First post - go easy!
I am building a Floor Piano using the innards from a Music Keyboard. I have reverse engineered the Keyboard PCB (attached) the switches are the Keys on the Keyboard. the circuit is 3 Volts DC.
When the switch is closed (key pressed) I need to light the Key up. I plan to have a 12V DC LED circuit to do this.
My question is - how to trigger the LEDs? Independent circuit or incorporate it into the attached Schematic? Relays?
I will have a further question based on the answer! While the switch is obviously On or Off, I'd like the LED lights to dim slowly after turning off (1 second delay). If I'm remembering correctly from my Apprenticeship - I'd need a Capacitor somewhere.
Any advice would be gratefully received.
Kevin
I am building a Floor Piano using the innards from a Music Keyboard. I have reverse engineered the Keyboard PCB (attached) the switches are the Keys on the Keyboard. the circuit is 3 Volts DC.
When the switch is closed (key pressed) I need to light the Key up. I plan to have a 12V DC LED circuit to do this.
My question is - how to trigger the LEDs? Independent circuit or incorporate it into the attached Schematic? Relays?
I will have a further question based on the answer! While the switch is obviously On or Off, I'd like the LED lights to dim slowly after turning off (1 second delay). If I'm remembering correctly from my Apprenticeship - I'd need a Capacitor somewhere.
Any advice would be gratefully received.
Kevin
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