 Multi Rocket Launcher
Simple circuit for rocket model starter.
On-Off Temperature Control
This circuit controls a load (in this case a dc brushless fan) based on a temperature compared with a setpoint.
DC Motor Reversing
A DC motor reversing circuit using non latching push button switches. Relays control forward, stop and reverse action, and the motor cannot be switched from forward to reverse unless the stop switch is pressed first.
Single Zone CMOS Alarm
This circuit features automatic Exit/Entry delays, timed Bell Cut-off and System Reset. It has provision for normally open and normally closed switches and will accommodate the usual input devices such as Foil Tape, Pressure Mats, Magnetic Reed Contacts, Passive Infrared Detectors and Inertia (Shock) Sensors.
5 Zone Alarm System
This is a complete alarm system with 5 independent zones suitable for a small office or home environment.
Periodic Timer
A switched timer with equal make and equal space periods timing adjustable from over 6 minutes to 38 minutes.
Frost Alarm
A simple thermistor triggered cold switch with adjustable threshold.
Electronic Keypad
Secure any electronic device using this electronic keypad. Circuit is relatively simple and it's built with 4081 CMOS quad 2 input "AND" gate
Garage - Shed Alarm
This is a simple single-zone burglar alarm circuit. Its features include automatic Exit and Entry delays. It's designed to be used with the usual types of normally-closed input devices such as - magnetic-reed contacts - micro switches - foil tape - and PIRs.
5 to 30 Minute Timer
A switched timer for intervals of 5 to 30 minutes incremented in 5 minute steps.
Car Alarm and Immobilizer
This circuit features exit and entry delays, an instant alarm zone, an intermittent siren output and automatic reset. By adding external relays you can immobilize the vehicle and flash the lights
Proximity sensor
This circuit takes the guesswork out of proximity detection by inducing eddy currents in a living being, whether animal or human. May serve as alarm or some kind of switch.
Infra Red Switch
This is a single channel (on / off) universal switch that may be used with any Infra Red remote control using 36-38kHz
Hot Water Level Indicator
A simple device to indicate various levels of hot water in a tank.
Dark Activated Switch
This circuit will activate a relay when light falls to a preset level. Light level can be adjusted with VR1 and the relay contacts may be used to operate an external light or buzzer.
Voltage Controlled Switch using 555 Timer
Voltage Controlled Switch with popular 555 timer circuit used in a novel way.
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