Simple flasher on the timer NE555

A very simple flasher can be assembled on the NE555 microcircuit, which is quite common among radio amateurs. The scheme contains a small number of elements and allows you to control one or two LEDs.

Diagram of a simple flasher on the NE555


Simple flasher on the timer NE555

On the chip built multivibrator that generates rectangular pulses. The length of these pulses can be changed by selecting a capacitor of 10 μF resistor 220 kOhm. The circuit uses two LEDs that turn on alternately. But if you want to use only one LED, then the second one can simply not be included in the circuit - this will not affect the performance of the entire device.
The circuit is powered from 3 V, but the power may be in the range of 3-15 V IC, which allows, only when the power is changed upwards, it will be necessary to select resistors in the LED circuit. If you feed the flasher from 12 V, then replace the resistors by 1.5-2 kΩ.
Simple flasher on the timer NE555

After assembly, the flasher does not need to be configured and starts flashing immediately after turning it on.Instead of a 220 kΩ resistor, you can solder a variable or trimming resistor to adjust the LED blinking frequency you need.
Simple flasher on the timer NE555

I ripped off the circuit on the breadboard. Also, due to the minimum of components, the entire device can be assembled by mounting and filled with hot glue. I used such a scheme in my car, I am satisfied with the result, everything works steadily to this day.

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