Sensor boards going into a little mass production...

After messing up with the TWI(I2C) protocoll it was time for me to midify the entire keyboard. Oh you can’t imagine how impatient I was about having my entire keyboard to play. So first I build a very sloppy UV exposure device out of UV-LEDs. you can see the result here:

 

and here you can see it working on the sensor PCBs:

 

The finished PCBs looked like that:

Now it was soldering time. As you can imagine soldering 11 of those boards (okay it were only ten since there already was one prototype) is a very lasting exercise so when i got finished 4 of them I took some photos:

not letting the beauty of my work distract me I continued soldering and soldering and…. finally:

  

What happened then was a little disappointing: I had to find out that there went something wrong with the PCBs. I designed the power supply traces to narrow for the 88 IR LEDs sucking about 1.6 A, which caused a voltage loss in the sensor chain such that I had to add a further supply lines in the middle of the chain and some wires on each PCS to support the traces.

Finally I made the sensor chain work and it was time to mount it:

 (I excuse for the bad image quality)

 In order to make the sensor bar work with the keys a reflection tag had to be mounted to each key:

  This is my working table where I put the reflection strips at the keys. I’m sure you can estimate its WAF considering that its placed in my living room

So now it was time to play the piano exploring the next _issue_ to be solved… while my dog just tried to sleep:

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