Content for BD139

BD139

This series of plastic, NPN Power Bipolar Junction Transistors are designed for use as audio amplifiers and drivers utilizing complementary or quasi complementary circuits.

WiFi Based Robot with Android Application Control

“How To Build a WiFi Based Robot with Android Application Control | Android App with MIT App Inventor Components - VPC Card board 5mm, - Solderless Breadboard, - DC Gear Motor x 4, - Arduino NodeMcu, - L298 Motor Driver, - BD139 NPN Transistor, - 1k Resistor x …

3 Channel Analog Video Splitter with Video Amplifier

“If you need to drive multiple video gadgets or monitors from a single video signal source then this board is the right choice for you. This is a 3-channel video splitter with an amplifier and the circuit is built using …

Soft Starter for AC and DC Loads

“Inrush current/Switch-ON surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Inrush current is much higher than the load’s steady-state current and that’s the source of many problems such …