Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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Automatic Night Light with 555 and relay
This automatic night light using 555 IC turns on lights when there is no daylight. The circuit is perfect for lighting single places such as the garden, the front door of the house, the entrance to the garage, etc.
Millman’s Theorem – Millman’s equivalent circuit
Millman’s theorem is used to directly obtain the voltage between the ends of a parallel branch circuit. Equivalent Millman circuit Formulas, example.
Window comparator using op amps
Window comparator using op amps A window comparator lets you know if a signal is within or outside a previously defined acceptable voltage limits.
Electronic sound control Circuit (applause)
This electronic sound control circuit works like a sound activated relay and can activate or deactivate a device connected to it, by two consecutive claps.
Push – Pull Amplifier – Push – Pull Amplifier Operation
Push – Pull Amplifier
A Push – Pull amplifier is called that way, because it uses 2 groups of transistors and only one works at a time. One group pushes in one direction while the other pulls in another direction. Each group is responsible for amplifying a single phase of the input wave.
PUT – Programmable Unijunction Transistor
What is a PUT?
PUT – Programmable Unijunction Transistor. Main characteristics. PUT and UJT. Oscillator circuit design and waveforms. Frequency formula
Twilight Switch Circuit
This Twilight switch circuit activates a light, a lamp, a motor, etc., at the time of sunset and performs the reverse process at dawn.
The is an ideal circuit for activating a security light that must be on all night.
12V Battery Charger Auto Shutdown Circuit
This 12V battery charger circuit allows you to charge a 12V car battery using an LM350 voltage regulator and an LM301A operational amplifier.
Sound Activated Flash trigger using 555 and LM386
With this sound activated flash circuit, you can achieve incredible pictures of the most unexpected moments. Pictures like a water balloon that just burst and the water still floats in the air, or when an object of any type explodes.
Water Level Alarm with Three Transistors
Water level alarm. Simple & small alarm with few components. Has small current demand, it can work with a 9V battery for a long time
Capacitor Charging Process (RC circuit)
Capacitor charging process. Capacitor charging process shows the variation of voltage and current in the capacitor over time, when it is connected to a DC voltage source
Parallel RC circuit
Parallel RC circuit
Voltage, Currents, Phasor diagram & Impedance. Voltage is the same on the capacitor and resistor. Current is ahead of the voltage in the capacitor