Philip Peter writes:
I always like a challenge, so when I saw [simpleavr]s vusbtiny programmer, I started to wonder how small I could make an AVR programmer. All in all I’m pretty pleased with the result.The schematic is almost the same as the original one. I only added a LED an resistor to indicate a proper power supply.
Minimalist AVR programmer - [Link]
Umair Mukati build the ULTI-ISP USB key programmer which supports programming for AVR & 8051 microcontrollers:
The ULTI-ISP can be used to program a wide range of AVR microcontrollers as well as 8051 series. The device can be used to read, write and erase flash memory, EEPROM, Fuse Bits. The product has two programming speed modes. It can be self-programmed by any other AVR Programmer or by another ULTI-ISP using 6pin IDC Cable. Another external header can be used to supply power to the target device. The ULTI-ISP includes an on-board AVR ATMega8 which deals with all the USB transactions and provides the data to the target device needed to program it. A standard 6 pin IDC ISP cable can be used to program the target device. The two indicators are used to reflect the ULTI-ISP status, one is for power and another is for programming status.
ULTI-ISP USB programmer for AVR & 8051 - [Link]
PICkit 2 programmer is open source, so you can build your own:
PICkit 2 was originally built by Microchip as open design programmer with the schematic, source code and firmware available to boost the popularity of the PIC devices. Because of that it is easy to build a clone version of the original device. Most of the clones will produce unregulated 5 volt VPP where the original Microchip PICkit 2 provides adjustable VPP output to allow 3.3 and 2.5 volt parts programming. The schematic I have used is based on the original PICkit 2 without programmer-to-go functionality. That functionality allowing a hex file to be downloaded to the PICkit 2 to later program PIC microcontrollers without a PC with a simple pressing programmer’s push button. I do not think that functionality is required for a hobbyist but allows simplify the schematic by omitting two 24C512 EEPROM chips. The Eagle Files designed using only thru-hole mounting parts.
Build your own PICkit 2 programmer - [Link]
The circuit for this project is quite simple. Its purpose is to adapt the GPIO pins of the Raspberry Pi to the voltages expected by the PIC. It also provides LEDs for diagnostic purposes.
PIC Programmer for the Raspberry Pi - [Link]
Microchip PIC® 8-bit microcontrollers are quite popular amongst hobbyists, and I’ve used them for a long time in several of my projects. They are very cheap, use only 35 assembly instructions that are easy to learn, and most importantly they use flash memory, which gives you the possibility to program the device virtually as many times as you want during your experiments. Up until now I’ve used a simple serial interface and picprog to program them under Linux, but sadly the trend is not to include a serial port anymore on new computers/laptops. Of course there are USB programmers on the market, but quite often their price exceeds 30€ and not all of them work well on Linux. Also a commercial programmer usually supports hundreds of different chips, while all I needed was a simple and cheap way to program, say, the four chips I work with most of the time. So, with the introduction of the Raspberry Pi, and the possibility to control external hardware through its GPIO connector, I thought it would be worth spending some time to design a simple interface and write a software to program some PICs. The result of about a week of work is rpp – a Raspberry Pi PIC Programmer that uses the GPIO connector.
Raspberry Pi PIC Programmer using GPIO - [Link]
This programmer supports: ST Micro M25(E), ST Micro M45(E), Macronix MX25L, Atmel AT25FS, Atmel AT25DF, Atmel AT25F, Amic A25LxxP, Amic A25Lxxx, Eon EN25(B/D/F/P) read only, Winbond W25X, Winbond W25Q (OTP), SST SST25(LV/VF)xx, SST SST25VFxxxB, Spansion S25FL and ESMT F25L.
vane @ tehnikservice.net gives out 2 x free PCBs for his SPI Flash programmer. Please leave a comment on this post and we will select two random winners to give out the PCBs.
SPI Flash Programmer V2 - [Link]
LadyAda some time ago build a low-cost AVR ISP. In μC.net there was a further development of the project under the name “AVR ISP Stick” or “People’s Programmer” I take up the project and develop it further with the permission of Ada.
AVR ISP Stick - [Link]
Since this is a well working low budget AVR ISP progammer (by Thomas Fischl), I offer a compact single-sided THT-SMD combined layout. The circuit is identical to the official programmer, so the original firmware can be used with this board. This programmer is supported by avrdude. One of the main features is that the low speed USB protocol stack is realized directly with the used AVR controller, which makes this programmer a low budget one, about 5EUR material costs. Notice however that this programmer cannot be used with 3V3 systems without an additional level shifter.
Alternative board for USBasp AVR ISP programmer - [Link]