Simple flasher on NE555 timer

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

A simple flasher circuit on the NE555

Simple flasher on the NE555 timer
The microvisc built a multivibrator that generates rectangular pulses. The length of these pulses can be changed by selecting a 10 μF capacitor of 220 kOhm resistor. 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 - it will not affect the performance of the entire device. It feeds on 3 V, but the power can be in the range of 3-15 V the chip allows it, only When changing the power upward, it will be necessary to select resistors in the LED circuit. If you will be using a 12-volt flasher, replace the resistors by 1.5-2 kΩ.
Simple flasher on NE555 timer
After the build, the flasher does not need to be configured and starts flashing immediately after switching 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 NE555 timer
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 stably to this day.

Date: 09.10.2018, 09:28 / Views: 52585

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