Akashic Guitar effects PCB lookup
IIIINPUTOUT

1590B · 3 knobs

Fuzz Dog· ImpossMini

Impossibility Drive Mini

Category
Fuzz
Controls
Iii · Input · Out
Difficulty
Medium
Price
£43.20
Tags
fuzz

From the vendor

When you're tired of tone and all else fails, why not totally shiz things up with the Impossibility Drive?

More sound mangler than tone machine, this crazy box of fuzz takes your sound places you may not even know you wanted it to go.

It's very difficult to describe. There are a couple of easy to grasp controls - IN and OUT, which will adjust your gain just like your guitar volume, and your output volume. After that it's anyone's guess, including the original designer. That'll be why the controls are simply numbered rather than named. The other four pots and two switches (more on that below) are totally interactive with each other. Basically the learning curve on this is steep, but the fun and journey of discovery will last for weeks. One of those four is our own addition - a voltage starve control which, frankly, was a massive missed opportunity on the original pedal.

The range of tones available is typical of the circuit designer's oeuvre, going from barely broken up OD to all-out splattery fizz, with all kinds of crazy hoohaa and oscillation freakery in between.

This kit is based on the only schematic available, and is quite an eyeful. We can only assume it's correct as not a lot makes sense.

So what's this for? Getting creative. Stick it in front of another fuzz and let the fun commence. Do NOT expect creamy Gimour tone, and don't come crying about your sanity and lack of sleep once you start messing with it.

The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. Spacing is tight at 17.5mm, so stick with smaller knobs such as 1900H.

If you want the PCB without parts there's a link for that at the bottom of the page.

Partial kit: PCB, all board-mounted components, pots.

Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.

1590B Enclosure (pre-drilled) is available as an option with full kits, and will not take a battery. Knobs are not included.

Difficulty: Improbability

Difficulty: Medium

PCB size: 50 x 54mm

Knobs required: 6

Enclosure: 1590B

Direct Connect compatible (4-way)

Download the INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 41 rows

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RefValueNormalizedTypeNotes
Resistors 16
R13M33.3M
R23M33.3M
R33M33.3M
R43M33.3M
R510M10M
R63M33.3M
R7100K100k
R83M33.3M
R93M33.3M
R103M33.3M
R111M1M
R123M33.3M
R132M22.2M
R14220K220k
R153M33.3M
R1710K10k
Capacitors 14
C122n22n
C210n10n
C3100n100n
C4100n100n
C5100n100n
C633n33n
C710n10n
C810n10n
C9100n100n
C1010n10n
C1110n10n
C1247n47n
C1333n33n
C1410n10n
Diodes 1
D11N58171N5817
Transistors 6
Q12N3391A2N3391A
Q22N2907A2N2907A
Q32N2907A2N2907A
Q42N22222N2222
Q52N2907A2N2907A
Q6MPSA18MPSA18
Potentiometers 3
III500KBB500k
INPUT500KBB500k
OUT100KAA100k
Other 1
II1MB1MB