2 layers51 × 71 mm
2 layers36.8 × 38.6 mm
Usbttl
kc1awv/USB-TTL-TWRPlus2USB dongle for programming a LilyGo T-TWR Plus Open Edition
- Size
- 36.8 × 38.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 25
- Pads
- 89
- Tracks, vias
- 114, 23
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 10 Jul 2023
- Updated
- 11 Jul 2023
Overview
Usbttl is an open-source printed circuit board by kc1awv, from the kc1awv/USB-TTL-TWRPlus repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 36.8 × 38.6 mm with 23 parts on 25 nets, routed with 114 tracks and 23 vias.
It is built around the CH340G, AMS1117-3.3 and USBLC6-2SC6, with the LL4148 among its other parts. Its parts include 7 connectors, 4 capacitors, 3 ICs, 2 resistors and 2 diodes.
Main components
4
CH340G
SOP-16-40℃~+85℃ 2Mbps 3.3V、5V USB 2.0 USB to UART SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
LL4148
LL-341 Independent 1V@10mA 200mA 4A 4ns 500mW 5uA@75V 75V LL-34 Switching Diodes ROHSMDDSwitching Diodes
README
README.mdUSB-TTL-TWRPlus
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2, J3, J4 |
| 2 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C3, C4 |
| 2 | 33p | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | Conn_01x01_Pin | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J5, J6 |
| 2 | LL4148 | Diode_SMD:D_MiniMELF | D1, D2 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | CH340G | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-666 | U2 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J1 |
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Questions
How big is the Usbttl PCB?
It measures 36.8 × 38.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Usbttl use?
23 parts, built around the CH340G, AMS1117-3.3, USBLC6-2SC6 and LL4148. 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 Usbttl KiCad files?
From the kc1awv/USB-TTL-TWRPlus repository on GitHub, at the commit this page was made from: the board is hardware/0.1a/usbttl.kicad_pcb and its schematic hardware/0.1a/usbttl.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Usbttl design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).