i got some lm386 so id see if those have a good behavior... thanks fo reply
thank you so much jejje ummm but i cant get an op-amp right now stores are close so i need to wait till monday.but maybe a could try this with the lm339 if not i will have to wait till then....thanks again all of you techone, nick gammon and retrolefty..... you guys have help me a lotone doubt 220R its going to ground?
one doubt 220R its going to ground?
look this is an lm339 but i dont undestand it.... for example why the are using a 3k resistor and where does that voltage goes???Uploaded with ImageShack.usalso resistor need tobe that high, or they have tobe changes in oder to input 100mv