Sparky Projects | low resistance without a microhm meter @sparkyprojects | Uploaded April 2019 | Updated October 2024, 1 day ago.
sparky-projects.co.uk
patreon.com/sparkyprojects
In the video i use 10mA, this can be any appropriate current, it's best to use multiples of 10 for easier calculation, and once you work out the relationship of readings, it's easy to just look at the voltmeter, move the decimal point, and get a direct reading.
Keep the current low, you don't want to burn out the trim resistor or the resistor under test.
I was using a 5V power supply, but it's not important (but should be stable), as long as the 'power' doesn't stress the resistors
sparky-projects.co.uk
patreon.com/sparkyprojects
In the video i use 10mA, this can be any appropriate current, it's best to use multiples of 10 for easier calculation, and once you work out the relationship of readings, it's easy to just look at the voltmeter, move the decimal point, and get a direct reading.
Keep the current low, you don't want to burn out the trim resistor or the resistor under test.
I was using a 5V power supply, but it's not important (but should be stable), as long as the 'power' doesn't stress the resistors
