On 06/09/2011 23:59, jim@jpes.com wrote: >> -------- Original Message -------- >> Subject: [EE] Detecting magnetic pulses >> From: David >> Date: Tue, September 06, 2011 3:38 pm >> To: "Microcontroller discussion list - Public." >> >> >> I am building a very simple magnetic pulse circuit, which sends a short >> (1uS) pulse through a coil wrapped round a solid core (using a FET). >> This is a near exact copy of a circuit I was given which needed some rep= air. >> >> What I don't have is the coil & detector circuit which picked up these >> pulses, or a schematic. > > Put a magnetic compass beside the wire and send the pulse. If it is > working, A magnetic field will be set up and cause the compass to > spin. Thanks Jim, this does work. Albeit only at very close distances right now, so I can work from there to try and increase the range with a variety of cores/wire wraps etc. The current is fairly low (9v battery and a 100R resistor) and it is pulsed very quickly. However as tested the board I copied works from a few inches. Just need to tweak my coil/core. Cheers, David --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .