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BMC038. Panel Keyboard.
Last updated 11-16-2015
If you have any questions, or need help trouble shooting, please e-mail
Michael@Bartonmusicalcircuits.com
I Overview/Features
II Schematic
III Construction
A.Parts List
B.The Board
C.Calibration
D.Photos/Final Thoughts
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Summary of Contents for Barton Motors BMC038
- Page 1 BMC038. Panel Keyboard. Last updated 11-16-2015 If you have any questions, or need help trouble shooting, please e-mail Michael@Bartonmusicalcircuits.com I Overview/Features II Schematic III Construction A.Parts List B.The Board C.Calibration D.Photos/Final Thoughts...
- Page 2 I. Overview/Features This module is a keyboard, only mounted with your other modules in your modular synthesizer rather than in a separate housing. It does this by using a small number of push-buttosn instead of traditional keys. This can be used like a traditional keyboard to play melodies, or it can be used a precision voltage reference for voltage controlled parameters in other modules.
- Page 4 III. Construction A.Parts List Semiconductors Name Quantity Notes 16F689 Provided with PCB MCP4921 DIP packaging TL074 DIP packaging 7805 TO-220 packaging Red LED 3mm size Green LED 3mm size 1N4148 Or other small switching diode Resistors Name/Value Quantity Notes 10 ohm 1/4W metal film through hole 1/4W metal film through hole 8.2K...
- Page 5 B. The PCB Below are images of the two sides of the PCB. As you can see all of the parts which mount with the panel are on one side, and everything else is on the other side. The jacks are not mounted to the PCB, this allows the PCB to be used in different formats of synthesizers without requiring different PCBs for different jacks.
- Page 6 D.Photos/Final Thoughts Here are a couple of photos of a completed unit to give an idea of how it all comes together. The jacks are close enough to the wirepads that I just used the clipped off leads from the resistors, this saves wire and saves time stripping wires.
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