A simple module based on 555 timer IC, which will help you to make an LED flasher / Astable multivibrator easily.
Package includes :
Detailed explanation of the circuit, calculation and timing diagram is given here. It is better to provide the voltage supply from a stabilized voltage source. Purchase the following two DIY modules to create a 555 based astable multivibrator from a stabilized voltage source.
Power supply for the LED flasher / 555 based astable multivibrator DIY board is given from the output side of 7805 based voltage regulator. Connections are done as shown in the following diagram. Red line indicate the positive terminal and black line indicates the negative terminal. Purchase the modules from following links.
After completing the circuit, vary the potentiometer to change the ON time and OFF time of output waveform. Speed of LED blinking will vary with the value of potentiometer. Now, connect the output terminals of LED flasher / Astable multivibrator DIY board to Digital Storage Oscilloscope to see the output in real time.