Newest circuit diagrams

Heating System Thermostat

Controlled by indoor and outdoor temperature Simple, high reliability design

Guitar Control

Stand-alone, 9V battery powered unit. Three-level input selector, three-band tone control

Pulse-Generator & Signal-Tracer

Dual-purpose test-instrument. Very simple circuitry, 1.5V Battery-operated

5 Zone Alarm System

This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC's and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a "system armed" indicator

Power Failure Alarm

This is a very basic alarm designed to let you know when the electricity supply fails. The alarm is powered from a battery which uses no current consumption at all in standby, a battery should therefore last its full shelf life.

Band 2 Preamplifier

This is a VHF amplifier for the Band 2 Radio Spectrum tuning approximately 88 - 108 Mhz.

Rotating & Flashing 230V Lights

Three channels - Three operating modes. Completely ac-insulated circuit board.

The ATL-3 Loop Antenna

This antenna is the result of long term development and user feedback.

60W Guitar Amplifier

Bass, Treble, Harmonic modifier and Brightness controls. Output power: 40W into 8 Ohm and 60W into 4 Ohm loads

Model rocket launch controller

It has the ability to control up to 8 pads through a 6 core cable.