Projects

All circuits presented here are derived from design and application notes from various magazines, journals and my own scribblings. Unless otherwise noted most are my own work. All designs are placed into the public domain. If you find that a design infringes a known copyright, please inform me.
DD PwrSupply
6805 Pgrm
Temp Monitor
Car Alarm
SLA Charger
One Cell Charger
Super Simple Modem
RPM Tacho

A simple design for a disk drive power supply using the SGS L296 switching regulator. Based on SGS APP note.

Simple programmer for the MC68HC705C8 and MC68HC805C4 uC. PCB and panel layouts included. This is an original design.

An early design excercise for a multichannel thermocouple based temterature monitor/controller, circa 1986.

A schematic for a simple car alarm. No microprocessor is required for this design.

A simple sealed lead acid battery charger. Charging power is derived from a primary lead acid battery.

A simple charger for a single cell battery, 1.2V at up to 4.5A.

A very early schematic for a simple chip based modem. The chip used in this circuit is now obsolete.

A simple tachometer for tuning RC car gearing. Can be used as a general RPM display.

A password is required to print these files, to obtain the password please contact me by email at: fleatech@optusnet.com.au

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