The Circuit

Figure A5-3

Circuit boards

Figure A5-3

Circuit boards

We have designed the circuit around pre-drilled stripboard (Veroboard® type)as this requires no skill at making PC boards. If you know how to etch boards, then you may well end up with a neater arrangement. However, please do not fall into the trap of trying to cram everything into as small a space as possible. That is silly and counterproductive, and dangerous when dealing with the power board.

In the diagram, we have completely removed the lands between terminals where breaks are indicated as this makes it clearer to see, but just removing a small circle with a 4mm drill bit to break the land is all that needs to be done in practice.

All resistors are 1/4 watt carbon and both the 74HC00N and MOC3041 chips are mounted on 14 pin dil sockets.

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