Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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5A Variable Power Supply with LM338 Voltage Regulator
This 5A variable power supply uses the LM338 voltage regulator. This regulator works in the same way as the LM317 adjustable voltage regulator known to all.
Long Duration Timer with NOR Gates (CD4001)
Long duration timer or long delay time with NOR gates. This very simple circuit allows us to turn off the TV or radio in the event that we fall asleep
Dimmer / AC Motor Speed Controller Circuit using TRIAC
A very simple circuit that can be used to control the speed of an AC motor or the level of a room light using a TRIAC.
Soldering Iron Temperature Controller (TRIAC – DIAC)
Very simple soldering iron temperature control system you can make yourself. It uses very few components. Ideal for DIY projects and circuits
Two-way traffic light Circuit using 555 and CD4017
This Electronic two-way traffic light circuit achieves the functionality of a typical two-way traffic light using a 555 timer and a CD4017 decade counter.
12V to 24V Converter Circuit
This 12VDC to 24VDC step up converter is very useful to power devices that run on 24 VDC when we have a 12VDC voltage source as it could be a car battery or alike.
20 Amp Variable Power Supply using LM317
20 Amp variable power supply with an output voltage from 1.5 to 15 volts using the LM317 regulator and 4 2N3055 power transistors to amplify the current capacity
12V to 9V DC Converter Circuit Diagram (PCB)
This 12V to 9V DC converter is very useful for powering 9V DC devices in a car that uses 12V battery. The maximum current consumption allowed by this circuit is 0.8 amps.
Darkness detector circuit with audio output using 555
The main elements of this circuit are the 555 integrated circuit, working as an astable multivibrator and an LDR which is used as darkness sensor.
1.5 v Joule Thief Circuit with no Toroid Coil
This 1.5 V Joule Thief circuit can turn ON one LED. The circuit doesn’t use a toroid coil, but you can turn on a common red, green, or yellow light-emitting diode (LED).
6 Watt Audio Amplifier Circuit with TDA2613 (Hi-Fi)
High fidelity 6 watt audio amplifier circuit with the TDA2613 Integrated Circuit, very easy to implement due to its very few external components
Battery Charge Monitor Circuit with LM3914 IC
Battery Charge Monitor Circuit with LM3914 IC
This battery charge monitor shows, with colored LEDs, the charging process of a typical 12-volt car battery using the LM3914 Dot / Bar Display Driver.