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III. Construction

A.Parts List

Semiconductors

Name

Quantity Notes

16F689

1

Provided with PCB

MCP4921

1

DIP packaging

TL074

1

DIP packaging

7805

1

TO-220 packaging

Red LED

4

3mm size

Green LED

2

3mm size

1N4148

12

Or other small switching diode

Resistors

Name/Value

Quantity Notes

10 ohm

2

1/4W metal film through hole

1K

6

1/4W metal film through hole

8.2K

1

1/4W metal film through hole

10K

1

1/4W metal film through hole

100K

6

1/4W metal film through hole

B100K Potentiometer

2

9mm Right angle PCB mount.  

Like this.

5K Cermet Potentiometer

1

3296W packaging

Capacitors

Name/Value

Quantity Notes

.01uf

6

Cheap ceramic disc

10uf

2

2.5mm lead spacing, 5mm width.

Other

Name/Value

Quantity Notes

Power connecter

1

Eurorack or MOTM

Push-button. 

12

Normally open, panel mount.  

Like this.

Knobs

2

Jacks

3

8 pin DIP socket

1

14 pin DIP socket

1

20 pin DIP socket

1

Содержание BMC038

Страница 1: ...ated 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 ...

Страница 2: ...d LEDs and the anodes of the green LEDs so this allows it to control which set of LEDs are active by either being a current sink for the reds or source for the greens Pin 13 controls the anode of the first red LED and the cathode of the first green and Pin 3 does this for the second set This allows us to control 4 LEDs with only 3 pins To the right of these we see the switch matrix Pins 14 through...

Страница 3: ......

Страница 4: ...4W metal film through hole 8 2K 1 1 4W metal film through hole 10K 1 1 4W metal film through hole 100K 6 1 4W metal film through hole B100K Potentiometer 2 9mm Right angle PCB mount Like this 5K Cermet Potentiometer 1 3296W packaging Capacitors Name Value Quantity Notes 01uf 6 Cheap ceramic disc 10uf 2 2 5mm lead spacing 5mm width Other Name Value Quantity Notes Power connecter 1 Eurorack or MOTM ...

Страница 5: ...it to the panel This allows for more give to the parts making it easier to mount and also puts less stress on the PCB during the mounting process After everything is securely fastened resolder these connections then solder in the rest of the connections C Calibration 1 Set up a volt meter with the black lead to ground and the red lead to the CV output jack 2 Turn the octave knob so that only LED R...

Страница 6: ...t I just used the clipped off leads from the resistors this saves wire and saves time stripping wires I used bulk two row header clipped off instead of a shrouded header for my power connecter Here s a side view of the completed unit I did not use the washers that come with the pushbuttons if you decide to use them you may need to add washers for the pots as well ...

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