Op amp ammeter

123

01:37:24

A simple little ammeter that uses op amps to display amperage. The LEDs turn on at 1 amp, 2 amps, 3 amps, and 4 amps. I am going to do some more work on the circuit soon.

published 8 years ago

Issacsutt

8 years ago

I don't think this is an ammeter. Sure it can show it increasing and decreasing like a voltage detector, but that doesn't quantify it

BillyT

8 years ago

Most basic ampmeters measure the voltage dropped across a shunt resistor when a current flows through it, this circuit then qualifies. Not very linear but still it qualifies.

uraniumhexoflorite1

8 years ago

Issacsutt brings up a good point. I am going to work on making the lights be more meaningful instead of just being 1/4 or 1/2 of a certain current.

uraniumhexoflorite1

8 years ago

Currently this circuit is more of a proof of concept than anything else. I'm going to work on fine tuning the components so that the LEDs are more significant such as 1 LED=1 Amp.

Issacsutt

8 years ago

How about instead... What if you designed such a circuit that could detect it in increments od 1/10th of a volt, 1 volt, and 10's of volts, then add them together? For example, since about 1st grade we all learned that numbers had place values, and that you could add them together to form that number like this: 123=100+20+3. Then you could convert it to count those increments and add them all together to read the voltage and show it on 7 segment displays.

uraniumhexoflorite1

8 years ago

So essentially a circuit equivelant of the modulo function. I will definitely look into it.

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