125B · 4 knobs
AndromedaNatural Overdrive
Based on the Nobels ODR-1· 4 other boards clone it
- Category
- Overdrive
- Controls
- Gain · Spectrum · Bass · Level
- Difficulty
- Intermediate
- Price
- $12.50in stock
From the vendor
A unique overdrive pedal whose complex drive tone earns it a spot on the pedalboards of many Nashville studio musicians.
Project description
The Andromeda Natural Overdrive is a recreation of the Nobels ODR-1, a German pedal from the early 1990s that has come to be known as a “secret weapon” among Nashville studio musicians.
The overwhelming complaint of the ODR-1 is that it has way too much bass with no way to dial it out. To that end, the Andromeda incorporates a variable bass control inspired by the Timmy and Zendrive. The stock tones are still there with the knob all the way up, but now you have the option to dial it back.
Looking at the schematic, you can see a stark difference with Japanese-designed pedals (i.e. most Ibanez or Boss circuits). This is German engineering at its finest—tons of odd-value resistors and capacitors forming very precise filters and signal shaping. This is not a particularly simple build, but it’s very rewarding and well worth the effort.
Note: The PCB-only version of this project uses a type of capacitor that has been temporarily discontinued by WIMA. Please see our news article about the issue and the substitution spreadsheet for project-specific recommendations. We are stocking a limited supply in the mean time. The build document has not yet been updated to reflect this. It does not impact the kits.
Schematic
The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 79 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 30 | ||||
| R1 | 33k | 33k | Metal film resistor, 1/4W | |
| R2 | 1M | 1M | Metal film resistor, 1/4W | |
| R3 | 3k3 | 3.3k | Metal film resistor, 1/4W | |
| R4 | 2k7 | 2.7k | Metal film resistor, 1/4W | |
| R5 | 10k | 10k | Metal film resistor, 1/4W | |
| R6 | 1k8 | 1.8k | Metal film resistor, 1/4W | |
| R7 | 820R | 820 | Metal film resistor, 1/4W | |
| R8 | 1k5 | 1.5k | Metal film resistor, 1/4W | |
| R9 | 12K | 12k | Metal film resistor, 1/4W | |
| R10 | 39K | 39k | Metal film resistor, 1/4W | |
| R11 | 10K | 10k | Metal film resistor, 1/4W | |
| R12 | 12k | 12k | Metal film resistor, 1/4W | |
| R13 | 5k1 | 5.1k | Metal film resistor, 1/4W | |
| R14 | 2k2 | 2.2k | Metal film resistor, 1/4W | |
| R15 | 150K | 150k | Metal film resistor, 1/4W | |
| R16 | 3k3 | 3.3k | Metal film resistor, 1/4W | |
| R17 | 1k2 | 1.2k | Metal film resistor, 1/4W | |
| R18 | 43K | 43k | Metal film resistor, 1/4W | |
| R19 | 10K | 10k | Metal film resistor, 1/4W | |
| R20 | 20K | 20k | Metal film resistor, 1/4W | |
| R21 | 4k7 | 4.7k | Metal film resistor, 1/4W | |
| R22 | 22K | 22k | Metal film resistor, 1/4W | |
| R23 | 5k1 | 5.1k | Metal film resistor, 1/4W | |
| R24 | 1k2 | 1.2k | Metal film resistor, 1/4W | |
| R25 | 150K | 150k | Metal film resistor, 1/4W | |
| R26 | 150K | 150k | Metal film resistor, 1/4W | |
| R27 | 15K | 15k | Metal film resistor, 1/4W | |
| R28 | 15K | 15k | Metal film resistor, 1/4W | |
| R29 | 47R | 47 | Metal film resistor, 1/4W | |
| LEDR | 10k | 10k | Metal film resistor, 1/4W L | ED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 25 | ||||
| C1 | 68n | 68n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C3 | 120pF | 120p | MLCC capacitor, NP0/C0G | |
| C4 | 82n | 82n | Film capacitor, 7.2 x 2.5mm | |
| C5 | 2.2uF | 2.2u | Film capacitor, 7.2 x 5mm | |
| C6 | 2.2uF | 2.2u | Film capacitor, 7.2 x 5mm | |
| C7 | 2n7 | 2.7n | Film capacitor, 7.2 x 2.5mm | |
| C8 | 82n | 82n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C10 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 27n | 27n | Film capacitor, 7.2 x 2.5mm | |
| C12 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C13 | 8n2 | 8.2n | Film capacitor, 7.2 x 2.5mm | |
| C14 | 560pF | 560p | MLCC capacitor, NP0/C0G | |
| C15 | 8n2 | 8.2n | Film capacitor, 7.2 x 2.5mm | |
| C16 | 4n7 | 4.7n | Film capacitor, 7.2 x 2.5mm | |
| C17 | 82n | 82n | Film capacitor, 7.2 x 2.5mm | |
| C18 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C19 | 2.2uF | 2.2u | Film capacitor, 7.2 x 5mm | |
| C20 | 470n | 470n | Film capacitor, 7.2 x 3.5mm | |
| C21 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C22 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C23 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter capacitor. |
| C24 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter capacitor. |
| C25 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. |
| Diodes 7 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D3 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D4 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D5 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D6 | 1N914 | 1N914 | Fast-switching diode, DO-35 | Optional. Bridge the jumper pads between D6 and D7 for the stock ODR-1 circuit. |
| D7 | 1N914 | 1N914 | Fast-switching diode, DO-35 | Optional. Bridge the jumper pads between D6 and D7 for the stock ODR-1 circuit. |
| Transistors 2 | ||||
| Q1 | 2N5457 | 2N5457 | JFET, N-channel, TO-92 | Commonly-available substitute. Original uses BC264D. |
| Q2 | 2N5088 | 2N5088 | BJT transistor, NPN, TO-92 | Commonly-available substitute. Original uses 2SC2362G. |
| ICs 2 | ||||
| IC1 | JRC4558D | JRC4558D | Operational amplifier, DIP8 | |
| IC2 | JRC4558D | JRC4558D | Operational amplifier, DIP8 | |
| Potentiometers 4 | ||||
| GAIN | 250kA | A250k | 16mm right-angle PCB mount pot | |
| LEVEL | 50kA | A50k | 16mm right-angle PCB mount pot | |
| SPECT | 25kB | B25k | 16mm right-angle PCB mount pot | |
| BASS | 50kC | C50k | 16mm right-angle PCB mount pot | Modification. Turn it all the way up for the stock ODR-1 circuit. |
| Switches 1 | ||||
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | Available from Aion FX. |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 5 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IC2-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IN | 1/4" stereo | 1/4" STEREO | 1/4" phone jack, closed frame | Switchcraft 112BX or equivalent. |
| OUT | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| DC | 2.1mm | 2.1MM | DC jack, 2.1mm panel mount | Lumberg NEB/J 21 C or equivalent. |
| Hardware 2 | ||||
| BATT | Battery snap | BATTERY SNAP | 9V battery snap | Optional. Use the soft plastic type—the hard-shell type will not fit. |
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |
Other boards based on the Nobels ODR-1
- Andromeda (Legacy) Aion FX · 1590B
- Nobels ODR-1 Experimentalists Anonymous
- Laureate Jr Madbean · 1590B · $10.00
- Nobleman Overdrive PedalPCB · 125B · $12.00