Enclosure not stated · 3 knobs
SMD RAT
Based on the SMD RAT
- Category
- Distortion
- Controls
- Distortion · Tone · Volume
- Build
- Perfboard
- Layout
- Unverified · no build reported at Effects Layouts (blog) yet
- Tags
- Distortion, ProCo
From the post
There's no getting around it, through hole components have long been on the way out and being replaced by SMD. I've had several clients I do board design work for either going full SMD or at least a hybrid with SMD for resistors and a few other components, and TH for caps. This RAT layout goes the more hybrid route, giving you the option for TH or SMD caps (except for electrolytic caps). The opamp remains TH so the LM308 can still be used.
Build doc with scaled etch image and drill templates 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 34 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
- C3 30p: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| R1 | 1M | 1M | 0805 SMD; read from the layout by eye | |
| R2 | 1M | 1M | 0805 SMD; read from the layout by eye | |
| R3 | 1K | 1k | 0805 SMD; read from the layout by eye | |
| R4 | 47Ω | 47 | 0805 SMD; read from the layout by eye | |
| R5 | 560Ω | 560 | 0805 SMD; read from the layout by eye | |
| R6 | 1K | 1k | 0805 SMD; read from the layout by eye | |
| R7 | 1.5K | 1.5k | 0805 SMD; read from the layout by eye | |
| R8 | 1M | 1M | 0805 SMD; read from the layout by eye | |
| R9 | 10K | 10k | 0805 SMD; read from the layout by eye | |
| R10 | 47Ω | 47 | 0805 SMD; read from the layout by eye | |
| R11 | 100K | 100k | 0805 SMD; read from the layout by eye | |
| R12 | 100K | 100k | 0805 SMD; read from the layout by eye | |
| CLR | 4.7K | 4.7k | LED resistor, 0805 SMD; read from the layout by eye | |
| Capacitors 13 | ||||
| C1 | 22n | 22n | 0805 SMD or through-hole; read from the layout by eye | |
| C2 | 1n | 1n | 0805 SMD or through-hole; read from the layout by eye | |
| C3 | 30p | 30p | 0805 SMD or through-hole; read from the layout by eye | |
| C4 | 100p | 100p | 0805 SMD or through-hole; read from the layout by eye | |
| C5 | 2.2u | 2.2u | electrolytic; read from the layout by eye | |
| C6 | 4.7u | 4.7u | electrolytic; read from the layout by eye | |
| C7 | 4.7u | 4.7u | electrolytic; read from the layout by eye | |
| C8 | 3.3n | 3.3n | 0805 SMD or through-hole; read from the layout by eye | |
| C9 | 22n | 22n | 0805 SMD or through-hole; read from the layout by eye | |
| C10 | 1u | 1u | electrolytic; read from the layout by eye | |
| C11 | 100u | 100u | electrolytic; read from the layout by eye | |
| C12 | 10n | 10n | 0805 SMD or through-hole; read from the layout by eye | |
| C13 | 10u | 10u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| D3 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 1 | ||||
| Q1 | MMBF5458 | MMBF5458 | JFET, SOT23 SMD; alternatives include MMBFJ201 or other SOT23 JFET; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | LM308 | LM308 | alternatives OP07, LM301; TL071 or LM741 can be used, but remove C3; read from the layout by eye | |
| Potentiometers 3 | ||||
| Distortion | A100K | A100k | Potentiometer | 16mm PCB mount; read from the layout by eye |
| Tone | A100K | A100k | Potentiometer | 16mm PCB mount; read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | 16mm PCB mount; read from the layout by eye |