, if you dont have access to an industrial supply house, try using the valve body for a washing machine. two valves, solenoid controlled.
 
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