piclist 1999\10\31\234738a >
Thread: Voltage Requirements for ICD?
face BY : Dennis Plunkett email (remove spam text)

At 21:40 31/10/99 -0400, you wrote:
>I noticed the Microchip ICD specifies 9 volts to power it.  I also noticed
>that right next to the power jack, however, is a 7805 regulator, so I began
>to wonder if I could run it off a standard 12 volt supply (I've been using
>a 9 volt battery).  Checking the schematic, I see that 9 volts was indeed
>drawn off before the regulator, but I can't find anywhere on the set of
>schematics that actually uses this voltage level.  Has anyone tried running
>an ICD from a standard 12-13 volt supply?
>John Hansen

The 9V is just so that the cheap 7805 has enough headroom for voltage
dropout (Around 2V if I recall, and 7V wall warts are hard to come by,
where as 9 is not). The 12V wall wart will do the job. I don't think that a
heatsink on the regulator is required in this case



See also: www.piclist.com/techref/microchip/devprogs.htm?key=icd
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