Photos of a device I designed at GNS from Dec 2004 to Feb 2005.

8051 based MCU, code written in C and inline assembler.

The device is a Kiwi Fruit tester, basically, it tells you if the fruit is ripe or not. It does this using non invasive techniques.

For reasons of intellectual property, I can't give away too much information. For more details contact Jim Pithie at GNS.

Prototype board - testing LCD:

Some parts were tiny! Hand soldered using a fine tipped iron and a microscope:

The ADC board, using a PWM blue LED, and two photodiodes:

Main board with LCD removed:

Close up of the 8051 based MCU, showing fine pitch of the tracks, all hand soldered: