I've seen the charge transfer method before but never understood it, could
you elaborate on this please?

Sean


At 03:40 PM 11/18/97 -0500, you wrote:
>Depends what you are measuring. It assumes that the voltage
>being measured is higher that the switch voltage of the
>16F84 port. The errors can be significant. You can
>use a charge transfer scheme's with two I/O pins
>two resistors and a small not critical filter cap. The software
>takes longer to execute but is simpler to write.
>
>Walter Banks
>
>
>> I need to design the cheapest A/D converter using 16F84. I'm thinking
>> in just a resistor and a capacitor, and measure the charge time.
>> The input voltage will be from 0 to 5V and 6 bits of resolution is
>enought.
>> Any ideas?
>
+--------------------------------+
| Sean Breheny                   |
| Amateur Radio Callsign: KA3YXM |
| Electrical Engineering Student |
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