2 layers42.5 × 28.8 mm
C5VRX JACK DIY V2
Twotoz/C5VRX
Ultra-minimal, zero-CPU 5.8 GHz analog FPV video receiver using ESP32-C5 Wi-Fi 6 PHY MODEM_DIAG, BitScrambler WBFM demodulation & resistor DAC CVBS
18 parts515GPL-3.0
2 layers48.2 × 28.3 mm
a low-cost mp3 player
- Size
- 48.2 × 28.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 24
- Pads
- 55
- Tracks, vias
- 59, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Jul 2025
- Updated
- 1 Aug 2025
Overview
Loop is an open-source printed circuit board by ayaangrover, from the ayaangrover/loop repository on GitHub, published under the MIT licence. It is a 2-layer board of 48.2 × 28.3 mm with 11 parts on 24 nets, routed with 59 tracks and 0 vias.
It is built around the DFR0299, TP4056 and PJ-320D. Its parts include 4 switches, 3 resistors, 2 ICs and 2 connectors.
Main components
3
DFR0299
THroughholeTHroughhole V-Audio Modules ROHSDFRobotV-Audio Modules
TP4056
ESOP-8-40℃~+85℃ 1 1A 35uA 4.2V 4V~6.5V Charging IC Lithium Battery Support Support 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 ESOP-8 Battery Management ROHSUMWBattery Management
PJ-320D
SMD-30℃~+70℃ 12V 1A 3.5mm Headphone Jack Copper Gold SMD Audio Connectors ROHSSHOU HANAudio Connectors
README
README.mdLoop: Compact MP3 Player
Loop is a compact MP3 player that's designed to be simple and portable.
Features
- Can play and store up to 10,000 MP3 files from a microSD card
- 3.5mm TRRS headphone jack
- (Optional) speaker support
- Dual playback support(both headphones and speaker)
- USB-C charging
- 8-10 hours of battery life
- Physical buttons for control
- Custom 3D-printed case (magnet and screw versions)
Parts List
| Component | Source | Price |
|---|---|---|
| DFPlayer | Amazon | $10.00 |
| TP4056 | AliExpress | $2.00 |
| M2 Screws | Aliexpress | $2.00 |
| M2 Heatset Inserts | Aliexpress | $2.00 |
| LiPo Battery | Amazon (900mAh) | $8.00 |
| Audio Jack | LCSC | $11.50 |
| Buttons (x3) | LCSC | $0.60 |
| Resistors | LCSC | $1.41 |
| Speaker (x2) | Aliexpress | $1.90 |
| PCB | JLCPCB | $31.00 |
| Case | Printed via Hack Club #printing-legion | Free |
| MicroSD Card | Aliexpress | $3.00 |
| Total | — | $73.41 |
Enclosure
Designed in Fusion 360. Available in ./case.
Firmware
No firmware needed! DFPlayer handles all the playing.
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 1 | Conn_02x02_Top_Bottom | Connector_PinHeader_2.00mm:PinHeader_1x04_P2.00mm_Vertical | J1 |
| 1 | DFR0299 | Ayaan's Library:MODULE_DFR0299 | U1 |
| 1 | PJ-320D | easyeda2kicad:AUDIO-SMD_PJ-320D | CN1 |
| 1 | SW_SPST | easyeda2kicad:SW-TH_SK12D07VG5 | SW4 |
| 1 | TP4056 | Ayaan's Library:TP4056 | U2 |
Questions
How big is the Loop PCB?
It measures 48.2 × 28.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Loop use?
11 parts, built around the DFR0299, TP4056 and PJ-320D. 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 Loop KiCad files?
From the ayaangrover/loop repository on GitHub, at the commit this page was made from: the board is pcb/loop.kicad_pcb and its schematic pcb/loop.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Loop design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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