A typical multivibrator that operates in astable mode is capable of driving an LED with the use of a single cell. The ability to use a 1.5V cell to light up a LED is a big challenge since the forward ...
Here is a simple heater circuit that can be operated from a 12V battery. The first part of the circuit is an astable multivibrator build around the two transistors Q1 and Q2 . The ON time of ...
The polarity markings on LEDs (Light Emitting Diodes) seem to be a common cause of confusion. The polarity may be indicated by a flat section on one side of the body or by one lead being shorter than ...