Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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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 do not use a toroid coil, but it is possible to turn on a common red, green or yellow 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.
Audible Continuity Tester
Continuity Tester with Buzzer – Works on live circuits.
This continuity tester with buzzer works on live circuits. Very important, as common continuity testers are used with the power source disconnected.
Power Supply – Block Diagram (AC – DC conversion process)
Many electronic circuits need a direct current (DC) voltage source, but what we commonly find are voltage sources of alternating current (AC). In order to achieve a direct current voltage source, the alternating current input must follow a conversion process.
Electronic Thermostat Circuit using transistors
This circuit allows us to control the temperature of a room, turning a heating device on and off. Very useful in winter and in very cold places.