Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
Recent posts
Multitone generator circuit – Open door indicator using CD4001
Multitone generator circuit / Open door indicator using CD4001
This very simple multitone generator circuit has many applications but here it is shown as door indicators, generating a different tone for each door of our house
Dielectric constant / Relative Permittivity (Capacitor)
What is the Dielectric constant / Relative Permittivity? The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is a dimensionless physical constant
LED Sequencer using 4017 Decade Counter (LED Chaser)
LED Sequencer using 4017 Decade Counter (LED Chaser). This circuit has 10 LEDs connected to the decade counter outputs. LEDs light up in sequence. Only one LED is ON at a time
Zener diode Voltage regulator Circuit Design – Diagram
Design method. Determination of the voltage, power of the zener diode and of the limiting resistor Rs
Voltage Regulators – Linear, Switching
Voltage regulators (linear, switching) provide a stable and fixed voltage output to give energy to electronics circuits from an unregulated power source
12 Volt Car Battery Charger with LM7815
This 12 volt car battery charger is a circuit with few components that allows us to charge a common car battery. Battery charging stops when it reaches its maximum voltage.
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.