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|-----------------ISP
|
Vcc<----[10k-47kpull-up]----|------[mega Reset PIN]
|
\
|-----[GND]
betwixt said:Note that you need a special crimping tool to attach wires to the socket (the plastic shell), I have seen MANY disasters caused by people using pliers or soldering the wires to the terminals.
This part always remained a confusing part for me....I can see you might have one problem though. The variable resistors might have to be increased in value or better still, have fixed resistors wired in series with them.
The reason: go back to the formula for calculating the 338 output voltage and calculate it with the resistor set to maximum value. The bottom resistor in the divider will be the 2.4K and 5K in parallel making about 1.6K which will give an output voltage of 10.3V. This is the maximum, you can reduce it DOWN to about 2V but not make it any higher.
[From uC]------|>---[10k]---|---[Q_base]
|
|---[100k]---[GND]
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