0-24ma current source - Electronic Circuits Projects Diagrams Free

ray madayag · 2nd February 2004, 07:24 AM

I am looking for a circuit that will allow me to simulate a 0-24mA current.

Phasor · 2nd February 2004, 07:34 AM

Do you need to source or sink current? Or have the option of either?

Ali Sajjad · 2nd February 2004, 10:20 AM

Do u want this for simulating 4-20mA instruments ????.. which normally operate on 24Vdc, and have 250 ohm resistance ??? if this the case.. i can help u... id u want this for other purpose.. please let us know the details..

- Ali Sajjad

ray madayag · 3rd February 2004, 06:03 AM

thanks guys for your prompt infos, i will be using this to simulate flow and pressure sensors having a 4-20mA output. We do have instruments to do this but i'd rather have one that is handy. Again thank you so much for your support.

Ali Sajjad · 3rd February 2004, 05:07 PM

Thats it.. i have worked a lot with such instruments..... soon i will be back with sometyhing for u

-Ali Sajjad

panic mode · 3rd February 2004, 06:36 PM

A while ago I created one. You can download it here
http://forum.mrplc.com/index.php?act...CODE=02&id=149

Ali Sajjad · 4th February 2004, 01:13 PM

Here is a simple one.. .. and tested

The 1k pot sets the output current (3.8 to 21 mA).

- Ali Sajjad

panic mode · 4th February 2004, 03:07 PM

I like it. Note that 1k resistor should be 1Watt and the 1k pot
should be wirewound. It would be better to use PNP circuit so
that separate power source is only optional instead of required
(just about all electrical cabinets are already equiped with 24VDC
power supply, so you only need pair of aligators).

Ali Sajjad · 4th February 2004, 04:56 PM

Quote:

Originally Posted by panic mode

I like it. Note that 1k resistor should be 1Watt and the 1k pot
should be wirewound. It would be better to use PNP circuit so
that separate power source is only optional instead of required
(just about all electrical cabinets are already equiped with 24VDC
power supply, so you only need pair of aligators).

Yes this may be modified as panic told for use with the 24VDC available in all instrument contol and marshalling cabinets..

- Ali Sajjad

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2nd February 2004, 07:24 AM	(permalink)
ray madayag	0-24ma current source I am looking for a circuit that will allow me to simulate a 0-24mA current. __________________ ray madayag halliburton energy services box 3474 al-khobar 31952 saudi arabia

2nd February 2004, 07:34 AM	(permalink)
Phasor	Do you need to source or sink current? Or have the option of either?

2nd February 2004, 10:20 AM	(permalink)
Ali Sajjad	Do u want this for simulating 4-20mA instruments ????.. which normally operate on 24Vdc, and have 250 ohm resistance ??? if this the case.. i can help u... id u want this for other purpose.. please let us know the details.. - Ali Sajjad

3rd February 2004, 06:03 AM	(permalink)
ray madayag	thanks guys for your prompt infos, i will be using this to simulate flow and pressure sensors having a 4-20mA output. We do have instruments to do this but i'd rather have one that is handy. Again thank you so much for your support.

3rd February 2004, 05:07 PM	(permalink)
Ali Sajjad	Thats it.. i have worked a lot with such instruments..... soon i will be back with sometyhing for u -Ali Sajjad

3rd February 2004, 06:36 PM	(permalink)
panic mode	A while ago I created one. You can download it here http://forum.mrplc.com/index.php?act...CODE=02&id=149

4th February 2004, 03:07 PM	(permalink)
panic mode	I like it. Note that 1k resistor should be 1Watt and the 1k pot should be wirewound. It would be better to use PNP circuit so that separate power source is only optional instead of required (just about all electrical cabinets are already equiped with 24VDC power supply, so you only need pair of aligators).