hello
i'm looking for help with schematics for getting the most alternate value combinations out of capacitor switching using
- single pole on/off/on ,
-single pole on/on .
and maybe even double pole switching combinations for future projects if any one has any schematics.
I have been using 1pole 5position rotary switches for a 10n...... 100n switching though am looking for an easier way with getting the best from a single pole on/off/on or a single pole on/on, any help with a wiring schematic would be great thank you.
heres a photo of what i have been previously wiring for any one looking for interest sake.
I was also wondering when its best in circuits and what can be gained from using capacitor and coupling capacitor switching verses using resistor switching in lp /hp filtering instead. if it is all round better to use resistor switching? please excuse my lack of knowledge i am about 50% trial and error.
i'm looking for help with schematics for getting the most alternate value combinations out of capacitor switching using
- single pole on/off/on ,
-single pole on/on .
and maybe even double pole switching combinations for future projects if any one has any schematics.
I have been using 1pole 5position rotary switches for a 10n...... 100n switching though am looking for an easier way with getting the best from a single pole on/off/on or a single pole on/on, any help with a wiring schematic would be great thank you.
heres a photo of what i have been previously wiring for any one looking for interest sake.
I was also wondering when its best in circuits and what can be gained from using capacitor and coupling capacitor switching verses using resistor switching in lp /hp filtering instead. if it is all round better to use resistor switching? please excuse my lack of knowledge i am about 50% trial and error.
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I don't really understand what the problem is, but maybe you can explain better what the issue is after you review 'break before make' and 'make before break' switching.
In general resistor switching is cheaper and better, because resistors are lower cost and more 'ideal' than caps. Resistors are available in 0.1% tolerance if that matters to you, try that with caps.
Jan
In general resistor switching is cheaper and better, because resistors are lower cost and more 'ideal' than caps. Resistors are available in 0.1% tolerance if that matters to you, try that with caps.
Jan
Are you looking to minimize the number of precision capacitors even at the cost of more complex switching?
Binary will be most efficient for a 1..2..3....10 sequence, even though four switches gives 16 values and you may only want 10.
hi,
have been using in active circuit for guitar preamp switching coupling values awhile back, looking for easier options for future audio projects
hi,
wow the binary switching is quite interesting, I was thinking to try use mostly the spdt switches i have in the top half of this photo. i can get two switching combinations from the on/on. was hoping there was a way to get three different values from the single on /on or on/off/on. maybe i could run the switching parallel to the circuit some how adding two values to a fixed existing value,
edit, figure 3 value from spdt on/off/on (photo 2)
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I had the same idea as your photo 2. As long as you don't need one of your three values to be zero capacitance, that will work, and give you three different capacitances if you choose the three caps appropriately. For example, 10 nF, 10 nF, and 22 nF will give you three values of either 10 nF, 20 nF, or 32 nF.
If you want the guitar to be usable in live situations, I would stay away from extremely "clever" - but complex - switching arrangements (such as binary switching). Otherwise, in the heat of a live performance, it is quite possible to forget how to set the controls properly.
As an example, I had a friend who replaced the 5-way toggle switch in his Stratocaster with three separate SPST toggle switches. This gave him the ability to individually switch in the neck pickup, the middle pickup, or the bridge pickup, or any combination of any two of them, or all three pickups simultaneously.
What a great idea! Until, that is, he accidentally put all three toggle switches in the "off" position, live, on-stage, in mid-set. Of course his guitar went silent, and he had no idea why. 😳
With a waiting audience, and the resulting high stress and adrenaline levels, it took him what seemed like minutes on end, wildly twiddling amplifier knobs, plugging and unplugging guitar cables, turning guitar volume and tone pots up and down, before he eventually figured out what the problem was.
For live use, fool-proof is far better than "clever but complicated"!
The idea in your last diagram is fool-proof. Even if you forget how to set the switch for the capacitance you want, you'll still get some sort of usable sound out of the guitar. That's a good thing.
-Gnobuddy
If you want the guitar to be usable in live situations, I would stay away from extremely "clever" - but complex - switching arrangements (such as binary switching). Otherwise, in the heat of a live performance, it is quite possible to forget how to set the controls properly.
As an example, I had a friend who replaced the 5-way toggle switch in his Stratocaster with three separate SPST toggle switches. This gave him the ability to individually switch in the neck pickup, the middle pickup, or the bridge pickup, or any combination of any two of them, or all three pickups simultaneously.
What a great idea! Until, that is, he accidentally put all three toggle switches in the "off" position, live, on-stage, in mid-set. Of course his guitar went silent, and he had no idea why. 😳
With a waiting audience, and the resulting high stress and adrenaline levels, it took him what seemed like minutes on end, wildly twiddling amplifier knobs, plugging and unplugging guitar cables, turning guitar volume and tone pots up and down, before he eventually figured out what the problem was.
For live use, fool-proof is far better than "clever but complicated"!
The idea in your last diagram is fool-proof. Even if you forget how to set the switch for the capacitance you want, you'll still get some sort of usable sound out of the guitar. That's a good thing.
-Gnobuddy
if you want adjustable filter, then just make adjustable filter
otherwise known as tone control.
or multiple other variable filters.
otherwise known as tone control.
or multiple other variable filters.