Easy 555 Timer LED Fader DIY Circuit ⚡ #shorts

I have created this tiny little 555 LED fader module. After assembling the components, you just need to power this module by providing a voltage between 5V to 15V to fade the LED. So, this is how my board looks like in 2D and 3D. There are 16 breakout boards in this 100cm by 100cm assembly. Let me quickly show you guys how to assemble the components to this custom made board. Let's start by soldering the IC base to the board. Then let's solder the two resistors to the board. Next, let's solder the capacitor followed by the transistor to the board. Then let's solder the LED socket and power socket to the board. You can either solder a pair of female pin header or male pin header or solder a pair of wires directly to the board to power this module. Once done, let's insert the 555 timer IC to the IC base. The heart of this circuit is the 555 timer IC. Pin number 1 of the IC is connected to ground. By connecting pin number 2 and 6 of the 555 timer IC, we put the IC in A-stable mode. In A-stable mode, the 555 timer IC acts as an oscillator, re-triggering itself, generating square waves from output pin number 3. Three other components connect to this junction. First one is the 33uF capacitor. The positive pin of the capacitor connects to this junction and the negative pin is grounded. Second one is the 47kΩ resistor. One of its legs connects to this junction and the other leg is connected to the output pin, pin number 3 of the IC. Third one is the base of the BC548NPN transistor. The collector of the transistor along with pin number 8 and 4 of the IC connects to the positive terminal of the battery. The LED along with its current limiting resistor is connected to the emitter of the transistor. That's it. As simple as that. When pin number 2 of the IC detects voltage less than one-third of the supply voltage, it turns on the output on pin number 3. And when pin number 6 detects voltage more than two-third of the supply voltage, it turns off the output. This is how the trigger pin pin number 2 and the threshold pin pin number 6 of the 555 timer IC senses voltage and controls the output at pin number 3. So, here is a quick demo on a breadboard. In the current setup, I have a 33uF capacitor and a blue LED on the breadboard. Replacing the 33uF capacitor with a 100uF capacitor makes the LED fade in and out slower as the 100uF capacitor charges and discharges slower than the 33uF capacitor. Also, by replacing the blue LED with a red LED, we can make the LED to stay on longer than the blue one with the same value of capacitor. This is because the forward voltage of the blue LED is higher than that of the red LED. Cool. So, this is how the module finally looks like. You can install female pin headers in place of the LED or capacitor if you want to use this as a development or testing board instead of a module.