I’m starting to put together the parts to build the soft off/on (suicide) switch, and I am in no way, shape or form an electrical engineer. Looking at Bjoern’s parts list for the mod, I believe the SSR can be swapped for a 10 amp (much cheaper, and with a 500 watt power supply I believe the machine shouldn’t be pulling any more than 5 amps). Can anyone smarter than me at electronics confirm that that makes sense?
I’m also looking at a 2 color lit momentary button, rather than the separate LEDs and button. But the buttons I can find are made for 12v with common cathode pinout (that part should be fine). My big question mark is if running the circuit off 12v (powered by external adapter) would work without cooking anything, or if the circuit has to have the 9v supply for the soft circuit. secondarily, what would a 12v vs 9v do to the resistor values in the diagram.
Any help would be greatly appreciated.
Further update while looking at parts… goal is to use an AC/DC adapter mounted in the machine pulling power from the factory rocker switch. Initial plan is a 16 or 19 mm power button (red when off, blue when on) that will mount in the touchscreen bracket (facing forward, right next to the 40/40 extrusion that the bracket mounts to). This will simplify wire routing (shorter and can use the wire entry for the touch screen). Regardless, I’ll be working at this slowly and see what I can come up with.
I don’t think so - there might be an inrush current that could be much higher than the typical AC current. So a bit of reserve capacity is a good idea. I used a 20 amps SSR in my SV04. H. Peter Anvin recommends a SSR with a minimum of 15 amps in his version of the suicide switch. erhaps it would be interesting for you to take a look - it seems to use a same type of two colors push button.
I never used such a type of push button. Using my suicide switch circuit you could do a 9V test and try to adjust the resistors R2 & R3 if needed to get it into a working state.
Good luck!
Björn