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How do I?? / Make an Interval Timer for my Harbor Freight 220 Volt Spot Welder?
« Last post by vtsteam on June 13, 2025, 09:42:04 AM »I'd like to make an interval timer for my Harbor Freight 220 volt spot welder. I have a couple of timers coming in the mail. They use mechanical relays. Here's a pic:
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Specifications:
Operating voltage: DC 6V - 30V, supporting micro USB 5V power supply
Operating current: 50mA, static current: 20mA
Working temperature: -20—60℃
NO maximum load: < AC 250V/10A, < DC 30V/10A
Size: 6.4*3.8*1.7cm
HOWEVER:
I'm guessing that triggering the inductive load of the 220V line of the spot welder might be too much for the relay, so I was going to add a second solid state relay, which would be triggered from the timer's relay. Maybe this one....
[ You are not allowed to view attachments ]
Twidec/Output Single Phase SSR Solid State Relay
100A
3-32V DC to
24-480V AC
SSR-100DA
BUT, I was wondering if I could eliminate the middle man (the timer's mechanical relay) maybe desolder it and then just hard wire the relay coil's lines to the inputs of the 100 amp solid state relay?
Thanks
[ You are not allowed to view attachments ]
Specifications:
Operating voltage: DC 6V - 30V, supporting micro USB 5V power supply
Operating current: 50mA, static current: 20mA
Working temperature: -20—60℃
NO maximum load: < AC 250V/10A, < DC 30V/10A
Size: 6.4*3.8*1.7cm
HOWEVER:
I'm guessing that triggering the inductive load of the 220V line of the spot welder might be too much for the relay, so I was going to add a second solid state relay, which would be triggered from the timer's relay. Maybe this one....
[ You are not allowed to view attachments ]
Twidec/Output Single Phase SSR Solid State Relay
100A
3-32V DC to
24-480V AC
SSR-100DA
BUT, I was wondering if I could eliminate the middle man (the timer's mechanical relay) maybe desolder it and then just hard wire the relay coil's lines to the inputs of the 100 amp solid state relay?
Thanks