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Q&A voltage indicator

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voltage indicator

aboico on Jul 25, 2012

hi, i need to build a voltage indicator.

when the voltage will be 12V the led to turn green,

if i am lower than that i need the led to be red.

what parts can i use for this purpose?

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0 LucaV

on Jul 25, 2012 9:46 PM over 9 years ago
It looks like you need a couple of comparators. You will have to set them up to control one or the other LED and or turn on a power supply for the LEDs. Let me know if you have specific questions about the parts.

The ADMP356 may be useful

http://www.analog.com/en/special-linear-functions/comparators/adcmp356/products/product.html

Depending on how much current you need a linear regulator or a switching regulator could also be used/ Something like the ADP7104 or ADP2301

http://www.analog.com/en/power-management/linear-regulators/adp7104/products/product.html

http://www.analog.com/en/power-management/switching-regulators-integrated-fet-switches/adp2301/products/product.html
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0 LucaV

on Jul 25, 2012 9:46 PM over 9 years ago
It looks like you need a couple of comparators. You will have to set them up to control one or the other LED and or turn on a power supply for the LEDs. Let me know if you have specific questions about the parts.

The ADMP356 may be useful

http://www.analog.com/en/special-linear-functions/comparators/adcmp356/products/product.html

Depending on how much current you need a linear regulator or a switching regulator could also be used/ Something like the ADP7104 or ADP2301

http://www.analog.com/en/power-management/linear-regulators/adp7104/products/product.html

http://www.analog.com/en/power-management/switching-regulators-integrated-fet-switches/adp2301/products/product.html
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