Logic Probe using NOT Gates (Inverters)
This logic probe using NOT Gates is implemented with three NOT gates, one rectifier diode, two LEDs and two resistors.
Aug 292018
Aug 162018
Dimmer / AC motor speed controller
If you want to control the light level of a room or if you want to control the speed of a drill or a fan (devices that use AC motors), this is the circuit you are looking for
Aug 142018
Water level controller circuit using CD4001
This water level controller circuit controls the level of water in a tank. Unlike mechanical controls using a floating buoy, this circuit uses two sensors, an upper sensor and a lower sensor,
Aug 032018
Soldering Iron temperature controller circuit
You can buy a Soldering Iron temperature controller system with many features, but here we want to give a circuit for you to do it yourself.
Jul 172018
Differential Temperature Controller.
This circuit measures the temperature difference between 2 sensors and activates a relay when they are different
Jul 142018
This ON-OFF Switch circuit using a 555 timer is simple, useful and easy to implement.
This circuit has many applications on places where it is necessary to activate and deactivate (connect and disconnect) an electrical or electronic device.
Jun 132018
20 Amp Variable Power Supply using LM317
This 20 Amp Variable Power Supply varies its output voltage from 1.5 to 15 volts and is based on the well-known variable voltage source configuration, where only the LM317 voltage regulator is used.
Jun 062018
This Relaxation oscillator using an UJT transistor circuit serves to generate signals for power control devices such as thyristors, TRIACs
Jun 052018
LM317 variable voltage regulator circuit diagram.
LM317 characteristics. How the voltage regulator circuit works, Regulator circuit operation improvement
May 312018
Fire alarm circuit using thermostats and SCR.
This circuit uses several thermostats in parallel for its operation. They can be as many as you want and must be placed in the places where you want to sense the temperature.
May 252018
Zener diode Voltage regulator calcutation
A Zener diode Voltage regulator calcutation is made using a simple circuit of a resistor /Rs) and a Zener diode (Z).
This two elements values and characteristics are obtained using special formulas
May 242018
Logic probe circuit with CD4001 IC
This logic probe circuit is useful for people who needs an instrument to measure the logic levels on digital circuits. This circuit is implemented with CMOS IC technology and is recommended for testing circuits using the same technology