Go Down

Topic: Current sensor (Read 741 times) previous topic - next topic


Hi all,

I'm looking for a low-cost low-current sensor (p.e. 0 - 1A). Sparkfun have one, but i'm looking for a cheaper possibility.
The most I see are for measure big currents up to 20, 30A.

Anyone an idea?



Well low-cost and low-current does not sit well together as you have found. It is hard to detect low current that is why they are expensive. I think you might have to revise the bottom end of that current specification you have. I am not sure if you can beat the Sparkfun one.


If you're willing to do a bit of soldering you can construct your own low-current sensor out of devices like the Zetex ZXCT1009F and a current-sense resistor.

Or you can just use a low-value current-sense resistor (e.g., 0.1 ohms) in series with your signal and measure the voltage across it using an op-amp or instrumentation amplifier.

The Aussie Shield: breakout all 28 pins to quick-connect terminals


@Grumpy_Mike: Yes, i've already invented. But I'll try to search the cheapest one. It's for a project in Macha (Zambia, Africa), so it don't might be expensive.
@RuggedCircuits: Thanks. I try this. A bit soldering isn't a problem.

Thanks for answering.


Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131