Relay

[456mb]

Hi i new here, i have a simple question

i have a raspberry 3B and a relay



only i want test on/off the relay in the raspberry any simple code for testing??? i find in google but i find only for 8 channels or more of three pins

thanks

[pcmanbob]

You will need to provide much more info on the relay board you want to use the picture gives no info.
A link to a data sheet or other specification sheet is what will be needed.

[drgeoff]

It is a 5 volt relay. The board has a transistor Q1 to the left of the relay. There is resistor R1 (150 ohms?), probably between the transistor base and the input pin labelled S.

A diode, probably across the relay coil. And an LED, but no sign of a series resistor for it.

[gordon77]

This site Q&A says it will only work with 5v...

http://www.cytron.com.my/p-bb-relay-5v-01

[drgeoff]

That site also says the control input level is TTL. That is 2.4 volts.

[gordon77]

If you follow this link it says the signal input min'n 3.3v max 5v so might work. + supply is 5v.

https://www.parallax.com/product/27115

[456mb]

i buy here https://www.amazon.com/gp/product/B00TO ... UTF8&psc=1

is probability connect direct ? relay -> raspberry ??

5V => + (relay)
GROUND => - (relay)
GPIO => S (relay)

is correct ??

https://youtu.be/3u45htuQeag?t=24s

thanks for your time and help