Without using difficult components or integrated circuits, this circuit triggers a lamp with one touch and keeps it lit for a few seconds to a few minutes. An ideal circuit for balconies, corridors and other places that need lighting for short time intervals.
This article shows you how to build a circuit that fires by the approximation of a magnet, but does not use reed-switches. The circuit can be used in opening doors, triggering lamps and other similar applications.
By picking up a stronger sound, depending on the setting, this circuit triggers a relay for a time that can be adjusted from a few seconds to several minutes. The circuit can be used as remote control or alarm.
This only 3-component circuit causes a small lamp to blink with the sound of your amplifier. The circuit can be used with amplifiers from 2 to 100 watts of power without problems.
The purpose of this circuit is to produce rhythmic pops that serve to beat the tempo when playing a musical instrument or to control how a gymnastic exercise is done.
This experimental transmitter, which can range from a few tens of centimeters up to a few meters, operating in the medium wave range has the characteristic of being able to work with energy obtained from a cell of water and salt constructed with improvised material.
In this circuit of an American publication of 1978, the integrated circuit may be the 4001 and the...
The integrated circuit can be any operational and T1 can be a BC548 and T2 a TIP41 in this circuit of a...
This circuit was found in a 1978 American publication. It beeps if the car's lights are on and the...
This circuit, suggested by Philips Components (1980), uses a fast voltage comparator and requires...
The power source shown for powering for small TTL circuits was found on a Radio Electronics...
IGBTs are widely used in frequency inverters, power controllers, switched sources and DC/DC...
This oscillator can run in frequencies up 10 MHz depending on the Power supply voltage. The 1 µF...
This one-digit counter is part f the samples bench of the MultiSIM in one of its versions. The...