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1  Community / Products and Services / Re: 5V Relay Board 8 Channel Connections .. HELP on: September 06, 2012, 07:38:56 am

If your actual application can have a requirement to turn all 8 outputs on at the same time then >4 amps is the answer. If only a single coil is going to be energized at any given time then a 1 amp supply would work.

Lefty



Thanks again Lefty... cheers  smiley-cool
2  Community / Products and Services / Re: 5V Relay Board 8 Channel Connections .. HELP on: September 05, 2012, 08:36:46 pm

Hi JanaLaine,

Nice documentation of what You want to do!

But if my old eyes don't trick me, You mixed up the + and - of the 12 Volt supply to Your "external" valves.

0V must go to - minus of Your Valve coil and the + plus 12V get switched by the relays contacts and than must be connected to the +plus of the valves coil.

(+0V as You write is yes the Zero of the + PLUS 12 Volt supply, but "more" negative then the plus 12 Volt.)

rgds

Thanks for reminding me about the polarity. i missed that one out... -ve of the valve should be connected to -ve PS. thanks for that  smiley-cool

1 more question, if, let say, i have about 8 solenoid valve 12VDC, 500mA. What type of power supply should i buy?

- 12VDC, 1A? or 12VDC 4A?

Thanks again,
Jana
3  Community / Products and Services / Re: 5V Relay Board 8 Channel Connections .. HELP on: September 05, 2012, 08:34:14 pm
Looks all correct to me.

Lefty

Thanks..  smiley-cool
4  Community / Products and Services / 5V Relay Board 8 Channel Connections .. HELP on: September 05, 2012, 01:43:36 am
Hi,

I recently bought this relay board, but i am not sure about the connections. Can you check my wiring diagram please.. smiley-grin

EDIT: i will be using 12VDC solenoid valve, 500mA

EDIT: Board Description added

This is what i bought:



And here's the description of the board (from http://arduino-info.wikispaces.com/ArduinoPower)



and this is my wiring diagram:


Thanks,
Jana
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