We previously showed you the modern electrical method to catch worms. (In fact, if you catch too many for your fishing needs, we even showed you how to make big money selling worms.) But now that you have all of those worms, you’ll want to take them fishing, and this electronic project from 40 years ago practically guarantees that the big ones will start biting.
The circuit puts out a repeated click-click sound which is reportedly a dinner bell for fish. With this circuit in a suitable waterproof container, the fish will be biting in not time.
The circuit appeared in the 1977 issue of 101 Electronic Projects, a special edition put out by the publishers of Elementary Electronics.