Enclosure not stated · 5 knobs
DeadAstronaut TremshifterVerified
Based on the Dead Astronaut Tremshifter· the maker's own board is Tremshifter by Dead Astronaut FX
From the post
Merry Christmas Eve-Eve, everybody! Hope everyone has a safe and happy holiday. Here's an awesome tremolo circuit designed by DIYSB member DeadAstronaut. Cody asked me if I could do an etch-able layout since DeadAstronaut has sold out of PCBs for the effect. Check out the original thread on DIYSB for the schematic and more info.
Edit 3/2/16: Added missing resistor in the filter LFO and corrected traces in trem LFO.
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 37 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
- Volume pot B22k: printed clearly, unusual value
- LDR1, LDR2: the source gives no part number, only '2k-24k'; GL5516 and GL5528 are suggestions whose lit resistance falls in that range, not parts the designer named
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×4 | 100K | 100k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×8 | 220K | 220k | read from the layout by eye | |
| ×4 | 1K | 1k | read from the layout by eye | |
| ×2 | 6.8K | 6.8k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 13 | ||||
| ×1 | 22pF | 22p | read from the layout by eye | |
| ×1 | 330pF | 330p | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; starred: increase to 22-47uF for slower filter sweep; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| ICs 1 | ||||
| ×3 | 1458 | 1458 | read from the layout by eye | |
| Opto 2 | ||||
| LDR1 | GL5516 or GL5528 | GL5516 / GL5528 | suggested part: the parts list names none, only an on (lit) resistance between 2k and 24k (printed '2k-24k'); the GL5516 is 5-10k and the GL5528 10-20k at 10 lux; printed 'LDR 2k-24k' on the drawing; read from the layout by eye | |
| LDR2 | GL5516 or GL5528 | GL5516 / GL5528 | suggested part: the parts list names none, only an on (lit) resistance between 2k and 24k (printed '2k-24k'); the GL5516 is 5-10k and the GL5528 10-20k at 10 lux; printed 'LDR 2k-24k' on the drawing; read from the layout by eye | |
| Potentiometers 5 | ||||
| Tremolo Speed | A1M | A1M | Potentiometer | read from the layout by eye |
| Tremolo Depth | B1K | B1k | Potentiometer | read from the layout by eye |
| Filter Depth | B100K | B100k | Potentiometer | read from the layout by eye |
| Filter Speed | A1M | A1M | Potentiometer | read from the layout by eye |
| Volume | B22K | B22k | Potentiometer | read from the layout by eye |
| Switches 3 | ||||
| Filter | SPST | SPST | read from the layout by eye | |
| Filter Cap | SPDT on/off/on | SPDT ON/OFF/ON | read from the layout by eye | |
| Square/Triangle | SPDT | SPDT | read from the layout by eye | |
| LEDs 3 | ||||
| D1 | 5mm LED | 5MM LED | on board; read from the layout by eye | |
| D2 | 5mm LED | 5MM LED | on board; read from the layout by eye | |
| ×2 | 3mm LED | 3MM LED | off-board Filter LED and Trem LED; read from the layout by eye | |
Other boards based on the Dead Astronaut Tremshifter
- Tremshifter the original · Dead Astronaut FX · £15.00