VC ADSR 121 Build Guide
Assembly Instructions
The VC ADSR 121 module has no particular build requirements not already covered in the ‘General Build Info' page except for:
The LED switch will sit better on the PCB if the small spigot on the rectangular standoff is snipped off. Make sure the switch is soldered onto the PCB the correct way around. The green marking on the side of the switch body is the cathode.
The back panel has a small rebate around the LED switch hole for the switch body to sit in.
Calibration
This module requires no calibration or tuning.
PCB Parts List
| Part Number | Quantity | Value | Name | RefDes |
| 7213-110 | 2 | 100u | 100uF 25V Electrolytic | C1, C6 |
| 7212-768 | 10 | 100n | 100n MLCC Capacitor | C2, C3, C4, C5, C7, C8, C9, C10, C17, C20 |
| 7212-762 | 3 | 3n3 | 3n3 MLCC Capacitor | C11, C14, C15 |
| 7212-745 | 2 | 10n | 10n MLCC Capacitor | C12, C16 |
| 7212-766 | 1 | 33n | 33n MLCC Capacitor | C13 |
| 7212-774 | 2 | 1n | 1n MLCC Capacitor | C18, C19 |
| 7212-486 | 5 | 1N914 | D1, D2, D3, D4, D5 | |
| 1208-010 | 1 | Flex Strip 10way | J1 | |
| 7212-301 | 1 | Eurorack | Eurorack Power | J2 |
| Pot 100k Lin PCB Angle* | P1-Attack, P2-Decay, P3-Sustain, P4-Release, P5-Attack-WF, P6-Decay-WF, P7-Release-WF | |||
| 7163-099 | 25 | 100k | 100k 0.25W 1% Metal Film Resistor | R1, R6, R7, R8, R9, R10, R11, R12, R14, R18, R24, R25, R26, R27, R29, R30, R31, R38, R39, R43, R47, R50, R52, R53, R55 |
| 7163-075 | 5 | 10k | 10k 0.25W 1% Metal Film Resistor | R2, R36, R44, R48, R58 |
| 7163-081 | 3 | 18k | 18k 0.25W 1% Metal Film Resistor | R3, R16, R32 |
| 7163-089 | 3 | 39k | 39k 0.25W 1% Metal Film Resistor | R4, R13, R33 |
| 7163-038 | 3 | 300R | 300R 0.25W 1% Metal Film Resistor | R5, R19, R34 |
| 7163-101 | 4 | 120k | 120k 0.25W 1% Metal Film Resistor | R15, R17, R20, R23 |
| 7163-092 | 1 | 51k | 51k 0.25W 1% Metal Film Resistor | R21 |
| 7163-086 | 1 | 30k | 30k 0.25W 1% Metal Film Resistor | R22 |
| 7163-084 | 1 | 24k | 24k 0.25W 1% Metal Film Resistor | R28 |
| 7163-043 | 1 | 470R | 470R 0.25W 1% Metal Film Resistor | R35 |
| 7163-082 | 5 | 20k | 20k 0.25W 1% Metal Film Resistor | R37, R41, R49, R54, R57 |
| 7163-051 | 2 | 1k | 1k 0.25W 1% Metal Film Resistor | R40, R42 |
| 7163-122 | 2 | 1M | 1M 0.25W 1% Metal Film Resistor | R45, R51 |
| 7163-053 | 1 | 1k2 | 1k2 0.25W 1% Metal Film Resistor | R46 |
| 7163-062 | 1 | 3k | 3k 0.25W 1% Metal Film Resistor | R56 |
| 7212-250 | 1 | SPDT | S1 | |
| 7212-263 | 1 | Green LED PB | S2 | |
| 7212-544 | 3 | TL074 | U1, U3, U5 | |
| 7212-588 | 1 | AS3310 | U2 | |
| 7212-509 | 1 | 4013B | U4 |
*See below for MOTM or MU Potentiometers
Module Parts List
| Description | Reference | MOTM Qty | MU Qty |
| Pot Sticky Pads | 7210-188 | 7 | 1 |
| 10mm M4 Spacers | 7210-186 | 4 | 1 |
| M4 x 14 Cap Head Screws | 7210-187 | 4 | 1 |
| Toggle Switch Dress Nut | 7210-196 | 1 | 1 |
| M3 x 8mm Stainless Panel Screws | 7210-189 | 4 | |
| 14-Pin IC Socket | 7212-332 | 4 | 1 |
| 16-Pin IC Socket | 7212-333 | 1 | 1 |
| Power Lead | 7216-164 | 1 | |
| M²Synth MU / MOTM Voltage Regulator / Interface | 7216-170 | 1 | |
| MOTM Front Panel | 7216-521 | 1 | |
| MOTM Back Panel | 7216-821 | 1 | |
| MU Front & Back Panel | 7219-521 | 1 | |
| Main PCB | 7216-021 | 1 | |
| Jack Socket PCB | 7215-733 | 1 | |
| Jack Sockets | 7212-220 | 9 | |
| B100k Pots Long Shaft | 7300-820 | 7 | |
| B100k Pots Short Shaft | 7300-821 | 7 | |
| KM20B Knobs | 7212-170 | 7 | |
| MU Knobs | 7212-169 | 7 | |
| Circuit Schematic | S-7216-021-d | 1 |
PCB Layout
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