2 layers30 × 100 mm
Moskill
telagod/moskill
MosKill - Smart Mosquito Swatter with BLE, Kill Counting & Statistics | ESP32-C3 + KiCad PCB + UniApp
95 parts2
2 layers54.1 × 30.5 mm
Asa
0x007E/asaAudio Signal Amplifier
- Size
- 54.1 × 30.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 20
- Pads
- 72
- Tracks, vias
- 49, 28
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Sep 2026
- Updated
- 11 Sep 2026
Overview
Asa is an open-source printed circuit board by 0x007E, from the 0x007E/asa repository on GitHub. It is a 2-layer board of 54.1 × 30.5 mm with 37 parts on 20 nets, routed with 49 tracks and 28 vias.
It is built around the LM386, AO3400A and BAT43. Its parts include 11 capacitors, 7 resistors, 3 diodes, 2 connectors and 1 IC. It belongs with the audio and music boards of this library.
Main components
3
LM386
SOP-80.2% 0℃~+70℃ 4V~12V 4mA 50dB 700mWx1@8Ω Analog voltage gain SOP-8 Audio Amplifiers ROHSGcoreAudio Power OpAmps
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
BAT43
DO-204AH-65℃~+125℃ 1 Independent 1V@0.2A 200mA 30V 4A 500nA@25V DO-204AH Schottky Diodes ROHSSTMicroelectronicsSchottky Diodes
README
README.md
ASA - Audio Signal Amplifier
The ASA is a board with an LM386 or any other audio signal amplifier. The board itself can be driven with a voltage between 5-12V. It adds and amplifies the given input signal(s) with a gain between ~50-200 to a connected speaker. If the supply of the board is available the green led is on. The board itself provides a reverse polarity protection.
| Experience | Level |
|---|---|
| Soldering |
Downloads
| Type | File | Description |
|---|---|---|
| Schematic | pdf / cadlab | Schematic files |
| Board | pdf / cadlab | Board file |
| Drill | Drill file | |
| BoM | xlsx / html | Bill of Material as Excel/interactive HTML |
| PCB | zip / tar | KiCAD/Gerber/BoM/Drill files |
Hardware
The pcb is created with KiCAD. All files are built with github actions so that they are ready for a production environment.
PCB
The circuit board is populated on one side. The best way for soldering the SMD components is within a vapor phase soldering system and for the THT components with a standard system.
Top Layer
Bottom Layer
Configuration
The gain of the ASA can be set with the RV2 trimmer. If the trimmer is not solderd the standard gain is around ~20. If R7 and C11 is solder bass boost mode is enabled.
Additional Information
| Type | Link | Description |
|---|---|---|
| LM386 | Low Voltage Audio Power Amplifier Datasheet |
R. GAECHTER
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 100u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1, C2, C3 |
| 3 | 1k | Resistor_SMD:R_1206_3216Metric | R1, R3, R4 |
| 2 | 100n | Capacitor_SMD:C_1206_3216Metric | C4, C9 |
| 2 | 10u | Capacitor_SMD:CP_Elec_4x4.5 | C6, C10 |
| 1 | 10R | Resistor_SMD:R_1206_3216Metric | R6 |
| 1 | 10k | Potentiometer_THT:Potentiometer_Piher_PT-10-V10_Vertical | RV1 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric | C5 |
| 1 | 350m | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 470u | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C8 |
| 1 | 4k7 | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV2 |
| 1 | 620R | Resistor_SMD:R_1206_3216Metric | R2 |
| 1 | 68k | Resistor_SMD:R_1206_3216Metric | R5 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23-3 | Q1 |
| 1 | BAT43 | Diode_SMD:D_MiniMELF | D1 |
| 1 | BZ5V1 | Diode_SMD:D_MiniMELF | D3 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | ESD | Symbol:ESD-Logo_6.6x6mm_SilkScreen | FID1 |
| 1 | Green | LED_SMD:LED_1206_3216Metric | D2 |
| 1 | LM386 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U1 |
| 1 | OH | Symbol:OSHW-Logo_5.7x6mm_SilkScreen | FID3 |
| 1 | QR | Images:QR_0x007e | FID4 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | Speaker | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | LS1 |
| 1 | Waste | Symbol:WEEE-Logo_4.2x6mm_SilkScreen | FID2 |
| 1 | n.B. | Resistor_SMD:R_1206_3216Metric | R7 |
| 1 | n.B. | Capacitor_SMD:C_1206_3216Metric | C11 |
| 1 | opt. | Capacitor_SMD:C_1206_3216Metric | C7 |
Questions
How big is the Asa PCB?
It measures 54.1 × 30.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Asa use?
37 parts, built around the LM386, AO3400A and BAT43. 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 Asa KiCad files?
From the 0x007E/asa repository on GitHub, at the commit this page was made from: the board is pcb/ASA.kicad_pcb and its schematic pcb/ASA.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Asa design in my own project?
Its repository states no licence, so its author keeps all rights: ask 0x007E before reusing the design.
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