Enclosure not stated · 5 knobs
Seppuku Fx/Jordan Fontaine Memory LapseVerified
Based on the Seppuku Fx/Jordan Fontaine Memory Lapse
From the post
Another contribution by Jordan. Thanks mate!
I was playing with the Seppuku Fx Memory Loss that you had posted and made some adjustments for more versatility. The schematic we all have to work from is so sketchy I thought people might enjoy a thorough series of mods to it. S
First off I added a Mix control. It could probably be done better and would love to hear suggestions. The C Taper for Stability gives easier adjustment over where the latch up occurs in playing dynamics. I set values at the Filter control. The on/off/on gives a clean delay, dirty repeats and very dirty repeats. If you placed a 1u in either C2 or C3 it creates a totally nuts fuzz. I set components around the feedback and surge control to taste. The increased Time pot is for longer delay times, why wouldn't we want longer delay times?! I 86'd the switch for the LM386/Pins 1 & 8. I'm not going to use it but it wouldn't be hard for someone to wire it in.
The layout is not verified. It is the result of fixing the board I built from my original layout. Hopefully no one minds a few diagonal caps.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 28 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×4 | 10K | 10k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 220Ω | 220 | read from the layout by eye | |
| ×1 | 680Ω | 680 | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 7.5K | 7.5k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| Capacitors 7 | ||||
| ×6 | 100nF | 100n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×2 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 15nF | 15n | read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×2 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N5817 | 1N5817 | printed 5817; read from the layout by eye | |
| ICs 3 | ||||
| ×1 | LM386 | LM386 | read from the layout by eye | |
| ×1 | PT2399 | PT2399 | read from the layout by eye | |
| ×1 | L78L05 | L78L05 | regulator; read from the layout by eye | |
| Potentiometers 5 | ||||
| Stability | C50K | C50k | Potentiometer | read from the layout by eye |
| Delay | B100K | B100k | Potentiometer | read from the layout by eye |
| Feedback | B100K | B100k | Potentiometer | read from the layout by eye |
| Mix | B50K | B50k | Potentiometer | read from the layout by eye |
| Volume | B50K | B50k | Potentiometer | read from the layout by eye |
| Switches 2 | ||||
| Surge | SPST momentary | SPST MOMENTARY | normally closed momentary switch; read from the layout by eye | |
| Filter | SPDT on/off/on | SPDT ON/OFF/ON | toggle; read from the layout by eye | |