Enclosure not stated · 2 knobs
DOD 280 CompressorVerified
Based on the DOD 280 Compressor· 5 other boards clone it
- Category
- Compressor
- Controls
- Compression · Level
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Compressor, DOD
From the post
The DOD 280 was DOD's first compression pedal made in the late '70s through the '80s. A great sounding compressor, this fairly simple circuit uses an LDR and LED combination (in the form of a VTL5C2) to compress the signal. This one's laid out for on board right angle PCB pots, mounted from the solder side as per usual). I've added polarity protection and power filtering, as well as an input pull down resistor. You can use a VTL5C9 or CLM6000, or a good ol' 1M dark resistance LDR and an LED in heat shrink in place of the original VTL5C2.
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 18 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×3 | 22K | 22k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×2 | 220K | 220k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×4 | 47nF | 47n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | read from the layout by eye | |
| ICs 1 | ||||
| ×1 | LM358 | LM358 | read from the layout by eye | |
| Opto 1 | ||||
| ×1 | VTL5C2 | VTL5C2 | vactrol; read from the layout by eye | |
| Potentiometers 2 | ||||
| Compression | B500K | B500k | Potentiometer | labelled Comp on the board; read from the layout by eye |
| Level | A100K | A100k | Potentiometer | read from the layout by eye |
Other boards based on the DOD 280 Compressor
- DOD Compressor 280 Dirtbox Layouts
- Compressor 280 (TonePad) PCBWay: Glory to Ukraine
- Compressor 280 LDR (TonePad) PCBWay: Glory to Ukraine
- DOD 280 Compressor Tagboard Effects
- DOD 280 Compressor Tonepad · $8.00