Enclosure not stated · 6 knobs
EarthQuaker Devices OrganizerVerified
Based on the EarthQuaker Devices Organizer· 2 other boards clone it
From the post
Chris just sent me an another Spin FV-1 based layout. And he verified it. "This is a layout for the Earthquaker Organizer Polyphonic Organ Emulator that I drew up using the Pedalpcb schematic. Two things about this layout (which is verified - I have all ready built it):
1) it addresses the volume drop issue that was common in early traces of this circuit. The pedalpcb board now has a 20k trimpot to solve this, which I have simply converted to the 20k resistor that is on pins 13 and 14 of the quad op amp.
2) you will need some supplies - an FV adapter and the EEPROM with the algorithm - which I would recommend getting from pedalpcb. PCB Guitar Mania makes a clone of this but I did not see a listing on their site for an algorithm chip or an SMD adapter. The FV-1 adapter board that pedalpcb makes is quite easy to use and I would also recommend watching DK Pedals' tutorial on YouTube for soldering the FV-1, as it was very helpful to me. The EEPROM algorithm chip is available for about $6.00 and if you search 'Organ Donor EEPROM' you will find it. It is not listed on the regular EEPROM menu. Also - 2x14 rows of pin headers will be needed to go between the adapter board and your vero."
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 26 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- EEPROM: no part number printed on the drawing or in the legend
- 1m resistor at column 3 rows J-K: printed lower case 'm', read as 1M
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×5 | 100k | 100k | read from the layout by eye | |
| ×4 | 10k | 10k | read from the layout by eye | |
| ×2 | 1k | 1k | read from the layout by eye | |
| ×1 | 20k | 20k | read from the layout by eye | |
| ×1 | 1M | 1M | printed 1m; read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 8 | ||||
| ×9 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×2 | 100nF | 100n | one film, one ceramic; read from the layout by eye | |
| ×1 | 2n2 | 2.2n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 15pF | 15p | read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ICs 4 | ||||
| ×1 | TL074 | TL074 | read from the layout by eye | |
| ×1 | FV-1 | FV-1 | printed FV1; read from the layout by eye | |
| ×1 | EEPROM | EEPROM | 8-pin, part number not given; read from the layout by eye | |
| Q1 | 78L33 | 78L33 | regulator; read from the layout by eye | |
| Potentiometers 6 | ||||
| Mix | B100K | B100k | Potentiometer | read from the layout by eye |
| Up | B100K | B100k | Potentiometer | read from the layout by eye |
| Down | B100K | B100k | Potentiometer | read from the layout by eye |
| Choir | B100K | B100k | Potentiometer | read from the layout by eye |
| Lag | B100K | B100k | Potentiometer | read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Other 1 | ||||
| X1 | 32768 crystal | 32768 CRYSTAL | 32.768 kHz; read from the layout by eye | |
Other boards based on the EarthQuaker Devices Organizer
- Organic Device PCB Guitar Mania · 125B · €11.90
- Organ Donor PedalPCB · 125B · $16.00