Adapting LM3914 Bargraph Circuit to Measure 150V

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#1 21660227 04 Dec 2011 13:34

Sarah Fincham Sarah Fincham

Anonymous
Post #1
21660227 04 Dec 2011 13:34

Hi, as a newbie hobbyist to electronics i am having difficulty working out how to adapt a bargraph circuit using LM3194 (see attached image) the circuit is for measuring 400v. i need to make it measure the entire range from 150v to 300v. could someone shine some light on this for me please.
or is the wrong type of chip to use ?
thanks in advance
Sarah.

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#2 21660228 07 Dec 2011 02:29

EEWeb EEWeb

Anonymous

Post #2
21660228 07 Dec 2011 02:29

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#3 21660229 07 Dec 2011 18:09

Sarah Fincham Sarah Fincham

Anonymous

Post #3
21660229 07 Dec 2011 18:09

thank you for the reply, i found a little program that works out the values for voltage dividers, and by using just 2 resistors i can get the 5v max required for the entire range 150v-300v
I just need to find the time to try it
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Adapting LM3914 Bargraph Circuit to Measure 150V–300V Voltage Range

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