LM139 One-Shot Multivibrator

The circuit below is a one-shot multivibrator. One shot multivibrator is also known as monostable multivibrator, or timer. The main function of such circuit is producing a fixed width pulse. The width of this pulse is determined by the component value selection at the time of designing the circuit. The main component of this circuit is the LM139, and this […]

Read more

Ears and Speakers Protector

Sometimes the output volume of amplifier is too high and hurts our ears. As well as hurting your ears, this incident could damage your loudspeaker. The circuit below can be used to protect both our ears and our loudspeakers from destructive output signal of amplifier, works by deactivating the amplifier when high level signal is detected. This circuit will disable […]

Read more

Solid-State (555 IC) Stroboscope

Stroboscope is used to measure the speed of rotation, using the effect of strobed light, where a moving object will be perceived as stationary object if the light is strobed fast enough relative to the movement speed. When applied to a rotating object, a mark on the object will be perceived as not rotating if the frequency of the strobed […]

Read more

Fuzz Box Distortion Pedal – Guitar Effect

This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp pre amplifier will be R3/(total impedance of guitar pickup + C1).  With 1 kOhm guitar pickup and C1 combination impedance, the gain would be more than 1000x, this would be enough to make sure the […]

Read more
« 1 2 3 4 5 6 7 8 9 10 11 12 ... 50 »
1 3 4 5 6 7 50