Enclosure not stated · 3 knobs
Black Effect Pedals Lava MachineVerified
Based on the Black Effect Pedals Lava Machine
From the post
Tobias from the band Green Orbit have traced a few pedals from a now obsolete producer called Black Effect Pedals. They were producing mostly fuzzes on the heavier end of the scale, suited for doom and stoner toanz. Lava Machine is based on Univox Unidrive with some tweaks and addons. Two onboard trimpots to tune in bias and the input signal, The gain control affect the negative feedback between the output buffer and input transistor and it has a treble cut tone control. According to Tobias it does boost, overdrive and fuzztone really well by using your guitar volume control.
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 25 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 3.9K | 3.9k | read from the layout by eye | |
| ×1 | 7.5K | 7.5k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 220pF | 220p | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 330nF | 330n | read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | ? | ? | value not given; read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N2222A | 2N2222A | read from the layout by eye | |
| Q2 | BC109C | BC109C | read from the layout by eye | |
| Q3 | BC108B | BC108B | read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | B10K | B10k | Potentiometer | read from the layout by eye |
| Tone | B10K | B10k | Potentiometer | read from the layout by eye |
| Volume | A10K | A10k | Potentiometer | read from the layout by eye |
| Trimmers 2 | ||||
| Input | 10K | 10k | read from the layout by eye | |
| Bias | 10K | 10k | read from the layout by eye | |