2 layers152.4 × 101.6 mm
8088-FE2010A SBC
skiselev/micro_8088
Micro 8088 - IBM XT Compatible Processor Board based on Faraday FE2010 chipset
72 parts412GPL-3.0
2 layers65 × 62.5 mm
Speaker Oscilator
CoderGage/oscillating-speaker-synthA PCB design that creates a synth-like sound with an oscillating circuit.
- Size
- 65 × 62.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 12
- Pads
- 42
- Tracks, vias
- 64, 1
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 27 May 2026
- Updated
- 9 Aug 2026
Overview
Speaker Oscilator is an open-source printed circuit board by CoderGage, from the CoderGage/oscillating-speaker-synth repository on GitHub. It is a 2-layer board of 65 × 62.5 mm with 16 parts on 12 nets, routed with 64 tracks and 1 via.
It is built around the PN2222A. Its parts include 6 resistors, 3 transistors, 2 capacitors, 1 connector and 1 switch. It belongs with the audio and music boards of this library.
Main components
1README
README.mdOscillating Speaker Synth
A PCB design that creates a synth-like sound with an oscillating circuit.
I wanted to create something like a Stylophone that creates a synth sound, but with a simple circuit embedded in a PCB, with only pitch and volume control. I figured I could create some interesting sounds and play around with making multiple of them. I plan to expand on this project with more synth controllers, but I want to start with this one to get a basic understanding of synth circuits, PCB design, and Hack Club's YSWS opportunities.
Bill of Materials
| Part Name | Status |
|---|---|
| 10 uf capacitor | Have |
| 100 uf capacitor | Have |
| Barrel jack | Ordering from Adafruit (https://www.adafruit.com/product/373) |
| Speaker terminal block | Ordering from Adafruit (https://www.adafruit.com/product/724) |
| Transistors | Have |
| All resistors | Have |
| Potentiometers (variable resistors) | Ordering from Adafruit (https://www.adafruit.com/product/5277) and (https://www.adafruit.com/product/5282) |
| SPST switch | Ordering from Adafruit (https://www.adafruit.com/product/3221) |
Original project diagram
PCB schematic
PCB component placement
PCB 3d render with components
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | PN2222A | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1, Q2, Q3 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R5 |
| 1 | 10 uf | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C1 |
| 1 | 100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
| 1 | 100 nf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | 1000 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 100k | Potentiometer_THT:Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV1 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | 2k | Potentiometer_THT:Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV2 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_Horizontal | J2 |
| 1 | SW_SPST | Button_Switch_THT:SW_DIP_SPSTx01_Slide_6.7x4.1mm_W7.62mm_P2.54mm_LowProfile | SW1 |
| 1 | Speaker | TerminalBlock_4Ucon:TerminalBlock_4Ucon_1x02_P3.50mm_Horizontal | LS1 |
Questions
How big is the Speaker Oscilator PCB?
It measures 65 × 62.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Speaker Oscilator use?
16 parts, built around the PN2222A. 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 Speaker Oscilator KiCad files?
From the CoderGage/oscillating-speaker-synth repository on GitHub, at the commit this page was made from: the board is Kicad Files/Speaker Oscilator.kicad_pcb and its schematic Kicad Files/Speaker Oscilator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Speaker Oscilator design in my own project?
Its repository states no licence, so its author keeps all rights: ask CoderGage before reusing the design.
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