5V Relay Board 8 Channel Connections .. HELP

Hi,

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

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

Looks all correct to me.

Lefty

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

retrolefty:
Looks all correct to me.

Lefty

Thanks.. 8)

Ogoh_Ogoh:
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 8)

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

JanaLaine:

Ogoh_Ogoh:
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 8)

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?

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,
Jana

retrolefty:

JanaLaine:

Ogoh_Ogoh:
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 8)