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  1. K

    Help putting timer on my welder

    Gunit, What make/model MIG are you wanting to add the timer to. Sometimes there are block schematics for "major" brand machines. I read about "Spot" and "Stich" settings on MIGs. I'm curious because I made a pulser for a Miller TIG. It actually switches between high and low current pulses...
  2. K

    Help putting timer on my welder

    What's the purpose of those long time intervals on a MIG? Ken
  3. K

    Homemade Slow Blow Fuse

    Research "Polyfuse" Ken
  4. K

    Homemade Slow Blow Fuse

    Looks like a home brew thermal "flasher" switch. Currents heats up the bi-metal leg. The leg bends, breaking contact with the other leg and opens the circuit. No current flows. The bi-metal leg cools, unbends, contacts the other leg, closing the circuit. And the cycles repeats. Ken
  5. K

    Remote control electric motors

    "DPDT contacts rated 30A (N.O.) 3A (N.C.) @ 277Vac. 1HP 120Vac:" Rated for 1HP Ken
  6. K

    Remote control electric motors

    This should work and is cheap: https://www.allelectronics.com/item/rly-654/12vdc-dpdt-30a-power-relay/1.html Ken
  7. K

    Remote control electric motors

    Not really any more simple. The external relays are only necessary if the internal ones can't handle the voltages and currents And that is probably the case with the information you have provided. Unfortunately most of the cheap remote receivers don't provide that spec. So just assume that...
  8. K

    Remote control electric motors

    I think you're confusing the voltage that activates the relays coils and the voltage that the relay contacts are switching. Pick a remote system that will meet you channel #, ON/OFF function, and range. Then we can work on what more you need. Ken
  9. K

    Remote control electric motors

    For switching 110VAC what you will need is a 12VDC coil relay with contacts rated at 110VAC or higher and 15A or higher (for a 2HP motor). For switching 12VDC you will need 12VDC coil relays with contacts rated at 12vDC or greater and whatever current you are switching. Ken
  10. K

    Remote control electric motors

    Not likely to be able to add an external antenna. What distance maximum do you think you need? Something like that might work. You would need to add external 12vdc relays to switch your loads. No indication what voltage and current the internal relays can switch. Ken
  11. K

    Remote control electric motors

    Do you want each channel to be momentary (ON as long as button is held) or toggle ON/OFF with each push? You would attach external relays to the receiver relays, that are capable of switching the high current 12VDC or the 110VAC. Ken
  12. K

    Remote control electric motors

    Is the unit you are trying to work with, the one in the video. One step further back...what are you trying to control? Ken
  13. K

    MOSFET Issues

    Have you tried just driving the gate with a higher fixed Vg...like +12v? Ken
  14. K

    MOSFET Issues

    Do you get 3.8A if you connect the battery and resistor in series, without the MOSFET? What happens to the battery voltage under the the 1Ω load? Ken
  15. K

    Remote control electric motors

    Have the remote control system switch relays. Then have the relays switch 12vdc and 110VAC devices. Ken
  16. K

    Adding a timer somehow to a 12v solenoid

    No. Those are "on/off" cycle timer. When running it goes On...OFF...ON...OFF...forever. The delivery time on mine may be long, but I don't see a better source. Ken
  17. K

    Adding a timer somehow to a 12v solenoid

    This is a cheap, off the shelf, timer module that I think will do what you want for a minimum of electronics knowledge. https://www.ebay.com/itm/DC-5V-12V-24V-Signal-Off-Delay-Timing-Timer-Relay-Switch-Delay-Turn-Off-Module-/263040578047 Ken
  18. K

    Adding a timer somehow to a 12v solenoid

    OK, here is a version of circuits I've used for simple timed (monostable) relay switches. You would need to play with R1 and C1 for the exact timing. Pressing the new push button switch will turn on the solenoid. The timing will start after you let up on the push button. Ken
  19. K

    Adding a timer somehow to a 12v solenoid

    If a series circuit is how it's arranged, is the PB switch in the +24V -to- solenoid wire, or solenoid -to- -24V wire? Ken
  20. K

    Adding a timer somehow to a 12v solenoid

    Details please? What voltage (AC?...DC?) and current for the solenoid? Assume just a series circuit?: 12V > switch > solenoid > 12V return Ken
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