1590B · 2 knobs
Frantone VibutronVerified
Based on the Frantone Vibutron· 3 other boards clone it
From the post
Great sounding tremolo here from Fran, and something for me to finally build with the batch of ICL8038 ICs I bought a couple of years ago! :o) To keep the size down and make it 1590B friendly I've done away with the rotary switch used in the original, and instead I've used a DPDT on/on/on toggle to select the waveforms. Functionally they remain identical and you will be able to select sine, triangle or square wave in exactly the same way, but remember to add the link noted. I've also added an optional "Fast" switch which isn't in the original, but will do what it says on the tin and so some people may like the extra effect. Thanks to KindaFuzzy on FSB for his schematic.
Info about the original:
Good Vibrations!
All of the warm, soothing tone you'd expect from a great vintage amp trem with the added versatility of selectable waveform. Designed with the single coil player in mind, this variable amplitude modulator is a favorite among those that want the highest fidelity and smooth performance combined. The Depth control allows you to dial in as much effect as you like, from the slightest hint of mellow sine wave smoothness to fully gated square wave effects. The added benefit of a wide Speed range makes this a very powerful tool for the serious musician. The Vibutron's lemon-lime motif is highlighted by the custom made cherry red Bakelite knobs.
Bon appetit!
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 27 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×9 | 10K | 10k | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×2 | 20K | 20k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 2K2 | 2.2k | read from the layout by eye | |
| ×1 | 2K | 2k | read from the layout by eye | |
| ×2 | 390R | 390 | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 91K | 91k | read from the layout by eye | |
| ×1 | 7K5 | 7.5k | read from the layout by eye | |
| ×1 | 10R | 10 | 1W; read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 22n | 22n | read from the layout by eye | |
| ×4 | 150n | 150n | read from the layout by eye | |
| ×1 | 220n | 220n | on the Fast switch; read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 1000u | 1m | electrolytic; read from the layout by eye | |
| ×1 | 2u2 | 2.2u | electrolytic, on the Fast switch; read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | 2N7000 | 2N7000 | MOSFET; read from the layout by eye | |
| ICs 3 | ||||
| IC1 | TLC2262 | TLC2262 | read from the layout by eye | |
| IC2 | LM741 | LM741 | read from the layout by eye | |
| IC3 | ICL8038 | ICL8038 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Depth | B100K | B100k | Potentiometer | read from the layout by eye |
| Speed | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 100K | 100k | read from the layout by eye | |
| Switches 2 | ||||
| Waveform | DPDT on/on/on | DPDT ON/ON/ON | toggle; read from the layout by eye | |
| Fast | DPDT on/on | DPDT ON/ON | toggle; read from the layout by eye | |
Other boards based on the Frantone Vibutron
- Frantone Vibutron Dirtbox Layouts
- Frantone Vibutron Effects Layouts (blog)
- VibroBot Tremolo PedalPCB · 125B · $12.00