Jolin - Knobi

Product information "Jolin - Knobi"
Macro Controller

KNOBI is a multi-tool able to mix, attenuate, invert, display and multiply any kind of signal. Knobi can serve a wide range of purposes thanks to its internal signal path that makes use of some of the most useful building blocks of analog synthesis: a 4-channel mixer, a three-range offset, an attenuverter, a fixed manual gate and lastly a cascading multiple derived from the output stage of Agogô.

a, b, c and d are Knobi’s inputs while r is a fixed 5v reference output. The toggle switch next to d sets the range of the offset - the big knob below the meter. Connect a signal into one of the inputs to visualize its voltage value in the three digits meter. Keep in mind that this reading happens post offset and attenuverter - the smaller knob with (-) and (+) indications.

The pushbutton next to x4 adds a gate of 5v to the mix: with no input connected it will act as a manual gate output. Autopatch the r reference output into one of the inputs to use Knobi as a macro controller thanks the offset knob and switch to set the range and the attenuverter.

x1, x2, x3 and x4 are all cascading copies of the final signal path. Plugging a cable will break the normalization and the multiplication will reset starting from the next output. Four cables plugged in will output a copy at the same factor x1 - unity gain - making Knobi a versatile buffered multiple.

• Thermally compensated 5v voltage source with dedicated output.
• Four channel mixer with four buffered output.
• Built in 3 digits voltage meter post mix / attenuation / inversion.
• Offset with a dedicated three positions range toggle.
• Manual gate button tied to the mix.
• 4 cascading outputs in an open design configuration.
• Unique signal path: mix - attenuate - invert - add - visualize - multiplicate.
• “Whatever” power connector a.k.a. don’t mind the polarity.

SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
Current draw +12 V [mA]: 50
Current draw -12 V [mA]: 30
DIY Level: Medium/Advanced
Depth [mm]: 25
Width [HP]: 6
Format: 3U
Panel / Color: Black FR4
Manufacturer "Jolin"
Jolin is an audio electronics lab specialized in eurorack modules, sound sculptures and DIY workshops. The project was founded in Milan, Italy in the summer of 2018 by Federico Intrisano, hardware designer, and Pedro Ferragut, software engineer. The aim is promoting electronic music made with analog and digital synthesizers. Although our main activity is research, we also build hand-crafted instruments and DIY kits with educational aim.

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