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Topic: Rookie - start over (Read 511 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.
Do not send technical questions via personal messaging - they will be ignored.

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!

cargol

Perfect, Tested and working.
You've been very helpful.
Greetings from Catalonia
Miquel

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