2 layers47 × 39 mm
Qrss clock tx
swharden/AVR-projects
A collection of standalone AVR projects written in C
32 parts184MIT
2 layers54.8 × 40 mm
Tiny Sound Source
13chuck13-ua/Tiny-Sound-SourceAVR ATtny as LPT DAC compatible with Covox Speech Thing and Disney Sound Source.
- Size
- 54.8 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 32
- Pads
- 97
- Tracks, vias
- 116, 11
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 9 Oct 2026
- Updated
- 17 Oct 2026
Overview
Tiny Sound Source is an open-source printed circuit board by 13chuck13-ua, from the 13chuck13-ua/Tiny-Sound-Source repository on GitHub. It is a 2-layer board of 54.8 × 40 mm with 23 parts on 32 nets, routed with 116 tracks and 11 vias.
It is built around the ATTINY2313A-SU and LM7805. Its parts include 11 capacitors, 4 resistors, 3 connectors, 2 ICs and 2 diodes. It belongs with the audio and music boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATTINY2313A-SU
SOIC-20-300mil-40℃~+85℃ 1.8V~5.5V 128Byte 128Byte 18 20MHz 2KB 8 Bit AVR Built-in FLASH SOIC-20-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LM7805
TO-2630℃~+125℃ 1 1A 20V 2V 42uV 5V 62dB@(120Hz) 8mA Fixed Over Temperature Protection、Short Circuit Protection Positive TO-263 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSYONGYUTAIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
KiCad/README.mdTiny Sound Source - KiCad files.
Schematic, PCB layout, and Gerber files.
The circuit has been tested and works correctly on:
- IBM PS/1 model 2121 80386SX-20MHz
- CMP MIG-32 laptop 80286-12MHz
Schematic
- R2 та C5 separate the long SELECT (INT1) signal from the short STROBE (INT0) pulses. Component values may need to be adjusted.
- R3 and C3 are the main PWM output filter.
- R4 and C4 are an additional filter for DSS mode. If you do not need this filter, replace R4 with a jumper and do not install C4.
- "Compatibility with the FTL Sound Adapter" is simply a jumper wire between pins 12 and 17 of the LPT connector.
PCB layout
Ready-to-use Gerber files are located in the Gerber subdirectory. If you wish to make changes and generate your own Gerber files, I recommend using the User.Drawings layer as F.Silkscreen.
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 104 | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C3, C6, C10, C11 |
| 4 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4 |
| 2 | 100uF | Capacitor_THT:C_Radial_D6.3mm_H11.0mm_P2.50mm | C7, C8 |
| 2 | 200 | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
| 1 | 10uF | Capacitor_THT:C_Radial_D6.3mm_H11.0mm_P2.50mm | C9 |
| 1 | 16 MHz | Crystal:Crystal_HC18-U_Vertical | Y1 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 224 | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C5 |
| 1 | 333 | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C4 |
| 1 | ATtiny2313 | Package_DIP:DIP-20_W7.62mm | U1 |
| 1 | AudioJack3 | Connector_Audio:Jack_3.5mm_CUI_SJ1-3525N_Horizontal | J2 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J3 |
| 1 | DB25_Male | Connector_Dsub:DSUB-25_Male_EdgeMount_P2.77mm | J1 |
| 1 | DSS-mode LED | LED_THT:LED_D3.0mm | LED1 |
| 1 | LM7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
Questions
How big is the Tiny Sound Source PCB?
It measures 54.8 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Tiny Sound Source use?
23 parts, built around the ATTINY2313A-SU and LM7805. 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 Tiny Sound Source KiCad files?
From the 13chuck13-ua/Tiny-Sound-Source repository on GitHub, at the commit this page was made from: the board is KiCad/Tiny_Sound_Source.kicad_pcb and its schematic KiCad/Tiny_Sound_Source.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tiny Sound Source design in my own project?
Its repository states no licence, so its author keeps all rights: ask 13chuck13-ua before reusing the design.
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