Posts tagged ‘Constant Current’

Constant Current Dummy Load In an HDD Cooler

Basic constant current dummy load using an Op Amp and a by-passing MOSFET is very easy to build and had been made quite popular following Dave’s video on EEVBlog. I happened to have an old aluminum hard disk cooler case collecting dust. The die-cast aluminum case is relatively thick, making it an excellent heat sink. So I thought why not use it to build a dummy load myself? Continue reading ‘Constant Current Dummy Load In an HDD Cooler’ »

Accurate Milliohm Measurement

Most of the multimeters do not offer resistance measurement in the milliohm range. In most meters a typically Ohm range has an accuracy of 0.1 ohm and is too coarse for measuring small resistance. Of course, some of the high-end multimeters have milliohm range and there are also dedicated micro ohmmeters for even more accurate small resistance measurements, but most of them are priced way out of the range for personal use. Continue reading ‘Accurate Milliohm Measurement’ »