beerzinnss
- Sep 26, 2016
- 8
- Joined
- Sep 26, 2016
- Messages
- 8
Hi!
I am trying to control a bluetooth amplifier board with an arduino. The amplifier board has five buttons (vol+, vol-, next, prev, play/pause). To control them with arduino, I am going to use an optocoupler (4N35).
I desoldered the buttons, soldered short wires to the respective pads. Now I have some problems that I don't understand, maybe you can help:
1) vol+ and vol- work when touching the wires, BUT when i separate them, if I keep holding the wires (even by the insulation) it keeps being pressed. stops when I let go.
2) other three buttons don't work when touching the wires, in fact the bluetooth module restarts when "play/pause" wires are connected for more than ~5secs. BUT they do work if I touch the pad directly with the other wire.
So now I'm confused, are the wires the problem? is it worth trying other wires? (these are from an HDMI cable)
I tried connecting the optocoupler and arduino on a breadboard, it behaves the same as when I'm touching the wires - volume buttons work, others don't, if play/pause is connected for 5-10seconds, the module restarts.
I am an absolute beginner in electronics, so any help is appreciated.
see attachments below. Thank you!
bluetooth amplifier board - http://www.ebay.com/itm/TDA7492P-AU...015219?hash=item1c730868b3:g:K7AAAOSwux5YS5~W
CSR8635 Bluetooth chip datasheet - http://electrothing.co.za/images/products/bluetooth-audio-module-8/CSR8635-datasheet.pdf
photo of the wires on the amp -
I am trying to control a bluetooth amplifier board with an arduino. The amplifier board has five buttons (vol+, vol-, next, prev, play/pause). To control them with arduino, I am going to use an optocoupler (4N35).
I desoldered the buttons, soldered short wires to the respective pads. Now I have some problems that I don't understand, maybe you can help:
1) vol+ and vol- work when touching the wires, BUT when i separate them, if I keep holding the wires (even by the insulation) it keeps being pressed. stops when I let go.
2) other three buttons don't work when touching the wires, in fact the bluetooth module restarts when "play/pause" wires are connected for more than ~5secs. BUT they do work if I touch the pad directly with the other wire.
So now I'm confused, are the wires the problem? is it worth trying other wires? (these are from an HDMI cable)
I tried connecting the optocoupler and arduino on a breadboard, it behaves the same as when I'm touching the wires - volume buttons work, others don't, if play/pause is connected for 5-10seconds, the module restarts.
I am an absolute beginner in electronics, so any help is appreciated.
see attachments below. Thank you!
bluetooth amplifier board - http://www.ebay.com/itm/TDA7492P-AU...015219?hash=item1c730868b3:g:K7AAAOSwux5YS5~W
CSR8635 Bluetooth chip datasheet - http://electrothing.co.za/images/products/bluetooth-audio-module-8/CSR8635-datasheet.pdf
photo of the wires on the amp -