125B · 1 knob
MXR Micro Chorus
Based on the MXR Micro Chorus
- Category
- Vibrato / Chorus
- Controls
- Rate
- Build
- Perfboard
- Layout
- Unverified · no build reported at Effects Layouts (blog) yet
- Tags
- Chorus, MXR
From the post
The originals used a now nearly unobtainable SAD512D chip, but the wizards on FSB converted it to work with an MN3007. Now that those are also hard to get a hold of, I've laid this out for an MN 3207–which is almost the same as the 3007, just with a slightly different pinout for power and ground. But if you want to use a 3007, I've included a daughter board that will let you use it (it will also work to use a 3207 in place of a 3007). This will best fit in a 125B and the schematic can be found here.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 39 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- 240K, vertical below the 56nF near the bottom right (col 16): printed clearly, unusual value
- 7.5K, vertical right of the 100nF in the middle (col 9): printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 17 | ||||
| ×2 | 120K | 120k | read from the layout by eye | |
| ×6 | 1M | 1M | read from the layout by eye | |
| ×1 | 200K | 200k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×9 | 47K | 47k | read from the layout by eye | |
| ×5 | 20K | 20k | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 7.5K | 7.5k | read from the layout by eye | |
| ×2 | 270K | 270k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×2 | 27K | 27k | read from the layout by eye | |
| ×1 | 240K | 240k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| Capacitors 11 | ||||
| ×2 | 330nF | 330n | read from the layout by eye | |
| ×2 | 15pF | 15p | read from the layout by eye | |
| ×2 | 220pF | 220p | read from the layout by eye | |
| ×5 | 1nF | 1n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×2 | 56nF | 56n | read from the layout by eye | |
| ×1 | 330pF | 330p | read from the layout by eye | |
| ×1 | 33pF | 33p | read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×1 | 1N4001 | 1N4001 | printed 4001; read from the layout by eye | |
| ×1 | 1N4148 | 1N4148 | printed 4148; read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q2 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q3 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q4 | 2N5088 | 2N5088 | read from the layout by eye | |
| ICs 3 | ||||
| ×1 | MN3207 | MN3207 | read from the layout by eye | |
| ×1 | TL061 | TL061 | read from the layout by eye | |
| ×1 | TL062 | TL062 | read from the layout by eye | |
| Potentiometers 1 | ||||
| Rate | C500K | C500k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 220K | 220k | read from the layout by eye | |