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here is the single sided PCB and easily available components. working good.
Yes. These problems come up.
the issues are listed either in read me file or trouble shooting of the pickit2 user guide.
the number of caps used on target board wont allow the Vdd to raise in time wrt Vpp
Secondly, if the Pgdata and pgclk pins are also used in target, we need to use them only after a resistor of specific value in series. The ICSP should be before that se resistors.
Little reading of pre conditions for use as icsp would reveal the and you can solve.
All the best Ragens
1. if the smd op amp is planned you can use6420, otherwise with dip8 versions, we used either MCP6271, MCP6281 or MCP601For FDC6420C replacing,
IRLML6402 is ok for P and Si 2302CDS is ok for N ?
Also what is the reason of D4 (1N5819) ?
Thank you!
si2302CDS appears to be ok, higher current capability, provided it is not too costly.
in the absence of D4, any external voltage could reach out to usb on its pin1 (Vusb) getting path thro' internal diodes of the FET devices. D4, i suppose, prevents that.