Recent content by dyordyen

Thanks guys :)

Oh wait, I'm sorry... I meant, multiplexing multiple analog signals then feeding it to an ADC...

Is it possible? Feasible?

I tried some more modifications. Now, though a little less than theoretical, it outputs something... For better accuracy, I'll try what you suggested... Thanks :)

guys, if any of you have a design or circuit for a voltage controlled current source having a maximum current output of 500mA... no matter how simple or tedious, i would highly appreciate it... honestly I'm next to being desperate :( thanks for the replies though...

attached is the modification i made to the circuit, on the ammeter it reads 490+ mA... but when i try to do it on the breadboard, i get 0 A... pls advice :(

you mean the output terminals? i was thinking of inserting an ammeter on the output side to get the maximum current reading.. +Vout > Ammeter > -Vout > Zener > -Vcc > Ground or you're talking of something else? sorry...

guys, i need some help... i'm looking for a voltage-controlled current source... i found this: http://electronicdesign.com/Articles/ArticleID/9018/9018.html" but when i try it for a maximum current of 500mA (using LM324N for the opamp and 2N2222 for the transistor), it doesn't work...

thanks guys, this forum works like magic... well, strictly-physics speaking, magic don't exist... but not in this case... :)

oh, and one more thing.. how about a variable op-amp current source? when i search the web i only find constant current sources using op-amps... or is there any of the kind? sorry for the "newbie-ness" of mine... :)

thanks very much! so that's why, i used "supply" for searching... should have used "source"... :)

guys, i need some help... is it possible to construct a variable-output current supply using op-amp(s)? if so, can anyone help me about how to construct one? thanks :)