how to turn a 12v-ac water pump on-off? Solid State Relay or Relay?

I have a 8 relay module used last time for a 6V DC water pump

This time i would like to switch on-off a AC water pump

The pump is Aqua One Maxi Power Head 102 12V-AC, 50H

I followed my previous wiring (attached diagram)
but the 12V-AC pump not powered

I search on web, and found many AC project used Solid State Relay
It seems to convert DC to AC

Question:

  1. my relay does not work with AC pump?
  2. buy a Solid State Relay?
  3. if i brought a Solid State Relay, does it need to connect to my relay (Arduino → Relay → SSR → AC pump)?

thx

Either one will work.

A solid state relay can be connected directly to the Arduino as long as it's rated for 5V control voltage (very common for SSRs).

Solid state relays are optically isolated and they have an internal LED. Most SSRs have in internal current limiting resistor for the LED, but some require an external resistor so check the specs.

The "output" side of a solid state relay is more critical than a mechanical relay. If you are switching AC, the relay must be rated for switching AC, and if you are switching DC, it must be rated to switch DC. SSRs sometimes have a minimum voltage so a 120/240VAC SSR may not work with 12VAC. Again, check the specs.

I search on web, and found many AC project used Solid State Relay
It seems to convert DC to AC

No... But with a relay (mechanical or solid state) you can control AC with DC, or vice-versa.

DVDdoug:
Either one will work.

A solid state relay can be connected directly to the Arduino as long as it's rated for 5V control voltage (very common for SSRs).

Solid state relays are optically isolated and they have an internal LED. Most SSRs have in internal current limiting resistor for the LED, but some require an external resistor so check the specs.

The "output" side of a solid state relay is more critical than a mechanical relay. If you are switching AC, the relay must be rated for switching AC, and if you are switching DC, it must be rated to switch DC. SSRs sometimes have a minimum voltage so a 120/240VAC SSR may not work with 12VAC. Again, check the specs.
No... But with a relay (mechanical or solid state) you can control AC with DC, or vice-versa.

thx for quick response

if a Relay module would work for powering AC pump

and my 8 relay module is SRD-12VDC-SL-C
on it's label:
10A 250VAC 10A 125VAC
10A 30VDC 10A 28VDC

what do you think my problem is?
why my wiring not work for AC pump? (with a IN: 100-240V 1.6A 50-60Hz 12V DC power supply)

any solution plz?

I followed my previous wiring (attached diagram)
but the 12V-AC pump not powered

You will need to switch one line of the 12VAC from COM to NO.

EDIT: Diagram deleted (incorrect)

because what i tried before is DC positive to COM
did you mean move DC positive to NC?

it didn’t work like the diagram below

You are supplying 12v to JDVCC! This is supposed to be 5v. I suspect you’ve blown some components on the control circuitry.

KenF:
You are supplying 12v to JDVCC! This is supposed to be 5v. I suspect you've blown some components on the control circuitry.

originally, VCC & JDVCC (at the bottom right) is pin shorted

last time i remove the jumper and supply 6v DC to JDVCC, it works work with the DC motor(at the same time, the centre VCC to 5V Arduino)

what do you think i should do this time?

yashiharu:
last time i remove the jumper and supply 6v DC to JDVCC, it works work with the DC motor(at the same time, the centre VCC to 5V Arduino)

The power required by the motor and the power required by the control circuitry on the relay board are two separate things. 6v is probably OK but 12v is pushing your luck.

First thing I'd do is check out the relay board to see if it's still functioning.
Hookup 5v to VCC.
Replace the jumper to supply JDVC from VCC.
connect GND to GND,
then using a jumper wire attached to Gnd, touch each of the input pins one by one.

If you don't hear the relays click as you do this, something is broken.

KenF:
The power required by the motor and the power required by the control circuitry on the relay board are two separate things. 6v is probably OK but 12v is pushing your luck.

First thing I'd do is check out the relay board to see if it's still functioning.
Hookup 5v to VCC.
Replace the jumper to supply JDVC from VCC.
connect GND to GND,
then using a jumper wire attached to Gnd, touch each of the input pins one by one.

If you don't hear the relays click as you do this, something is broken.

if i do so, there will be no trigger click sound ... only the LED is working

With my wiring, it works fine.

What i want is to power up a 12V-AC pump
so the relay should separately powered through JDVCC with 12V-DC+ and GND with 12V-DC-, right?

because what i tried before is DC positive to COM
did you mean move DC positive to NC?

Your diagram shows NO and NC ... this could never work.

Should be NO and COM (outermost relay terminals) for normally OFF operation.
Energizing relay switches the load ON

Should be NC and COM for normally ON operation.
Energizing relay switches the load OFF

dlloyd:
Your diagram shows NO and NC ... this could never work.

Should be NO and COM (outermost relay terminals) for normally OFF operation.
Energizing relay switches the load ON

Should be NC and COM for normally ON operation.
Energizing relay switches the load OFF

Would you please take a look on my #1 diagram
I think it is NC, COM, NO (from left to right)
#1 diagram is work for my DC motor

is the wiring correct for AC-pump too?

The white silkscreen is actually a diagram of the contacts:
So its NO, NC, COM. Oops ... NO, COM, NC

am i the same COM NO NC ?

See image

KenF:
See image

thx for the diagram

i followed your guide

a) just unattach that JDVCC from 12VDC power, no click trigger sound

b) unattach that JDVCC from 12VDC power AND jumper connect that JDVCC & VCC, no click trigger sound

am i the same COM NO NC ?

From the picture, it shows NO, NC, COM (left to right). Oops again, NO, COM, NC

With a multimeter, you could do a continuity test or measure the resistance from COM to NC, then COM to NO.

dlloyd:
From the picture, it shows NO, NC, COM (left to right).

then i should have the same relay layout like yours at #3

i tried again, click sound, but the AC-pump not work

dlloyd:
With a multimeter, you could do a continuity test or measure the resistance from COM to NC, then COM to NO.

i have no multimeter, and never use it before.

i would like to know if SSR is a easier way to go?

Sorry, its NO, COM, NC.
I'm being interrupted from the PC ... will post back ...