=====Relais Board =====

Double, tripple or quad relais module from dx.com, Alibaba or Amazon


==a==Using 5 V control voltage from Arduino ==a==

For 5 V systems like [[Arduino]] connect Vcc to 5 V and set the JD-VCC jumper.

The inputs are low-active. The microcontroll must deliver a low level to activate the relais.

{{image url="images/Relaisboard.jpg" alt=""}}


==a==Using 3.3 V control voltage from Raspberry Pi==a==

For 3.3 V systems like Raspberry Pi remove the JD-VCC jumper. Conect 5 V to the JD-VCC side of the jumper. 
Connect 3.3 V to VCC.
 

==a==Circuit==a==

{{image url="images/RelaisboardCircuit.jpg" alt=""}}


==a==Relais ratings==a==

{{image url="images/RelaisboardRelais.jpg" alt=""}}

SRD-05VDC-SL-C says
	- SRD: relais model 
	- 05VDC: Voltage  the relais coil should be 5 V (this is JD-VCC)
	- S:Sealed type 
	- L: coil power consumption is 0.36 W
	- C: Contact form type C 


10A 250VAC 10A 125 VAC says: The voltage at the relais contacts should not exceed 250 V and 10 A for alternating current

10A 30VDC 10A 28 VDC says:  The voltage at the relais contacts should not exceed 30 V and 10 A for direct current


==a==Power consumption==a==

71.4 mA was found in the [[https://www.ghielectronics.com/downloads/man/20084141716341001RelayX1.pdf data sheet]].
I was measuring 80 mA per channel when active (relais on). 


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