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ZENDRIVE / AZIMUTH OVERDRIVE
Azimuth Overdrive
Hermida/Lovepedal Zendrive
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Controls & Usage
The Zendrive has the following controls:
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Drive
controls the amount of gain in the op amp feedback diode clipping stage.
•
Tone
controls the treble response of the effect.
•
Voice
controls the amount of bass while also changing the gain structure. As you turn it up, the available
gain range also increases.
•
Volume
controls the overall output.
Modifications & Experimentation
This one won’t be a whole lot of fun for a tweaker. The Zendrive is what it is, and with such a low parts count, if
you start changing values around then it quickly stops being a Zendrive.
The Azimuth Overdrive project is a clone of the Hermida
/ Lovepedal Zendrive. It was first released ... and in 2013
production was taken over by Lovepedal. The circuit has
changed very little since its inception, with the only major
change being the op-amp once Lovepedal took over.
The circuit is very basic, with a standard TS-style clipping
section followed by a variable R-C treble cut and a buffer.
The bass is adjustable via the “Voice” control, which
varies the corner frequency of the filter coming off the op-
amp. This also has the side-effect that the available gain
increases as the Voice control is turned up.
Despite the legendary stature of the Zendrive, the circuit
has the lowest parts count of any of my PCB projects and
is a great project for beginners.
Overview
