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.
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)
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?
