All Questions
9 questions
0
votes
2
answers
130
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Trigger a 3 V line with 12 V
I would like to trigger a 3 V line (a push dimmer circuit) with a touch button (which is powered by 12 V).
Closing the 3 V will turn off (short press)/turn on (short press)/dim (long press) the LED ...
- 3
0
votes
0
answers
59
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What is this component and what function does it serve?
I am learning to build a touch switch using a TRIAC. I took apart a commercial switch that is activated by touching the thin white wire.
I identified all the components, except one (the one that I ...
- 1
1
vote
1
answer
65
views
Is there a single cycle wave trigger circuit?
Is there a circuit design where if the input is high (at any length of time), the output will only be one cycle at a fix amount of time?
I'm currently working on a capacitive touch switch (I'll use ...
- 11
0
votes
2
answers
641
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Bypass touch sensor IC with a button?
I want to replace a capacitive touch sensor on a circuit board (I think it’s a TTP223) with a tactile switch to overcome over/under sensitivity issues. I have wired a switch to ground and the CMOS ...
1
vote
1
answer
104
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Touch switch for hanging lamp (touching metal bar): Ideas?
A few years ago, we have bought an IKEA Glimt hanging lamp that operates with halogen lamps. It has a "touch dim" functionality, so when a person touches the metal bar of the lamp, it dims (...
- 11
0
votes
1
answer
377
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Use Mosfet as a touch switch
I would like to use N-channel as a touch switch which will be an input to the microcontroller. Currenty I am concerning about power draw. The whole device will be in metal case and I am planing to ...
user208862
-1
votes
1
answer
862
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Bypass touch switch on humidifier circuit board
i have a simple humidifier that only powers on by a touch sensitive switch.
I need to bypass it because when the power is off after that the device doesnt start automatically.
I tried some things but ...
0
votes
1
answer
80
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Trying to identify a component in a 12 volt LED on/off touch switch
I'm wondering if anyone can help me identify what this 8 pin IC is, in a capacitive on/off touch switch I have. It is a soic or 8-VSSOP package. 64RX-Y is written on the bottom of the IC, nothing on ...
1
vote
1
answer
132
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Understanding Touch Switch with BJTs and Relay
We worked on this circuit today in one of my labs and it had my groupmates and I puzzled. We had a 1k resistor in series with an LED on the NO side of the relay.
I searched for the circuit online and ...
- 541