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AirBorn Electronics Project Work

These projects date from the 1990's
Newer projects are here

SPD1 CPU unit


EX2051_1: AT89C2051 Prototyping PCB

  • AT89C2051 CPU Development PCB, Proto & I/O
  • DB9 serial port, optional multidrop
  • Second COM port
  • Relays, LEDs, Piezo
  • Reed & Push Switch, A/D, Light dependent resistor

PG8951: AT89C51 Family programmer

  • Erases & Programs AT89C51-55 FLASH CPU's
  • Stand alone test switch, Red and Green LEDs
  • PC Compatible serial
  • Programs security bits, reads signatures, verifies
The Atmel AT89C51, AT89C52, AT89C55, AT89LV51, AT89LV52 and AT89S8252 are FLASH memory CPUs compatible with the 8051 instruction set. The PG8951 erases, programs and verifies these devices in 3 seconds per kilobyte of code written. As the devices are FLASH, they can be reprogrammed as often as needed.

The PG2051 may be connected to a PC or other host by a serial cable. The programmer interface is PC serial compatible, operates at 9600 Baud, and accepts standard Intel Hex files.


ProtAn1: Serial Protocol Analyser

  • Analyses and displays serial protocol settings
  • DB25 Gold plated connectors
  • Handles all NRZ protocols
  • RS232 Self powered, or plug pack powered if insufficient drive
  • Operates to 38,400 baud

SPD Power supply and intrinsically safe circuitry


Control Panel Interface

    --AirBorn Electronics--
  • Control panel interfaced to PC RS232 COMs
  • RS232, optional Multidrop
  • Plugpack powered
  • 32 Switches, 32 LEDs/Relays
  • Multiplexed I/O

AT89C2051 FLASH CPU demo PCB

  • Miniature, simple demo PCB for AT89C2051
  • 11 Port bit LEDs
  • One Mercury, One push switch
  • DB9 Serial (Rx only)
  • Battery powered

Control Panel Interface - AT89C2051 FLASH CPU

  • Control panel interfaced to PC RS232 COMs
  • RS232, optional Multidrop
  • Plugpack powered
  • 32 Switches, 32 LEDs/Relays
  • Multiplexed I/O
  • AT89C2051 CPU

HSETI1: AT89C2051 Project PCB

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  • 8 High current drive LED strings, speaker drive
  • Photo-sensor input, adjustable sensitivity
  • Unused lines (including serial port) available on pads
  • Battery Powered
Complete technical information


[Picture:  PG2051 Programmer]

PG2051 - A Programmer for the Atmel AT89C2051


The AT89C2051 is a 20 pin 8051 compatible microprocessor (including serial port) with 2k of FLASH memory, available from Atmel (see www.atmel.com). 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 may be connected to a PC or other host by a serial cable. The programmer interface is PC serial compatible, operates at 9600 Baud, and accepts standard Intel Hex files.

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.

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