On Thu, 2 Nov 2000, Doug Sutherland wrote: > 2) I am taking a serious look at a charging system > that would allow me to charge while running the > system. I want my wearable to operate like a > laptop, plug it in and it charges. I also want > to be able to monitor the voltages, eventually > tweak the linux APM bios to read that info. I > have found someone willing to cook something > up for me, but it's not a guarantee yet so I > will update you on that when it materializes. Doug, you may wish to check out the power supply at www.mpja.com (ASTEC LAPTOP SUPPLY). I have used several myself, and they work fine. http://www.mpja.com/1-ac-dc-power-supply.htm Specs are below: notice some handy features like the inline charging, digital outputs for some useful states, a digital as well as wired input for shutdown, and so forth. You can use any voltage source with it and get the +/-5, +/-12 out but the onboard charging (which I have not tried) works only with Ni-Cads. This supply is 14.95 USD and well worth it! The only hassle in using this as a general-purpose supply is the input range (11-16V) is not wide. Couple Notes: - The digital outputs can't source meaningful current (must buffer before feeding to an LED, for example) - On mine, the +- battery input wires are color-swapped (red = -, black = +) however the pin #s and silkscreened +- are still correct. In other words, if you ignore the wire colors for the battery input there is nothing amiss. -- cut here -- ASTEC LAPTOP SUPPLY MFG: ASTEC P/N: AA90304 Input AC Adapter: 18V DC +-.5V Input Ni-Cad Battery: 11-16V Output #1: 5V @ 3.5A #2: +12V @ 1.1A #3: -12V @ 40mA #4:-26V @ 40mA #5: -5V @ 40mA Inputs for AC adapter & Ni-Cad battery. 3 way charger provides 11-16V @ 1.7-2A (Rapid), .5-.7A (Quick), 50mA-150mA (Trickle). 2 battery temp. sense leads. Logic outputs: POK (outputs in reg.), Bat. L1 (Hi when battery <11.75V), Bat. L2 (Hi when battery <11.30V), Bat. in Use, Bat. Full. Logic inputs: Power Disable (Hi turns off converter) Sw1 & 2 low level signal used to control converter. L: 4-3/4" W: 1-3/4" H: 3/4" WT: .25 -- cut here -- Don P http://aeinnovations.com
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