Utils
About the Utils PCB
Utils is an open source PCB design by rabidaudio, published on GitHub under the MIT license. It is a 2-layer board measuring 31 × 69.8 mm, with 22 components from 9 distinct parts.
Other key parts include the TL074 and DG403. By type, the board carries 9 resistors, 5 LEDs, 3 transistors, 2 ICs, 1 connector and 1 diode.
It belongs with the audio designs in this gallery.
From the project
My custom synthesizer work
This is a collection of common tools for transforming signals, either control voltages or audio signals. While there are several distinct utilities, most are not mutually-exclusive.
When AIN is disconnected, OUT is a constant voltage output based on the position of the knob. OUT` is 0V when the knob is in the center position, and adjusts up to +/- 10V.
When AIN is supplied, it's value is buffered to OUT. The knob position linearly adjusts the output gain. At the center position, OUT is the same as AIN. At the full-left position, OUT is off. At the full-right position, the value of AIN` is…
Main components on the Utils
Utils bill of materials (BOM)
22 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL074 | DIP-14_W7.62mm | U1 |
| 1 | DG403 | SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 3 | 2N3904 | TO-92 | Q1, Q2, Q3 |
| 1 | EURORACK_CONN_16 | EURORACK_16_IDC | J6 |
| 1 | 200K | PinHeader_2x03_P2.54mm_Vertical | RV1 |
| 5 | AudioJack2_Ground_Switch | Jack_3.5mm_Ledino_KB3SPRS_Horizontal | A_IN1, B_IN1, GATE1, OUT1, ~OUT1 |
| 1 | LED | LED-3MM-SQUARE-ANODE | D1 |
| 8 | 100K | R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R1, R2, R3, R4, R5, R6, R7, R9 |
| 1 | 1K | R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R8 |
Utils design files
The KiCad project lives in the rabidaudio/synthesizer repository on GitHub; these links point at the commit this page was built from.
- Layoututils/utils.kicad_pcb
Utils: common questions
How big is the Utils PCB?
The Utils measures 31 × 69.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Utils?
22 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Utils design files?
From the rabidaudio/synthesizer repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Utils design in my own project?
Yes, under the terms of its MIT license, which rabidaudio chose for the repository.
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