Simple Clap Operated Stairway Light Switch Circuit
#clap switch
#light control
#sound sensor
#home automation
#stairway lighting
#relay
#transistor
#DIY
#energy saving
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Dynamic Microphone Preamplifier using C945 transistor
This circuit utilizes three transistors (2SC945, 2C1815, or 2SC828) as the primary components, functioning as a typical low-noise transistor amplifier. It offers a gain of approximately 200 to 300 times and has a frequency response ranging from 50Hz to 100KHz....
The counter
The circuit of this device is relatively straightforward. An input circuit filters the signal from the antenna to minimize sensitivity to other phenomena and protect against overvoltages. Four transistors create a "one-shot" section that is activated by the input circuit,...
Single-junction transistor a phase-shift trigger circuit
Figure 16-29 (a) illustrates the trigger output through a resistor R2, while Figure 16-29 (b) depicts the integration of a programmable unidirectional transistor (PUT) trigger circuit. The adjustable potentiometer RP can modify the conduction angle of the TRIAC to facilitate...
Electronic Horn
Electronic horn circuit diagram. When the power line is switched on, a basic tone is produced by transistor T2 and transformer X1, which is frequency-modulated by a wandering voltage generator affected by a low-frequency square wave generator. This is a...
Astable Multivibrator using transistors
The output can also be taken from the collector terminals of the transistors, as illustrated in the circuit below. To understand the operation of the circuit, it is recommended to read about how a transistor functions as a switch.
In a...
Common emitter amplifier circuit resistance and capacitance coupled basic
Common emitter amplifier circuit with resistance and capacitance coupling.
The common emitter amplifier circuit is a fundamental configuration in analog electronics, widely utilized for its ability to amplify voltage signals. This circuit employs a bipolar junction transistor (BJT) as the active...
Clap switch circuit
This clap switch can turn on and off a light, fan, music system, or alarm—virtually any gadget—at the sound of a clap. The most remarkable feature of this design is its ability to provide efficient two-state control without the use...
Two transistor siren
The circuit diagram illustrates a simple two-transistor alarm circuit powered by a 9V PP3 battery. In this configuration, the two transistors are arranged to create an oscillator. The frequency of the oscillator increases when switch S2 is pressed and decreases...
Vehicle Detector
A simple single-transistor Colpitts oscillator is depicted in the schematic. When a vehicle passes over the loop, the inductance decreases, resulting in an increase in the oscillator frequency. A microprocessor measures the oscillator frequency and takes appropriate actions based on...