pocket piano

Other Hardware General Electronics
1

hello
i have just two questions about the pocket piano
im having just a little bit of trouble with the schematic
i don't know where to connect the two capacitors located near the multiplexer chips (vcc and grd)
(are they connected to pins on the capacitors or to the arduino)
there is also one located near the mcp 4921 chip

and secondly
where the sting of three potentiometers there is a vcc out and a pot 1
(i am wondering if that pot 1 is a typo and is suppose to be a GRD)

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Please help!!!
thanks in advance for your time
chris

2

The capacitors are connected across the + and - as close to the chip as you can. I see that C10 is out there in la-la land, and should be for the bottom multiplexer.

The pot_1 designation appears to be a typo and should go be labeled "ground"

3

not sure what you mean by the bottom multiplexer?
and pin 10
sorry
im a newb :frowning:

4

not sure what you mean by the bottom multiplexer?

In your schematic - there are 3 multiplexers. The bottom one :slight_smile:

and pin 10

What about pin 10?

5

do all the pin 10s connect together and go to mux b whick is digital pin 6 on the arduino
but i could be wrong