ER-VCO-03 Rev 2 Assembly Sheet

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ER-VCO CTL-03-CARD SET-3D-720PX.png

Overview

  • Three card set
    • Front Panel
    • Controls card
    • CPU card

Controls Card

ER-VCO CTL-03-REV2 SIDE-3D.png

SYNTH-VCO-CTL-03 FRONT REAR REV2 CAD.png

Parts List

  • Toggle switches, SW2, SW4 mount on jacks/pots side
  • C1 cap near 2x8 female 2x8 socket is close
    • Need to make sure the side of the 2x8 comes from cutting down a header that it's trimmed tightly
      • Could install cap after the header
  • SW2, SW4 offset from card is adjustable with rear/front nuts
    • Set heights of switches using nuts on 3.5mm jacks
  • 1/8W resistors but 1/4W should work
  • Used SW1 with shaft extender, but taller pushbutton should work, perhaps 14mm
Find Qty Ref Des Part Number Find Qty Ref Des Part Number
1 1 R1 330 10 6 D3-D8 BAT41
2 2 R7, R9 220K 11 2 RV1, RV2 10K
3 2 R8, R10 330K 12 1 SW1 Switch, Pushbutton, 6mm (13mm shaft?)
4 2 R11, R12 1K 13 2 SW2, SW4 Switch, SPDT, 0.1" pin pitch, ON-OFF-ON (CONTROLS SIDE)
5 1 R13 22K 14 4 J1-J4 PJ-301BM
6 1 R14 33K 15 1 J5 HEADER, FEMALE, 2X8
7 1 C1 47uF 16 1 J6 HEADER, FEMALE, 1X3
8 3 C4, C5, C7 0.01uF 17 1 SW1 Shaft extender, white
9 2 C6, C8 0.1uF

CPU Board

ER-VCO DB-03 REV2 SIDE 3D.png

ER-VCO-DB-03 REV2 FRONT REAR CAD.png

Parts List

  • 1/8W resistors but 1/4W should work
Find Qty Ref Des Part Number Find Qty Ref Des Part Number
1 1 U2 SOCKET, IC, 8 PIN 9 2 U2 SOCKET, 1X7
2 1 R2 5.6K 10 1 J1 HEADER, STRT, 2x8 (REAR SIDE)
3 1 R3 2.7K 11 1 J2 HEADER, STRT, 1x3 (REAR SIDE)
4 2 R4, R5 220 12 1 J5 CONN, IDC, 2X8
5 1 R6 DNP 13 1 U1 MCP6232 5V Opamp
6 3 D1, D2, D3 BAT41 14 1 U2 XIAO RP2040 CPU
7 2 C2, C3 10nF
8 2 C9, C11 47uF

Assembly

  • Connect cards
  • May want to RTV the cards together
  • May want to RTV the RP2040 to the CPU card
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