Enclosure not stated · 2 knobs
Electro Harmonix The Worm / Madbean Charlatan
Based on the Electro-Harmonix The Worm / Madbean Charlatan
- Category
- EQ / Filter
- Build
- Vero· 29×34· 73 cuts, 30 links
- Layout
- Unverified · no build reported at Dirtbox Layouts yet
- Tags
- Electro Harmonix, Filter, Madbean, Modulation, Phaser, Tremolo, Vibe
From the post
A vintage big box The Worm with some useful improvemnts and mods by Madbean. The power section have been reworked by a voltage doubler and a voltage regulator for 9v to 15v operation. An internal volume trimpot is added. And the unknown original vactrols is replaced by a trio of LDR/LED pair. Schematic and more information is avaiable HERE.
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 50 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 3 values the reader of this layout was not sure of
- 47Ω standing resistor at column 3, rows B-E, top left: the label is partly hidden under the 1uF BP capacitor; three glyphs are visible ('47' plus a round one), read as 47Ω, could be 470Ω
- 475K standing resistor at column 17, rows AD-AF: printed clearly, unusual value
- 500K resistor at column 15, rows AE-AG: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 20 | ||||
| ×13 | 1K | 1k | read from the layout by eye | |
| ×6 | 1M | 1M | read from the layout by eye | |
| ×6 | 2.2M | 2.2M | read from the layout by eye | |
| ×5 | 100K | 100k | read from the layout by eye | |
| ×4 | 47K | 47k | read from the layout by eye | |
| ×4 | 22K | 22k | read from the layout by eye | |
| ×2 | 220K | 220k | read from the layout by eye | |
| ×2 | 270K | 270k | read from the layout by eye | |
| ×2 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 47Ω | 47 | read from the layout by eye | |
| ×1 | 390Ω | 390 | read from the layout by eye | |
| ×1 | 3.9K | 3.9k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 120K | 120k | read from the layout by eye | |
| ×1 | 180K | 180k | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×1 | 475K | 475k | read from the layout by eye | |
| ×1 | 500K | 500k | read from the layout by eye | |
| ×1 | 1.5M | 1.5M | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 10 | ||||
| ×3 | 10nF | 10n | read from the layout by eye | |
| ×9 | 68nF | 68n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×1 | 120nF | 120n | read from the layout by eye | |
| ×3 | 220nF | 220n | read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic, bipolar (BP); read from the layout by eye | |
| ×4 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×3 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic, 16v; read from the layout by eye | |
| Diodes 4 | ||||
| D1 | 10V Zener | 10V | read from the layout by eye | |
| D10 | 10V Zener | 10V | read from the layout by eye | |
| ×2 | 1N4148 | 1N4148 | D2, D3; read from the layout by eye | |
| ×3 | 1N5817 | 1N5817 | D7, D8, D9; read from the layout by eye | |
| Transistors 6 | ||||
| Q1 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q2 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q3 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q4 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q5 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q6 | 2N5088 | 2N5088 | read from the layout by eye | |
| ICs 3 | ||||
| IC1 | LM324 | LM324 | read from the layout by eye | |
| IC2 | LT1054 | LT1054 | read from the layout by eye | |
| REG | 78L15 | 78L15 | regulator; read from the layout by eye | |
| Opto 1 | ||||
| ×3 | 9203 | 9203 | LDR1-LDR3, 5-20k light - 20M dark; read from the layout by eye | |
| Potentiometers 2 | ||||
| Rate | B5K | B5k | Potentiometer | read from the layout by eye |
| Range | B5K | B5k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 100K | 100k | Volume; read from the layout by eye | |
| Switches 2 | ||||
| Man/Aut | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| Mode | 3P4T rotary | 3P4T ROTARY | read from the layout by eye | |
| LEDs 1 | ||||
| ×3 | 3mm green or yellow diffused LED | 3MM GREEN OR YELLOW DIFFUSED LED | D4, D5, D6, on the board facing the LDRs; read from the layout by eye | |