Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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Photodiode Amplifier Circuit – Current-to-Voltage Converter
Very simple circuit that amplifies the current signal generated by a photodiode and transforms it into voltage with a controlled gain
Logic Probe with 7 Segment Display
This logic probe with 7 segment display is designed with TTL technology and does not use LEDs to display the high and low logic levels found in many of the logical probes on the market. The circuit shows the capital letter “H” when there is a logical “1” or the letter “L” when there is a logical “0”.
4 Amp Variable Power Supply with 3 LM317
4 Amp Variable Power Supply with 3 LM317 voltage regulators and a LM308 precision operational amplifier. Output voltage from 1.25 to 30 volts.
Half Wave Rectifier – Half-wave Rectifier. Circuit diagram
The half-wave rectifier rectification process. Polarization of semiconductor diode in the forward and in the reverse direction. Input and output waveforms
H-Bridge DC Motor Control Circuit
This circuit allows us to apply voltage to a DC motor in either direction (forward or reverse) using a control circuit.
Shadow detector alarm circuit with two LDRs
Shadow detector alarm circuit with two LDRs
This circuit detects if there is a difference of lighting between two LDRs, and sends an audible and visual warning. Circuits that use two LDRs are more reliable than those that use only one.
Automatic Water Level Controler Circuit
This circuit ensures that an elevated tank always has enough amount of water. Perfect for 2 or more stories buildings or houses
4 Amp Variable Power Supply Using the LM317
This variable power supply using an LM317 and a boost transistor can be useful when we need more current than the 1.5 amps that an LM317 can provide.
Capacitors in Series – Capacitors in Parallel
Capacitors in series – Capacitors in parallel. How to obtain the equivalent capacitance of series capacitors and parallel capacitors? Formulas and examples
Temperature Alarm using thermostats
Temperature Alarm using thermostats
This simple alarm with thermostats circuit can be used on places where we must detect overheating. It uses 3 thermostats, and a one 2 contact, relay
Series/Parallel Resistor Reduction
Series/Parallel Resistor Reduction. Resistors reduction can be done, making some simplifications using resistors in series and resistors in parallel formulas.
Inverting Summing Amplifier using Op Amp
The inverting summing amplifier using op amp outputs a voltage equal to the sum of the voltages it has in its inputs. The explanation is based on an adder of three inputs, but applies to an adder of any number of inputs