Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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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
Missing pulse detector circuit using the 555 timer
This circuit is very interesting because it can detect or warn of the absence or delay of an expected pulse, which under normal conditions should be received at predefined intervals.
Non-inverting Operational Amplifier
How to find the voltage gain (formula) in a non-inverting Op. Amp. How to find the Input impedance (Zi) and output impedance (Zo) of a non-inverting operational amplifier.
Sinusoidal oscillator (basic structure)
Basic structure of the sinusoidal oscillator
The sinusoidal oscillator basic structure consists of an amplifier (A) and a selective frequency network (ß) connected in a positive feedback loop
Photodiode – How does it work? – Optoelectronics
Photodiodes produce a leakage current that is proportional to light intensity. This current flows in the opposite direction to the current in a conventional diode
Temperature alarm circuit with Op. Amp.
Temperature alarm circuit with 741 operational amplifier
This temperature alarm circuit with operational amplifier activates a relay when the temperature of the place to be controlled exceeds a set level. Useful for an oven temperature control or a cooling system