3 Results for "Reverse Engineering Blood Glucose Monitors"

Can anyone tell me what R4 is for in this circuit?
.Stack entry by Peter Walsh
Can anyone tell me what R4 (1 ohm, 5 watt) does in the linked schematic? It's a mystery to me. The circuit is an ultrasonic power supply from eBay, part of my 2015 Hackaday prize project. https://hackaday.io/project/4689-improve-the-bosch-haber-process/log/16375-reverse-engineering-a-cheap-ebay-ultrasonic-power-supply...

"Transceiver of all trades" using ARMs such as PogoPlug / lirc_rpi to receive, join and emulate all infrared and radio remote controls
.Stack entry by TEN
Integrating IR 38(-56)kHz + AM 433 MHz + 868 MHz (+ 915 MHz in jurisdictions that have made this an ISM band too) + 2.4 GHz OQPSK remote controls preferably within one instance of LIRC on a headless 2W board.See also http://dangerousprototypes.com/forum/viewtopic.php?t=431#p3702...

High (110) voltage DC motor driver with PWM / direction inputs for cheap.
.Stack entry by James Newton
Hey, anyone have advice on driving high voltage brushed DC motors? E.g. treadmill motors or the lovely old ones that last forever if you change the brushes out? They are available for dirt (I got 3 for $15 each! Working!) and yes, I know the new BLDC...