AT89C2051_programmer Python & Arduino-based AT89C2051 programmer Software requirements • Python3 with pip • Arduino IDE Hardware requirements • Aruino UNO board • Optocoupler (strongly recommend MOSFET-pair output) • 12V nominal power supply (actual voltage required ~13.5V) • (recommended) ZIF socket The schematic is included as schematic/schematic.pdf. Flashing the programmer • Open AT89_prog/AT89_prog.ino in Arduino IDE • Flash onto the Arduino board Installing the programmer software • (recommended) Create a python virtualenv • python3 -m venv venv •. Venv/bin/activate • Install from PyPI pip install at89overlord Programming • Place chip in socket • Connect the Arduino board to the computer • Connect the 12V power supply • On the computer run at89overlord -f PATH_TO_INTEL_HEX_FILE Other functionality Run at89overlord -h for the full list of commands and flags Upgrading from an older version • Check for changes in the schematic • Reflash the Arduino board • Reinstall the programming software Running on Windows It should be possible to use this programmer on Windows.

AT89C2051 Programmer. The rest of the board is a very fundamental AT89C2051 Programmer that uses a single 74HC174 chip and a bit of power supply switching logic. Input - AT89C2051 Programmer You can connect the DT206 board to a DT004 board using a pair of 30 pin right angle male and female connectors. (You will see the pictures when I get boards).

• Install cygwin with python3 and pip • When running the at89overlord append -p COMn to the arguments list, where n is the number of Arduino board's serial port.

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©2010 AirBorn Our AT89C2051 and AT89C51 programmers date from the 1990's - they are very straightforward, work perfectly well under linux or windows, and we still sell replacements. To help our previous customers we offer Erase, Program and verify an AT89C2051 in one easy operation! Programs in just 6 seconds!

PG2051 - A Programmer for the Atmel AT89C2051, from AirBorn Electronics The AT89C2051 is a 20 pin 8051 compatible microprocessor (including serial port) with 2k of FLASH memory, available from Atmel (see ). The PG2051 erases, programs, and verifies AT89C2051 chips in 6 seconds. As the AT89C2051 devices are FLASH, they can be reprogrammed as often as needed. The PG2051 is driven by sending it a (standard) Intel hex file through its serial port. This means it can be driven by any operating system - all that is necessary is that the host has a serial port to send the data to the programmer (at 9600 baud) - the programmer will do the rest. The programmer features a test switch which allows the owner to check if an AT89C2051 is blank, working, programmed or failed in just one second - without needing the PC connected.