Arduino based AVR High Voltage Programmer. Update 0. 10. 20. A PCB version of this circuit is in the design stages some preliminary information is here. PIC usually pronounced as pick is a family of microcontrollers made by Microchip Technology, derived from the PIC1650 originally developed by General Instruments. This page provides circuit and software for hobbyists to practice learningbydoing, build a simple microcontroller projects. If you would like to participate, please. Update 0. 31. 10. Kits based on this design are now for sale Update 1. The original AVR HV Rescue Shield kit has been replaced by the new and improved HV Rescue Shield 2. Visit the HV Rescue Shield 2 product page for information about the new kit As I mentioned earlier this week, I recently lost an ATmega. RESET pin, without realizing that this makes the device impossible to reflash with SPI. This is particularly frustrating because the device is still 1. The only way to recover the device is using what Atmel calls High Voltage Parallel Programming Mode which very few programmers support, most importantly, not the USBtiny. ISP I otherwise love. Fortunately, my trusty Arduino came to the rescue I created an Arduino based AVR programmer that uses the high voltage programming mode and can fix pesky fuses like RSTDISBL. The Arduino has just enough IO to implement the entire HV protocol plus a go button. So far I have only implemented setting LFUSE and HFUSE in software, but there is no reason why the code couldnt be extended to support chip erase and programming the entire flash as well. Overview The fuse programming process is simple Upload the HVFuse sketch to the Arduino, available for download here HVFuse. Install the shield and apply 1. Capture Perfect 3.0 Free Download Software. Spi Serial Flash Programmer Schematic Software' title='Spi Serial Flash Programmer Schematic Software' />VDC to the terminals on the left. Wait for the red LED to turn on if it isnt alreadyInstall the ATmega to be repaired. Push the button. As soon as the LED turns back on, the AVR is fixed and ready to be put back into serviceSchematic Here is an Eagle schematic of the HV Programming shield click to enlarge Update 1. An observant reader pointed out that there were three errors in the way GNDAGND, AREF and VCCAVCC were connected on the target AVR in the original schematic. The errors have been fixed and the updated schematic is below. Apologies for any confusion this caused. Parts list An Arduino NG, Diecimila, or compatible. A piece of perfboard cut to size. Header pins for the Arduino interface note I had to drill some of the holes to get the headers to fit the nonstandard pin spacing for digital lines 8 1. XCart_image/Device-info-Atmega.jpg' alt='Spi Serial Flash Programmer Schematic Software' title='Spi Serial Flash Programmer Schematic Software' />An LED which indicates when it is ok to insertremove the AVRA 2. N3. 90. 3 or similar NPN transistor 2. N2. 22. 2, etc. 2. Arduino from short circuits in case something goes wrong. A pushbutton switch this is the go button. A 2. 8 pin socket for the target AVRKits A kit version of this project is available. Visit the HV Rescue Shield 2 product page for more information.