I have a shop tool switch that has 2 momentary switches independent of each other. The NC momentary switch is for the red OFF button, and NO momentary switch for the green ON button. I want to use a 555 to make a dependable on-off switch that will power a DC to AC SSR.
Although I'm only running a shop vac with it, someone else may run shop equipment or CNC and so I would like to make sure that it's resistant to power surge and brownout failures. e.g. safely and reliably switches on/off when it's supposed to.
During a quick brownout I would like the switch to stay ON for maybe 250 to 300ms, but otherwise switch off.
If someone has an example schematic or URL that I'm unable to find so far, I'd appreciate the help. My biggest difficulty with this is how to use the NC for the Reset. Also, any suggestions to keep this safe and reliable is appreciated. E.g. resistor and caps used on the SSR and 555 pins.
I've never used an NTC Thermistor before. Any advice on best practice for the SSR output to a motor and/or surge protection on the DC line input is nice to know.
Thanks in advance for any help offered.
Although I'm only running a shop vac with it, someone else may run shop equipment or CNC and so I would like to make sure that it's resistant to power surge and brownout failures. e.g. safely and reliably switches on/off when it's supposed to.
During a quick brownout I would like the switch to stay ON for maybe 250 to 300ms, but otherwise switch off.
If someone has an example schematic or URL that I'm unable to find so far, I'd appreciate the help. My biggest difficulty with this is how to use the NC for the Reset. Also, any suggestions to keep this safe and reliable is appreciated. E.g. resistor and caps used on the SSR and 555 pins.
I've never used an NTC Thermistor before. Any advice on best practice for the SSR output to a motor and/or surge protection on the DC line input is nice to know.
Thanks in advance for any help offered.