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24V 5A 3-state capacitive touch switch (not a dimmer, without relay)

oslosl

Jan 13, 2023
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Jan 13, 2023
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Anybody know where I can buy or how I can make a 24V 5A 3-state capacitive touch switch (not a dimmer, without relay) ?
It has to work like a on1-off-on2 switch. It is for a speaker with batteries:
1. off
2. audio on
3. audio and lighting on.
It has to have very low standby power consumption.
I can only find this, but it is only on-off and also a dimmer: https://www.aliexpress.com/item/4000102100042.html
 
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Bluejets

Oct 5, 2014
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Oct 5, 2014
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Switching part easy enough with an Arduino and a cap sensor and some code.
Don't know about the "without a relay" part.
One can get relays with low coil current for battery operation.
Almost essential when mixing the switching between audio and power circuits.

Off the shelf I very much doubt..............
 

kellys_eye

Jun 25, 2010
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Switching DC and audio is easily (and commonly) achieved using FETs/MOSFETs these days. There are also dedicated ICs for the purpose of capacitive switching - search the datasheet suppliers using their filters.
 

oslosl

Jan 13, 2023
9
Joined
Jan 13, 2023
Messages
9
Switching DC and audio is easily (and commonly) achieved using FETs/MOSFETs these days. There are also dedicated ICs for the purpose of capacitive switching - search the datasheet suppliers using their filters.
Thanks. Any PCB layouts ? It just have to feed 24v til BT amplifier in 2. and 24v to BT amplifier and LEDs in 3.
 
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