Can someone tell me how much current is needed while burning a PIC 16F628. I have scanned a lot of data sheets from Microchip but all that I could find was that the _MCLR/Vpp (4) pin takes insignificant current. Presumably the current is being supplied by the Vdd pin (14), but how much?
I'am a newbe. Just completed my first pic programmer based on a popular parallel port design.
Since I intend to use it for the 16F628 up to now, I've made some changes: Basically I've removed the 7805 and 7812 (or 7808) regulators and the PNP transistors.
Raw dc is 15V.
Vcc for the 7406 is supplied by 220R + 5.1v zener.
Vdd for the PIC is supplied by 560R + 5.1v zener.
Vpp for the PIC is supplied by 10K + 12v zener.
My programmer works fine, but I don't know if I operating in the limits.
I'am a newbe. Just completed my first pic programmer based on a popular parallel port design.
Since I intend to use it for the 16F628 up to now, I've made some changes: Basically I've removed the 7805 and 7812 (or 7808) regulators and the PNP transistors.
Raw dc is 15V.
Vcc for the 7406 is supplied by 220R + 5.1v zener.
Vdd for the PIC is supplied by 560R + 5.1v zener.
Vpp for the PIC is supplied by 10K + 12v zener.
My programmer works fine, but I don't know if I operating in the limits.