Connect the 2N2222 transistor to the pin3 of the Arduino with a resistor connected to the base of the transistor and collector terminal to the 5V of Arduino Uno. Connect a small bulb between the ...

Transistors are inevitable parts of Electronic circuits. The success of a circuit design lies in the selection of proper transistor type and calculation of voltage and current flowing through it. A ...

Arduino circuit and code for a simple ... This design uses relays instead of opto-isolators because relays accomplish extremely high impedance "off" conditions in ways that no transistor can. I did ...

Below, you will find the circuit diagram of the Arduino DC Motor Speed control using MOSFET Transistor. It is simple and uses a minimal number of components, making it easy to understand. If you are ...

The test voltage is raised to 13.3 V dc again, and VR1 is adjusted so that the transistor turns on. With the upper and lower levels set, the NC point is connected to the circuit (15-V dc charging ...

Relay Driver Circuit Explanation: In this 4-Channel Relay Driver Circuit we have used an optocoupler whic his triggered by active LOW signal, to trigger the NPN transistor which further drives the ...

Let’s revisit the creative Arduino Uno-based design. The Arduino-powered AM transmitter was fairly straightforward. As Kainka explained, a transmitting tube was driven hard by the carrier signal ...

This example is intended to demonstrate the concept of a transistor current source (e.g., high Ro) replacing a passive resistive load. Note that the R 1, R 2 biasing suggested here is still too ...

Curious how a solar-powered lamp powers an LED with just a single 1.2-V cell? In a 2012 edition, Elektor presented a clever single-transistor voltage converter circuit by Burkhard Kainka.Let's ...