Delay / Echo · One-off prototype
The Cereal Killer
A lo-fi PT2399 delay — warm, gritty echoes that smear into gorgeous grain at long times and tip into runaway self-oscillation when you push the repeats. Built on the PedalPCB Cataclysm circuit and wrapped in a tarot-card skull-in-a-cereal-bowl.
- TypeDelay / echo (PT2399-based)
- ControlsTime, Repeats, Mix, Tone
- CircuitPedalPCB Cataclysm
- Power9V DC, center-negative
- StatusAvailable — one of a kind
⚠ Fine print from the void tap to expand / collapse
Not guaranteed new, not guaranteed to be any specific “clone,” and not even guaranteed to be from this universe — it might be cursed. What it definitely is: hand-built, one-of-a-kind, and straight off my bench. It's worn out its welcome here and it's time it found a new home — imperfections included.
Hand-built and one of a kind — and I stand behind it. Stops working within 30 days → full refund or free repair (I pay shipping back to me); free repairs anytime after that. Full returns & repairs terms »
What it does
The Cereal Killer is a delay built around the PT2399 — the beloved lo-fi echo chip. Short settings give you tight slapback and rockabilly bounce; open up the time and the repeats get darker, grainier, and more characterful as the chip degrades the signal in the best way.
Crank the Repeats and it stops being polite: echoes pile on top of echoes until the whole thing tips into self-oscillation — swelling, screaming, runaway noise you can ride with the Time knob for sci-fi dive-bombs and cereal-bowl chaos. The Tone control tames or brightens the tails, and Mix blends it from a subtle doubling to wall-of-echo.
Demo
Demo video coming soon.
Controls
- Time
- Delay time — from tight slapback up to long, grainy, spacey repeats.
- Repeats
- Feedback — how many echoes, from a single slap up into infinite, self-oscillating runaway.
- Mix
- Blend of dry signal against the delayed repeats — subtle doubling to full wall-of-echo.
- Tone
- Rolls the top end off the repeats for dark, analog-ish tails, or opens them up brighter.
Under the hood
| Circuit | PedalPCB Cataclysm — a PT2399 delay |
|---|---|
| Delay chip | PT2399 CMOS echo/delay IC, with a TL072 dual op-amp |
| Controls | Time, Repeats, Mix, Tone |
| Enclosure | 125B, hand-painted — red speckle with tarot-card “Cereal Killer” skull artwork |
| Power | 9V DC, center-negative (standard pedal supply); no battery |
| Bypass | True bypass, 3PDT footswitch |
| Build | Hand-soldered and finished by Onion Madder — a one-off prototype |
Circuit design: PedalPCB Cataclysm. Enclosure art, build, and finish by Onion Madder. “Cataclysm” and “PedalPCB” are used for identification only.