Description
The Nutclough is a portable audio amplifier complete with a loudspeaker, that can be used with a MP3 player, smartphone or similar audio source.
The kit was developed as part of Calrec's 50th Anniversary celebrations and is used in public workshops.
Initial design was carried out by Calrec and with PCB design by Boldport.
A special edition of the kit was given away at Open Source Hardware Camp 2014.
Useful resources:
Schematic
Board
Bill of Materials
| Designator | Value | Description |
|---|---|---|
| C1 | 220uf | capacitor, 16V radial electrolytic |
| C2 | 220nf | capacitor, 63v radial polyester |
| C3 | 47uf | capacitor, 16V radial electrolytic |
| C4 | 47uf | capacitor, 16V radial electrolytic |
| C5 | 470pf | capacitor, 100v ceramic |
| C6 | 47uf | capacitor, 16V radial electrolytic |
| C7 | 220nf | capacitor, 63v radial polyester |
| C8 | 220nf | capacitor, 63v radial polyester |
| C9 | 220uf | capacitor, 16V radial electrolytic |
| D1 | LED | 5mm LED, through-hole |
| IC1 | TBA820M | 1.2W audio amplifier, DIP8 |
| J1 | 3.5mm jack socket | 3.5mm stereo jack socket, PCB right-angle |
| J2 | 3.5mm jack socket | 3.5mm stereo jack socket, PCB right-angle |
| LS1 | 4W | loudspeaker, 4W, 4 ohm, 3 inch square |
| R1 | 330R | resistor, 0.25W 1% |
| R2 | 1R | resistor, 0.25W 1% |
| R3 | 27K | resistor, 0.25W 1% |
| R4 | 4K7 | resistor, 0.25W 1% |
| R5 | 4K7 | resistor, 0.25W 1% |
| R6 | 56R | resistor, 0.25W 1% |
| R7 | 470R | resistor, 0.25W 1% |
| SW1 | toggle switch | switch, PCB DPDT horizontal |
| VR1 | 10K | 10K log pot, through-hole |
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This project is © Calrec Audio Ltd, and is published under the terms of the Creative Commons Attribution 4.0 International licence.