Enclosure not stated · 2 knobs
Merlin Blencowe's One Chip ChorusVerified
Based on the Merlin Blencowe's One Chip Chorus
- Category
- Vibrato / Chorus
- Build
- Vero· 18×14· 18 cuts, 4 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Chorus, Vibrato
From the post
Another one of these nice little PT2399 projects to try out. This was a from a schematic posted by Merlin Blencowe and it seems to give a nice range of vibrato and chorus sounds for such a simple design, using just the PT2399 IC and nothing else driving it.
Clip made by Merlin (he posted that any noise was due to his recording setup and not the effect).
Yes the chips can be temperamental, but the results can be great for some of these effects. Just don't forget to buy 10 x PT2399's and keep trying them until you find one that works :o)
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 21 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 1 value the reader of this layout was not sure of
- 91K lower right beside the Depth 1 / Output wires: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 820K | 820k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 91K | 91k | read from the layout by eye | |
| Capacitors 8 | ||||
| ×5 | 100n | 100n | read from the layout by eye | |
| ×2 | 47n | 47n | read from the layout by eye | |
| ×2 | 10n | 10n | read from the layout by eye | |
| ×1 | 33p | 33p | read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×2 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×2 | 4u7 | 4.7u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | BC337 | BC337 | or similar NPN; read from the layout by eye | |
| ICs 2 | ||||
| IC1 | PT2399 | PT2399 | read from the layout by eye | |
| ×1 | 78L05 | 78L05 | regulator; read from the layout by eye | |
| Potentiometers 2 | ||||
| Depth | B10K | B10k | Potentiometer | read from the layout by eye |
| Rate | B100K | B100k | Potentiometer | read from the layout by eye |
| LEDs 1 | ||||
| D2 | 3mm Red LED | 3MM RED LED | on the board; read from the layout by eye | |