Parts · Opto
GL5549
LDR (Photoresistor) 100-200 kΩ light 10 MΩ dark.1 circuit uses this part.
Datasheet · archived copy from Senba; kept here as it was not found on the maker's own site
Substitutes same kind
Optocouplers and photoresistors of the same construction; the response speed and resistance range set how an effect sounds. The figures are read off each part's datasheet (this one's from page 2), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.
This part
| Part | On | Dark | Rise | Decay | Boards |
|---|---|---|---|---|---|
| GL5549 | 100k | 10M | 20 ms | 30 ms | 1 |
CdS cell, 100 to 200 kΩ at 10 lux, gamma 0.9.
Alternatives
| Part | On | Dark | Rise | Decay | Boards | Differs |
|---|---|---|---|---|---|---|
| GL5537-1 | 20k | 2M | 20 ms | 30 ms | 2 | lower on resistance; lower dark resistance. CdS cell, 20 to 30 kΩ at 10 lux, gamma 0.6. |
| PDV-P9203 | 10k | 5M | 60 ms | 25 ms | 4 | lower on resistance. Bare CdS cell, 10-30 k at 10 lux and over 5 M dark; pair it with an LED in a light-tight sleeve for a homemade vactrol. |
| GL5528 | 10k | 1M | 20 ms | 30 ms | 3 | lower on resistance; lower dark resistance. CdS cell, 10 to 20 kΩ at 10 lux, gamma 0.6. |
| GL5516 | 5k | 500k | 30 ms | 30 ms | 9 | lower on resistance; lower dark resistance. CdS cell, 5 to 10 kΩ at 10 lux, gamma 0.5. |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Sprinklesounds Mot(not)onous Vero21×19 Unverified GL5549 · L78L05 · LM386 · PT2399 Sprinklesounds Mot(not)onous | Sprinklesounds Mot(not)onous | Vibrato / Chorus | Dirtbox Layouts | — | 7 | — | 27 |