Alan B. Pearce wrote:
>> Hint: if you have only two wires, and these wires must carry power and
>> data, how could you encode the data on top of the power, and how can the
>> PIC decode this data?
>>     
>
> Surely this would require a minimum of 2 extra components at the PIC, a 
> diode and a capacitor, so one can do a "one wire" type communication, while 
> having a capacitor to supply enough power to the PIC, and the diode to 
> isolate the capacitor from the "data" line while it is low.
>
> I have a vision of some poor lackey in an Asian back room attempting to 
> reverse a Wouter designed system that is reprogramming the PIC using a "one 
> wire ZPL", and trying to figure out how it is done. 
>
>   
I have been intrigued about using an IR diode emitter/rcvr pair as a 
bootloader tool.

--Bob
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