Part 3 in the Precision Current Source series. Dave breadboards a classic precision low current source circuit using the 10V REF102 voltage reference to generate accurate 1mA and 1uA currents. Also some talk about the errors in a typical precision circuit like this. Part 2 HERE Part 1 HERE REF102 …

Dave hates products with built in charging that don’t use a standard Micro USB connector. In this case the Panasonic Lumix LF1 with its stupid proprietary connector. Why in this day and age of attempted standardisation are companies still doing this? Dave also shows off a good example, the Sony …

Part 1 HERE Dave gets his precision 1A current source circuit working on a breadboard. LTC6655 VPR221Z Precision 4-terminal Z-Foil resistor from Vishay LTC6655 Voltage Reference OPA376 Podcast: Download

A quick look at Dave’s Advantest R6142 Voltage and Current Source. Can it be used as a current reference for the uCurrent? A look at the stability with temperature and time, and absolute calibration of the unit. Is it an ebay score, or ebay junk? Forum HERE Podcast: Download

Phil VK2BDF from the Manly Warringah HAM Radio Society shows off his 1970’s vintage home made 200MHz DIY spectrum analyser. Forum: http://www.eevblog.com/forum/blog/eevblog-575-diy-1970s-spectrum-analyser/ Podcast: Download