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Array of 8 transistors NPN...
ULN2803A
Array of 8 transistors NPN Darlington, anti-return Diode. Ideal to easily order relays, step-by-step motors, small motors, solenoids, etc. from a microcontroller
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ULN2803: NPN Darlington array, 8 channel - ULN2803A
Array of 8 transistors NPN Darlington, anti-return Diode. Ideal to easily order relays, step-by-step motors, small motors, solenoids, etc. from a microcontroller
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Give muscle to your output pins with this 8 amazing Darlington! This integrated circuit in DIP format contains 8 driver circuit capable of drive 500mA up to 50V power supply and incorporates anti fly-back diodes (also called "freewheeling diode"), which makes it possible to control windings.
This allows the small microcontroller (or microcomputer) to easily control de solenoids, relays, continuous motors (in one direction) and unipolar step-by-step motors.
Note that it is an 'open collector' circuit - It can only be used to connect a load to ground and there will be a voltage drop of 1 Volt (or more)... voltage loss caused by the internal transistors.
The inputs can be controlled in logic 3.3V or 5V.
2.54mm pin spacing make it easy to place these components on the breadboard, prototyping board and perfboard.
See the technical data sheet of ULN2803A