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May 28, 2022
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3 simple detector circuits for various household needs

3 simple detector circuits for various household needs

An excellent selection of easy-to-replicate detector circuits. The first two options are capable of performing two functions at once: a hidden wiring detector and a radio signal. The latter is able to determine the power of the carrier radio signal. This small attachment to the multimeter will help in setting up or searching for radio transmitters.

1. Radio signal and hidden wiring detector on a microcircuit

3 simple detector circuits for various household needs

The detector is built on one very common 4001 series chip.

3 simple detector circuits for various household needs

All memory can be quickly mounted using jumpers from single-core wires.

3 simple detector circuits for various household needs

Next, LEDs connected in anti-parallel, a resistor and a power block with an antenna are soldered, in the role of which there is a piece of wire.

3 simple detector circuits for various household needs

The circuit does not require adjustment and, if properly assembled, works immediately when power is applied.

3 simple detector circuits for various household needs

As already mentioned: the detector responds to radio signal radiation and to current-carrying conductors.

3 simple detector circuits for various household needs
3 simple detector circuits for various household needs

2. Detector of hidden wiring and radio signal on transistors

If there is no microcircuit at hand, there will always be transistors. In this example, the most common ones are used – BC547.

3 simple detector circuits for various household needs

The circuit is also very simple. In the circuit, 4 transistors can give excitation, so 3 is used.

3 simple detector circuits for various household needs

The soldering by hinged installation takes no more than 15 minutes.

3 simple detector circuits for various household needs

Check in action.

3 simple detector circuits for various household needs

3. RF signal strength detector

The radio carrier signal detector does not need power and is designed as an attachment to a multimeter.

3 simple detector circuits for various household needs

In this example, assembled on the board.

3 simple detector circuits for various household needs

Connects to the multimeter using terminals from broken probes.

3 simple detector circuits for various household needs
3 simple detector circuits for various household needs

A very necessary thing when setting up local oscillators or other transmitters.

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