Comments on: ULN2003 High Voltage and High Current Darlington Transistor Array https://electrosome.com/uln2003-high-voltage-current-driver/ You Inspire.....We Create..... Thu, 04 May 2017 11:32:00 +0000 hourly 1 https://wordpress.org/?v=6.1.1 By: Rajender Negi https://electrosome.com/uln2003-high-voltage-current-driver/#comments/6771 Thu, 04 May 2017 11:32:00 +0000 https://electrosome.com/?p=4889#comment-6771 can we run relay system without uln 2003 ?

]]> By: Ligo George https://electrosome.com/uln2003-high-voltage-current-driver/#comments/6246 Sat, 27 Aug 2016 06:57:00 +0000 https://electrosome.com/?p=4889#comment-6246 In reply to Ajay.

It seems like there is some logic mistake in your experiment. You won’t get any current on the ULN output pins unless there is some load to sink that current.

]]> By: Ajay https://electrosome.com/uln2003-high-voltage-current-driver/#comments/6163 Fri, 17 Jun 2016 06:38:00 +0000 https://electrosome.com/?p=4889#comment-6163 Hey @Ligo , I’m using rechargeable battery….. but it is able to give 2.5ma…. but I want 10ma….. i used uln2003, but I didn’t get current at 16th pin of uln2003….. help

]]> By: Ligo George https://electrosome.com/uln2003-high-voltage-current-driver/#comments/5418 Sat, 03 Oct 2015 09:52:00 +0000 https://electrosome.com/?p=4889#comment-5418 In reply to arvind.

500mA means, max current driving capacity.

Let me know how did you measure the current.

It will provide only the current required for the load, by following ohms low. I = V/R.

]]> By: arvind https://electrosome.com/uln2003-high-voltage-current-driver/#comments/5319 Sat, 12 Sep 2015 11:32:00 +0000 https://electrosome.com/?p=4889#comment-5319 I bought uln2003a circuit from you people, at the time of testing at gave 4 milli amps, i was expecting 500 milli amps, please tell the exact way of getting the exact current . I may have mistaken.

]]> By: Ligo George https://electrosome.com/uln2003-high-voltage-current-driver/#comments/1530 Sat, 20 Jul 2013 16:03:00 +0000 https://electrosome.com/?p=4889#comment-1530 In reply to Susan Nguyen.

That circuit is not drawn by me.. it is copied from YOUW ANG ELECTRONICS CO.LTD s datasheet.. It may be their mistake… Different manufactures provides different internal diagrams…. I found that most of the datasheets connects diode in the way you pointed… Characteristics of components from different manufacturers are different…. Note : Cut in voltage of every diode is not 0.7V.. it depends… any way I will correct that circuit. .Thank you..

]]> By: Susan Nguyen https://electrosome.com/uln2003-high-voltage-current-driver/#comments/1529 Sat, 20 Jul 2013 13:04:00 +0000 https://electrosome.com/?p=4889#comment-1529 There’s a small mistake in your drawing, the diode at the bottom is shown reversed. If it was as shown, it would clamp the input to 0.7V and the darlinhgton pair could never turn on…

Sue

]]> By: Ligo George https://electrosome.com/uln2003-high-voltage-current-driver/#comments/1329 Wed, 15 May 2013 09:14:00 +0000 https://electrosome.com/?p=4889#comment-1329 In reply to pra.

Yes…… it is better to provide a heat sink..

]]> By: pra https://electrosome.com/uln2003-high-voltage-current-driver/#comments/1327 Wed, 15 May 2013 08:45:00 +0000 https://electrosome.com/?p=4889#comment-1327 sir ,all pin can sink 500×8 ma at one time.

]]> By: Ligo George https://electrosome.com/uln2003-high-voltage-current-driver/#comments/1325 Wed, 15 May 2013 08:33:00 +0000 https://electrosome.com/?p=4889#comment-1325 In reply to pra.

Yes of course.. Note that ULN driver can only sink current.. cannot source..

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