2 layers100 × 100 mm
MCTheremin
profdc9/MCTheremin
Microcontroller based theremin using the STM32F103C8T6 bluepill board
99 parts11
2 layers100 × 100 mm
MCTheremin
profdc9/PicoTheremin2A theremin based on the Pi Pico
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 103
- Nets
- 91
- Pads
- 363
- Tracks, vias
- 584, 22
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 10 Jan 2025
- Updated
- 15 Feb 2025
Overview
MCTheremin is an open-source printed circuit board by profdc9, from the profdc9/PicoTheremin repository on GitHub. It is a 2-layer board of 100 × 100 mm with 103 parts on 91 nets, routed with 584 tracks and 22 vias.
It is built around the LM358, LM386 and 74HC04D. Its parts include 39 resistors, 29 capacitors, 16 connectors, 6 ICs and 4 switches. It belongs with the RP2040 boards of this library.
Main components
3
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational AmplifierLM386
SOP-80.2% 0℃~+70℃ 4V~12V 4mA 50dB 700mWx1@8Ω Analog voltage gain SOP-8 Audio Amplifiers ROHSGcoreAudio Power OpAmps
74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInverters
README
README.mdThis is a theremin based on the "Bluepill" devboard with a STM32F103C8T6 microcontroller. This material is copyrighted by Daniel Marks (KW4TI) and licensed under the Creative Commons License CC-BY-SA 4.0. Software is copyrighted using the zlib open-source license.
It consists of three parts:
MCTheremin directory - the stm32duino project
board - the PCB board in Kicad of the theremin.
genwaves - little octave script to generate the waveform data
Parts
103| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4, R5, R12, R13, R16, R17, R18, R28, R29, R35, R36 |
| 11 | 100 nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C7, C14, C15, C16, C17, C18, C19, C20, C28, C29 |
| 11 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R9, R11, R14, R24, R26, R30, R31, R32, R33, R34 |
| 6 | Conn_01x01 | Connectors:1pin | J7, J8, J11, J12, J14, J15 |
| 6 | Conn_01x02 | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J2, J5, J6, J9, J10, J13 |
| 5 | 100 nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C3, C11, C21, C22 |
| 5 | 2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10, R15, R37, R38, R39 |
| 4 | 10k | MCTheremin:Potentiometer_Big_Small_Combined | RV1, RV2, RV4, RV5 |
| 4 | 1k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8, R20, R22 |
| 4 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3, SW4 |
| 3 | LED | LED_THT:LED_D5.0mm | D1, D2, D3 |
| 2 | 10 nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C4, C27 |
| 2 | 100 pF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C8, C9 |
| 2 | 100 uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C5, C10 |
| 2 | 150 pF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C23, C25 |
| 2 | 2.2M | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 220 pF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C24, C26 |
| 2 | 220 uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C12, C13 |
| 2 | 220R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R19, R25 |
| 2 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1, Q3 |
| 2 | 2k2 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21, R23 |
| 2 | 74HC04 | Housings_DIP:DIP-14_W7.62mm_Socket | U1, U6 |
| 2 | AudioJack2_Dual_Ground_Switch | MCTheremin:PJ-3240-35mm-stereo | J3, J4 |
| 1 | 10 uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C6 |
| 1 | 2.2M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R27 |
| 1 | Barrel_Jack | Connectors:BARREL_JACK | J1 |
| 1 | DIN-5_180degree | MCTheremin:DIN5Circular | J21 |
| 1 | LM358 | Housings_DIP:DIP-8_W7.62mm_Socket | U5 |
| 1 | LM386 | Housings_DIP:DIP-8_W7.62mm_Socket | U4 |
| 1 | LM7805_TO220 | TO_SOT_Packages_THT:TO-220-3_Vertical | U3 |
| 1 | Pico | MCU_RaspberryPi_and_Boards:RPi_Pico_SMD_TH | U7 |
Questions
How big is the MCTheremin PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MCTheremin use?
103 parts, built around the LM358, LM386 and 74HC04D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the MCTheremin KiCad files?
From the profdc9/PicoTheremin repository on GitHub, at the commit this page was made from: the board is board/MCTheremin.kicad_pcb and its schematic InductorAntenna/InductorAntenna.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MCTheremin design in my own project?
Its repository states no licence, so its author keeps all rights: ask profdc9 before reusing the design.
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