Audio FX Sound Board Triggers

[ashleyjamesbrown]

No it does not. (ive been away so only just able to test)


SO i had the invertor wired up as in previous pictures. The 2 pins coming down from the circuit were into a push button. This worked, i press down the button and it fired the audio on pin0. If i hold the button down it constantly triggers (becuase of the type of file im assuming - i know i can change them)

SO on the breadboard i pulled out the push button and put the capacitive touch sensor in its place and it just constantly triggers - like it has closed the circuit (without touching it i mean). Touching has no effect (it doesnt reverse it i.e turn it off)

So im wondering whether the invertor is wrong ( first guess is surely the push button being inverted should pull down and therefore make it constantly trigger ??) or does the cap sensor not need inverting at all. I tried directly putting the cap sensor into the board but could not figure out which combo of wires to use to hook it up.

What i need - is the cap sensor instead of the switch. Touch and that triggers the audio.

[adafruit_support_rick]

Looking at your pictures, the inverter looks right. You're taking a high signal on the base (from the pushbutton), and inverting it to trigger the sound board.

Which cap touch switch do you have? Can you post some picture of how you have it wired?

[ashleyjamesbrown]

I have the AT42QT1010 Momentary Cap Switch.

Here is the circuit with the push switch. press to trigger sound held in 0 on the board. Works fine.

IMG_20150422_162045.jpg (935.48 KiB) Viewed 544 times

SO im trying to swap those 2 pins - remove the button and use the cap sensor and it doesnt work - it just fires constantly without even touching (to mimic - if i hold the button down thats what it does) and touching does nothing to stop it or change it. Im using the GND and VCC pins on the cap sensor.

[ashleyjamesbrown]

IMG_20150422_164626.jpg (708.92 KiB) Viewed 544 times

Heres my wiring with the cap sensor.

[adafruit_support_rick]

Looks like you have GND on the switch connected to the transistor base. You want to connect OUT to the transistor base, and GND to GND.

[ashleyjamesbrown]

Looks like you have GND on the switch connected to the transistor base. You want to connect OUT to the transistor base, and GND to GND.

Ok i tried three different combos and still nothing working.

Ill post each of the pictures of what i tried.

[ashleyjamesbrown]

IMG_20150424_124820.jpg (776.12 KiB) Viewed 496 times

IMG_20150424_124834.jpg (962.55 KiB) Viewed 496 times

So im assuming the power lead must go somewhere - the minute i take power from the side of the transistor or even direct from the boards vIN then it constantly fires , even though im not touching.

Im sure its not wired up right , i cant figure out what ive done wrong.

[adafruit_support_rick]

You need GND, VDD, and OUT. You don't have VDD in those pictures. Keep the wires away from the touch-pad.

So, when you connect VDD, it constantly fires. Does the LED on the touch pad light up while this is happening?

[ashleyjamesbrown]

You need GND, VDD, and OUT. You don't have VDD in those pictures. Keep the wires away from the touch-pad.

So, when you connect VDD, it constantly fires. Does the LED on the touch pad light up while this is happening?

The LED does NOT light up no. The minute i attach the VDD it constantly fires the audio board, even with or without the GDD connected.

[ashleyjamesbrown]

IMG_20150424_160141.jpg (874.2 KiB) Viewed 477 times

Doesnt matter where the GND goes, makes no difference. Pull the VDD out from the Cap Sensor and it stops firing.
At no time does the LED come on - EVEN if i touch it.

I really think that it is wired wrong - or it cannot work. Im hoping for the former - in this case there is a solution.

[adafruit_support_rick]

Wire OUT directly to the Audio Board and see what happens. Bypass the inverter.

[ashleyjamesbrown]

Wire OUT directly to the Audio Board and see what happens. Bypass the inverter.

Exactly the same. Constant firing.

[ashleyjamesbrown]

Im really at a loss

[adafruit_support_rick]

Here's how it's supposed to look:

CapTouch_Audio_FX.png (59.42 KiB) Viewed 446 times

[ashleyjamesbrown]

Just to check - the transistor im using are these. BC547. NPN. These are ok right ?

http://www.arduino.cc/documents/datasheets/BC547.pdf