modified 11 years ago

Drain current generator

01:38:31

Thank to @Hurz this works:
is a current generator with the range 5÷20mA that you can select shifting the position of the potentiometer

published 11 years ago

Shrey_Doshi

11 years ago

Why r u only dependent on hurz? Lol:)

hurz

11 years ago

Its a phantasie circuit, right? Anyway i have some time to help. Move first ground to a common place e.g. at negative side of your 24V supply. The collector resistor get 24V instead. Then change the output config of the opamp to a positive max out.

hurz

11 years ago

You really want it this way upside down? Ok, just do a little Everycircuit hack and change the output config to "Min output" -10MV, yes Mega Volt!!!

thebugger

11 years ago

This circuit is never gonna work as it is. I don't even know what it should be. Is it an amplifier an oscillator or a regulator. It has some features from all but i don't see it as a functional unit yet. Give more info what you need it to be. Help us help you :D

lelox93

11 years ago

@ Shrey : becausr hurz is the winner if the game is everycircuit, he's got skills!

lelox93

11 years ago

Hurz now works! I'm very thankful.

lelox93

11 years ago

this circuit should be a current generator holded by a zener Vref.. an exercise of the book

lelox93

11 years ago

The current generator should drain variable current 5÷20 mA whit the variation of the wiper position of potentiometer

hamilton1300

11 years ago

This could be used in an instrument application. Ours very common for instrumentation to use 4 to 20 m amps on valve positioners

thebugger

11 years ago

That's not a current generator. The draw increases when you decrease the resistance. This is completely normal. You can skip the whole circuit altogether just place a potentiometer as a rheostat and it's the same deal

hurz

11 years ago

Buggzy, first never ever say "never"! This circuit is a linear regulator seen at emitter, and with constant load seen from collector side a constant current source/drain. If you have questions how it works do not hesitate to ask us all, but stopp being rude and Lelox93 might write you some descriptions.

lelox93

11 years ago

@Hurz u right i'm sorry, i'll do it

Shrey_Doshi

11 years ago

Agreed @lelox93.:)

jose1979

11 years ago

anyone know everything. life is constantly learning. of course your circuits are within the logic.

julien77777

11 years ago

tiresome

julien77777

11 years ago

amuses her to say I made the shit! I did not think that an English like you whom I admire door could be so stupid. plus you made interesting circuit! revenge !!!!

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