Timeline for A dual-input solid-state switch that will reliably work in a car
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Jan 24, 2016 at 11:52 | comment | added | Violet Giraffe | I understand that. What I don't understand is: 1. D5 works by shorting voltage spikes to ground. Won't it blow a fuse by doing so? It is said the spikes can last as long as 400 ms: littelfuse.com/~/media/electronics_technical/application_notes/… And 2: will the D1 and D3 withstand a 100 V reverse polarity spike? From what I heard, pretty much all diodes are fragile when it comes to reverse voltage. | |
| Jan 24, 2016 at 11:28 | comment | added | Marko Buršič | Yep, this is how can I draw in CircuitLab. D1 is the input for 3.3V signal, D3 is the input for 12V signal, both common ground. D5 is a transient suppressor diode that cuts the spike. The boxed element is photo relay, photo mosfet, photomos,...or wahtetever this new technology is called. The LED iluminates the photovoltaic array that produces drive volatge for the output mosfets in configuration ala AC switch. | |
| Jan 24, 2016 at 11:20 | comment | added | Violet Giraffe | If I could understand what this thing does... A couple questions. 1. What are D1 and D3 for, and will they withstand the voltage spikes? Same question about D4, btw. 2. Won't D5 cause a fuse to blow (or blow itself) when activated? 3. Why 2 serial MOSFETs? | |
| Jan 24, 2016 at 11:11 | history | answered | Marko Buršič | CC BY-SA 3.0 |