Amp
About the Amp PCB
Amp is an open source PCB design by rabidaudio, published on GitHub under the MIT license. It is a 2-layer board measuring 59 × 110 mm, with 111 components from 39 distinct parts.
Other key parts include the TL074, LM13700 and TL072. By type, the board carries 56 resistors, 17 connectors, 8 ICs, 8 capacitors, 4 transistors and 1 switch.
It belongs with the audio designs in this gallery.
From the project
My custom synthesizer work
Control Voltage 0-10V with 10V -> Gain=1, 0V -> Gain~=0. Can be overdriven up to 11V -> Gain=2 (actually slightly less because it will clip). Output is about 9.2 dB/V, with 0V around -98 dB.
Control voltage inputs are summed with a control knob, which adjusts CV between 0V and 10V.
The 4 channels are connected to the 4 channels from the filter, unless an input is supplied.
Main components on the Amp
Amp bill of materials (BOM)
111 components, 39 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | TL074 | DIP-14_W7.62mm | U1, U5, U6, U7, U8 |
| 2 | LM13700 | DIP-16_W7.62mm | U2, U3 |
| 1 | TL072 | DIP-8_W7.62mm | U4 |
| 4 | DMMT5401 | SOT-23-6 | Q1, Q2, Q3, Q4 |
| 1 | AIN_Jack | 3.5MM_Jack_Breakout_Vertical | J1 |
| 1 | BIN_Jack | 3.5MM_Jack_Breakout_Vertical | J2 |
| 1 | CIN_Jack | 3.5MM_Jack_Breakout_Vertical | J3 |
| 1 | DIN_Jack | 3.5MM_Jack_Breakout_Vertical | J4 |
| 1 | Conn_02x04_Counter_Clockwise | PinHeader_2x04_P2.54mm_Vertical | J5 |
| 1 | EURORACK_CONN_16 | EURORACK_16_IDC | J6 |
| 1 | ACV_Jack | 3.5MM_Jack_Breakout_Vertical | J7 |
| 1 | BCV_Jack | 3.5MM_Jack_Breakout_Vertical | J8 |
| 1 | CCV_Jack | 3.5MM_Jack_Breakout_Vertical | J9 |
| 1 | DCV_Jack | 3.5MM_Jack_Breakout_Vertical | J10 |
| 1 | EXT_IN | 3.5MM_Jack_Breakout_Vertical | J11 |
| 1 | A_OUT | 3.5MM_Jack_Breakout_Vertical | J12 |
| 1 | C_OUT | 3.5MM_Jack_Breakout_Vertical | J13 |
| 1 | B_OUT | 3.5MM_Jack_Breakout_Vertical | J14 |
| 1 | D_OUT | 3.5MM_Jack_Breakout_Vertical | J15 |
| 1 | MAIN_OUT | PinHeader_1x03_P2.54mm_Vertical | J16 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | HP_OUT | 3.5MM_Jack_Breakout_Vertical | J17 |
| 4 | 50K | R_Box_L14.0mm_W5.0mm_P9.00mm | RT1, RT4, RT7, RT10 |
| 4 | 5K | R_Box_L14.0mm_W5.0mm_P9.00mm | RT2, RT5, RT8, RT11 |
| 4 | 10K | R_Box_L14.0mm_W5.0mm_P9.00mm | RT3, RT6, RT9, RT12 |
| 1 | R_MASTER_VOL | PinHeader_2x03_P2.54mm_Vertical | RV1 |
| 4 | 10K | slide_potentiometer_35mm | RV2, RV3, RV4, RV5 |
| 1 | SW_STEREO_SPLIT | PinHeader_2x06_P2.54mm_Vertical | SW1 |
| 4 | 2.2u | C_Radial_D6.3mm_H5.0mm_P2.50mm | C1, C2, C3, C4 |
| 4 | 30p | C_Disc_D3.0mm_W2.0mm_P2.50mm | C5, C6, C7, C8 |
| 12 | 200K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R1, R2, R3, R4, R5, R6, R7, R8 +4 |
| 4 | 10K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R13, R14, R15, R16 |
| 4 | 470 | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R17, R18, R19, R20 |
| 4 | 820K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R21, R30, R39, R48 |
| 4 | 120K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R22, R31, R40, R49 |
| 4 | 270K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R23, R32, R41, R50 |
| 8 | 3K3 | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R24, R25, R33, R34, R42, R43, R51, R52 |
| 8 | 22K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R26, R29, R35, R38, R44, R47, R53, R56 |
| 4 | 27K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R27, R36, R45, R54 |
| 4 | 5K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R28, R37, R46, R55 |
Amp design files
The KiCad project lives in the rabidaudio/synthesizer repository on GitHub; these links point at the commit this page was built from.
- Layoutamp/Amp.kicad_pcb
Amp: common questions
How big is the Amp PCB?
The Amp measures 59 × 110 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Amp?
111 components, from 39 distinct parts. The full bill of materials is listed on this page.
Where can I download the Amp 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 Amp design in my own project?
Yes, under the terms of its MIT license, which rabidaudio chose for the repository.
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