Timeline for Is there any reason NOT to use SPDT switches with RPi?
Current License: CC BY-SA 4.0
9 events
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| Apr 1, 2020 at 17:24 | comment | added | Roger Sinasohn | @DmitryGrigoryev - The difference between what I want to do and your diagram is that CircuitLab's SPDT switch is ON-ON (or ON-MOM) whereas the switches I'm planning on using are MOM-OFF-MOM. (I couldn't find a symbol for that in CircuitLab.) So it will normally be off (like an NO pushbutton) for both connections but can connect to either one or the other connection. In theory, it won't be able to connect to both at the same time. | |
| Apr 1, 2020 at 17:17 | comment | added | Roger Sinasohn | @nekomatic - I had not heard of "make-before-break" switches. That's the sort of issue I wouldn't have thought of, not being a hardware guy. I'll check for that. Thanks! | |
| Mar 31, 2020 at 17:19 | comment | added | supercat | @DmitryGrigoryev: A guitar with two pickups will usually have a 3-position make-before-break switch, wired to select #1 only, both pickups, or #2 only. | |
| Mar 31, 2020 at 15:35 | comment | added | nekomatic |
See digikey.com/products/en/switches/slide-switches/213 and choose Shorting (MBB) in the Contact Timing filter, for example.
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| Mar 31, 2020 at 13:26 | comment | added | Dmitry Grigoryev | @nekomatic Do you have an example of such a 'make-before-break' SPDT? | |
| Mar 31, 2020 at 11:56 | comment | added | nekomatic | It is not necessarily true that the common of an SPDT switch is never connected to both poles at once. I think toggle switches pretty much always have 'break-before-make' behaviour but slide switches may well 'make-before-break', and rotary switches can be found in both varieties. It may not be obvious why you would want make-before-break but there are situations where it would be the preferred behaviour. | |
| Mar 31, 2020 at 10:29 | history | edited | Dmitry Grigoryev | CC BY-SA 4.0 |
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| Mar 31, 2020 at 10:10 | history | edited | Dmitry Grigoryev | CC BY-SA 4.0 |
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| Mar 31, 2020 at 10:04 | history | answered | Dmitry Grigoryev | CC BY-SA 4.0 |