LED Voltmeter using IC7107 for Car battery

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vkssingh

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ic7107

I want to construct a LED voltmeter using IC7107 for use in my car dashboard to measure battery voltage. Can someone help me with a suitable circuit? Pls also include power supply for circuit using the car 12 V battery. Thanks.
 

ic 7107

You can get complete information to build what do you want from Intersil ICL7107 datasheet , take a look at :
**broken link removed**
 

diy led voltmeter

This circuit requires +5V and -5V supply ..
Try to use 78L05 voltage regulator to step down +12V (it will take anything from 8 to 30V) to +5V and then ICL7660 or ICL7662 to generate -5V of +5V ..
Data sheets with typical application examples are readily available on the web (GOOGLE) ..

For example:
**broken link removed**

Regards,
IanP
 

led voltmeter

In case you do not have ICL7660, 7662, so just follow the circuit example in the datasheet that uses a CMOS 4069 or 4011 to create the -5VDC, it is good enough since you are measuring the +VDC only.

nguyennam
 

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