*Metonome with delay & Interupts for buttons Created by Ryan Aebi May 2018 Design Structure -1 led that will flash with BPM (Beat Per Minute) -4 buttons to change BPM, +1, +10, -1, -10 -1 display to show BPM rate -added a buzzer for sound 7/19/18 Button Design/wiring -all 4 buttons have one pin going to ground. Additionally I may try to have it to where I can both have the Metronome sketch and a whack a mole sketch uploaded then selected by a separate switch. Also using a different on/off switch and allowing battery access from the outside. The next steps in vamping this up for me is to redo the box appearance adding a switch that can turn on/off the music. Causes recalculation of millisecond of each beat for blink function.Additionally causes BPM to be written to display via ITOA library.Button push triggers BPM functions according to button functions either change BPM to +1, +10, -1 or -10.Interrupt triggers evaluate function to evaluate which button was pressed. blink off time is calculated by Pit falls of this calculation are that at high speeds (~1200 BPM) an error will occur, this can be avoided by reducing blink on time.THIS IS CRITICAL!! Also the pins are configured as high using the internal pull up resistors.
Diode allows current to follow from interrupt pin#2 to ground and the one button pressed but not from others. on opposite side of ground the pins go to:ġ) Pin# corresponding to +1, +10, -1, -10 as assigned in setup.Ģ) Then through a diode (I used an LED), then to Pin#2 aka interrupt.all 4 buttons have one pin going to ground.Here is an in depth overview of the setup. Video shows me going over the setup prior to installing in final box setup.
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