Generating 10 mA 12V would require less than 50 mA 5V – not too terrible an added load. The +12 volts isn’t a power supply for HVP, it’s more of a distinct signal to get the chip to change modes. Oh, I’ll also mention that it’s not too difficult to difficult to make a low-current 5V->12V boost converter for this application. Posted in Microcontrollers Tagged atmega, AVR, hackaday.io, high voltage serial programming, hvsp, isp, microcontroller Post navigation A great build, and just what we need to reset the fuses on a few dozen chips we have sitting around. The app to control this programmer does everything you would expect, including all the usual AVRdude commands. For this, is using standard 78xx regulators with an 18V input. Because the High Voltage part of a HVSP operates at 12V, actually providing that voltage needed to be taken into consideration. This chip was chosen because of its built-in USB functionality. Instead of following in the footsteps of the USBtinyISP, is using a PIC18F as the main microcontroller in the programmer. designed his own HVSP that’s less expensive than the Atmel STK500 and has a nice GUI app. Set your fuses wrong, and without a High Voltage Serial Programmer, your chip is bricked. That little six-pin header with MOSIs and MISOs coming out of it will program every AVR you’ll ever come across. The most common way of programming AVR microcontrollers is the In System Programming port.
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