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 ...

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 ...

Simple 100mA Constant Current Source using Transistor. In this project, we will build a simple transistor constant current source generator using only 4 components. It is a very inexpensive circuit ...

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 ...

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 ...

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 ...

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 ...

This section outlines the basic characteristics and application design of general-purpose transistor output photocouplers (optical isolators). The figure shows the pin configuration of TLP785. CTR is ...

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 ...