This project provides a good introduction to practical electronics in the form of a "programmable" electronic combination lock. It introduces the builder to a variety of components including the 4013 dual D flip-flop IC.
The Control Board contains the circuitry of the decoding ICs, a number combination matrix for hard-wiring the 4-digit security code (using jumper wire provided) and a relay output for switching an external load.
The Control Board is connected (using the 0.6m long ribbon cable supplied) to a separate Touch Keypad Board with 9 touch pads. If an incorrect digit is pressed the lock is automatically reset.
A PP3 battery clip is included for demonstration purposes. A mains adapter is recommended for long-term use.
Specifications| Supply Voltage | 9-12Vdc |
| Power Supply Options | 1 x PP3 battery for demo purposes or main adapter 660.446UK with connector 777.001UK or 777.001 |
| Output Type | 1 x SPDT Relay |
| Maximum Output Load (Resistive) | Up to 48Vac or 28Vdc @ 3 Amps max. (Relay Datasheet) |
| Output Connections | NO, NC, C (Relay FAQ) |
| Control Board Dimensions | 60x75mm |
| Keypad Board Dimensions | 32x70mm |
| Product Format | SELF-ASSEMBLY Electronic Kit (KT) or PRE-ASSEMBLED Electronic Module (AS) Product Formats Info |
| Documentation | User Manual |
