Suggest that if you measure the voltage drop directly on the resistor terminals instead though the wires you'd get a more close value to 0.07 ohm. When dealing with milliOhms every piece of wire add counts!
@bingbongabinga2954
5 жыл бұрын
Thats a DC shunt, right?
@rogeriocarvalhodossantos3525
2 жыл бұрын
Forgot the resistance of the soldered wires that changes the value
@irgski
4 жыл бұрын
Cool, simple design that works! A couple things: 1) How sensitive is the 100mA output to voltage change at the input (5V)? 2) Next time, align the trimpot adjustment with a hole in the lid so you can calibrate it with the lid attached. Also, maybe add a "Power ON" LED to the input voltage side.
@karlmartell9279
3 ай бұрын
What did he smoke? Good stuff!
@ΠάριςΑζής
4 жыл бұрын
Yes, nice, simple and useful test jig indeed. I use the same method for years now, using my bench power supply, setting the output voltage usually to 2 Volt and the current (depending on the case) either to 100mA or to 1A. The 1A setting has the advantage of direct millivolts to milliohms reading and is more reliable for testing power switches or evaluating resistances of safety ground (grounding lines to ground bar). Besides there is no need to shift the decimal point of the multimeter’s indication by one digit to the right. This is needed only when using the 100mA setting. Another advantage of this setup is that it doesn’t draw any current from the power supply when not connected on a resistor for testing it and the instrument simply shows the open circuit voltage of the power supply...
@ZulhamS
2 жыл бұрын
future is nano and pico,,,,, eyelesss
@vikashkumar-gn7gh
2 жыл бұрын
Simple way to make milioms miter, Its helpful to find shorting in any electronics board.
@hullinstruments
3 жыл бұрын
Very cool attachment! I purchased one of the “half home“ multi meter adapters. It’s about $20 and converts your multimeter into a 0.1 precision milliohmeter. It works really well and seems to be as accurate as most of my lab equipment. I love your project and I would have much rather built something DIY, but I didn’t have the time and that was a good well-developed and accurate product cheap… also, it’s very small and portable with a coin cell battery so you just plug it into your multimeter if you’re in the field doing a repair… And boom you got an instant milliohmeter without carrying an extra device. End it has a built-in 0.1% 10 milliohm calibration resistor
@truonghan4327
Жыл бұрын
Im from vietnam . thank's . i like video 👍
@jacka.4774
3 жыл бұрын
I want to be able to measure Nano OHMs what do you suggest Peepaw?
Пікірлер: 17