Paul Beeson
New Member
I built the esr meter in qst April 2014 magazine and having a problem with the led for leaky cap. The problem is there is not enough voltage differential to "trip" the Transistor thereby letting LED to illuminate.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Welcome to ETO, Paul Beeson!Lol well if it is a fool joke then I'm a fool. No its really a project. Everything works with the exception of LED. And it tries to work but just not enough voltage to trip the Transistor "on" ..... The Transistor is not reaching saturation. Sounds simple but the solution is eluding me in this particular schematic . I think the 15k (r19) may be a 150k. But my math could be wrong. Getting 2.24volts at Transistor. But only . 61volts differential. So if any one can help i would seriously appreciate the help.