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Topic: Rookie - start over (Read 428 times) previous topic - next topic

cargol

Sorry,

I try  to explain again.

I'm trying to activate a relay from the output of  Arduino UNO

The relay is 12 Volts and  I have other of 9 volts. The transistror I use is a 2N222A and  I do not know that put in emitter resistor

I've tried everything and no way to activate the relay coil . If  is activated, then there is no way to disable

The program with leds  works correctly.

Someone has the outline of a circuit to do this.

thank you very much

Miquel

AWOL

Quote
I do not know that put in emitter resistor
what does that mean, please?
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
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cargol

What is the base-emitter resistor should I wear?

thank you

Papa G


What is the base-emitter resistor should I wear?

thank you

How much current does the relay you intend to use need?

0AlphaOmega

For whom does the clock pulse? It pulses for you!

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