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1
Development / Interrupt voltage level
« on: June 05, 2016, 01:09:41 AM »
hello
I bought the parts and managed to create the sensor. The first time I did it, i used jumper cables and an arduino board and was able to see midi notes in the serial monitor.
A few weeks later, I decided to cleanup the breadboard and switch to using wires and things stopped working

1- the LED is still flashing like it used to
2- now the maximum voltage at pin 3 of the 555 timer is at 2V. I didn't measure the max voltage before the cleanup :(. Is the voltage to low to trigger a rising edge? Is it supposed to be at 3.3V with 5V Vcc?

I used a simple Arduino sketch to verify that my connections were working, and indeed I can read the voltage from the timer.
I used a multimeter and everything looks good. even measured the capacitance of each cap and the resistance of the 100k. everything is in order.
I can attach a picture of my circuit if it helps

thanks!


 

2
Questions / Github?
« on: May 06, 2016, 01:19:05 AM »
Hi Sam
Have you contemplated hosting the source code on github? Do you have any reasons for not doing so? It can perhaps encourage a discussion about the software and allow folks to make their own forks.

3
Kit Instructions / Re: MIDIsprout Kit Build Discussion
« on: April 16, 2016, 10:25:22 AM »
cool! that makes sense about the midi merger and the interrupt vs polling.
I believe multiple interrupts might be  hard to manage as one interrupt might interrupt the other and data might be dropped from one of the sensors, right?
Polling makes sense, but what would be an acceptable state change? Is that something I would declare in code? But yeah, more inputs would require faster chip.
Also a shield would be pretty neat! as well as a wifi sprout!  Thanks again for your valuable feedback :)

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