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I wrote: No, I see that the model is in the schematic already.? But the symbol is missing. Andy

Use a Schmitt trigger circuit to monitor the +12 V line with hysteresis, and another Schmitt trigger circuit to monitor the -12 V line with hysteresis. Andy

The schematic is missing the TL431 symbol, and perhaps its model. Andy

OK, I deleted the 10V supply, and tied the Vcc pin of the voltage monitor to the +Vin supply. Then, insert a 4-6 volt (I used 4.7V 1N750) in series with the Opto coupler LED drive line and the upper

Hello , the circuit bellow does what needs to be done. As shown below and in LTspice files. I want to try and use the shmidt trigger idia also and compare. How do conpvert the shmidt trigger circuit

Hello Terry , You put 10V in the Vcc. I only have the slow rising +12V -12V sources. What could be done?

That's a bad idea. The file someone downloads might not match the one you used.? That's especially true a year or two from now when someone comes across your files and can't get them to work. Also,

Ok Andy. I changed the Vcc for the voltage monitor chip (MC33161) to the positive input supply...and the cycle failed when the V+ supply dropped below 3-4 Volts while the V- supply was still a few

The following items have been added to the Files area of the [email protected] group. * /VoltageMonitorSpice/DMG6602SVTQ_N.asy (

Hello Terry, also I dont have 10V VCC. I only have my +12V -12V what should i put in the chip? Thanks.

Hello Terry,Here is a link to the great photo you sent. Could you please send the LTspice files? Thanks. https://www.mouser.com/datasheet/2/308/1/MC34161_D-2315674.pdf

OK, I put a screen shot on the Groups,io photo link...titled "Power God Switch" You can easily find the datasheets, but if needed, I can send the LTspice model files. Terry

The following photos have been uploaded to the Power Good switch ( /g/electronics101/album?id=298497 ) photo album of the [email protected] group. * Capture.JPG (

I don't recall that you had a D flop.? Did you? In any event, you should separate the two things you want done: * Triggering on specific voltages, and * The SR flop or D flop logic operation.

Terry, I think you are trying to attach screenshots to your messages.? This group strips anything attached to the messages, so your screenshots never made it.? They were removed at the server.

Hello, Terry there is no NCV33361 component and unfortunetly the massage you posted doesnt have any ltspice simulation circuit. Hello Andy , Yes you are corrent if we have sudden overshoot it will not

I'm unsure why the attachments are not coming through the groups.io link. How do I attach a file using this link? Terry WA7LGY

What your picture shows is the two "input" signals V(in+) and V(in-) each ramp towards +12 V and -12 V respectively, and then the outputs suddenly switch ON. That's fine, but you need to remember that

I tried, didn't work. Let's try again. I think this is what you are describing. The NCV33361 is a positive and negative power supply monitor setup so the Out1 pin is saturated when the IN1 is less the

Hello Terry, You didnt give any link to a circuit :-)