4 layers100.5 × 61.3 mm
TanfolyamRobot
legokor/TanfolyamRobot
Korábban az STMicroelectronics által biztosított STM32CubeIDE-t használtuk a firmware fejlesztéséhez, azonban ez egy elég nehézkes és lassú eszköz.
79 parts2
2 layers89 × 99 mm
Isouart4
nedko/isouart4- Size
- 89 × 99 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 87
- Nets
- 108
- Pads
- 351
- Tracks, vias
- 648, 328
- Pours
- 16
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 19 Sep 2023
- Updated
- 7 Jun 2025
Overview
Isouart4 is an open-source printed circuit board by nedko, from the nedko/isouart4 repository on GitHub. It is a 2-layer board of 89 × 99 mm with 87 parts on 108 nets, routed with 648 tracks and 328 vias.
It is built around the CH344Q, 74HC123D and Π122U31, with the LP2950CDT-3.3 among its other parts. Its parts include 31 capacitors, 25 resistors, 10 ICs, 6 diodes and 5 connectors.
Main components
4
CH344Q
LQFP-48(7x7)-40℃~+85℃ 3.3V 4 6Mbps USB to UART、USB to RS232、USB to RS422、USB to RS485 LQFP-48(7x7) USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
74HC123D
SOIC-16-40℃~+125℃ 160uA 2 2V~6V 5.2mA 5.2mA 65ns 74HC Monostable Schmitt trigger SOIC-16 Monostable Multivibrators ROHSNexperiaMonostable Multivibrators
Π122U31
SOIC-8-40℃~+125℃ 1 1 150Kbps 150kV/us 3000 3V~5.5V 3V~5.5V 4.5us Fail-safe output High Level SOIC-8 Digital Isolators ROHS2Pai SemiDigital Isolators
LP2950CDT-3.3
TO-252-2(DPAK)-40℃~+125℃@(Ta) 1 100mA 126uVrms 3.3V 30V 380mV@(100mA) 93uA Fixed Over Current Protection、Over Temperature Protection Positive TO-252-2(DPAK) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSonsemiVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
Parts
87| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C6, C7, C8, C9, C10, C13, C22, C25, C28, C31 |
| 12 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7, R8, R12, R13, R16, R17, R20, R21, R24, R25 |
| 8 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C20, C21, C23, C24, C26, C27, C29, C30 |
| 8 | 220k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11, R14, R15, R18, R19, R22, R23 |
| 6 | LED_Dual_KAK | LED_THT:LED_D5.0mm-3 | D1, D2, D3, D4, D5, D6 |
| 4 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C14, C15, C16, C17 |
| 4 | 74HC123 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U8, U9, U10, U11 |
| 4 | Conn_01x04 | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J2, J3, J4, J5 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 4 | π122U31 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U3, U4, U5 |
| 3 | 100R | isouart4:FB_0805_2012Metric | FB1, FB2, FB3 |
| 3 | 2.2uF | Capacitor_Tantalum_SMD:CP_EIA-3528-15_AVX-H_Pad1.50x2.35mm_HandSolder | C1, C4, C32 |
| 3 | 4k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R9 |
| 2 | 22p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C18, C19 |
| 2 | 4n7 | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C12 |
| 1 | 100mA | isouart4:FuseX | F1 |
| 1 | 1M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 4K7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 8MHz | isouart4:Crystal_SMD_7050-4Pin_7.0x5.0mm | Y1 |
| 1 | CH344Q | Package_QFP:LQFP-48_7x7mm_P0.5mm | U7 |
| 1 | LP2950CDT-3.3 | Package_TO_SOT_SMD:TO-252-2 | U1 |
| 1 | OSHW | isouart4:OSHW | LOGO1 |
| 1 | USB_B | Connector_USB:USB_B_TE_5787834_Vertical | J1 |
Questions
How big is the Isouart4 PCB?
It measures 89 × 99 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Isouart4 use?
87 parts, built around the CH344Q, 74HC123D, Π122U31 and LP2950CDT-3.3. 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 Isouart4 KiCad files?
From the nedko/isouart4 repository on GitHub, at the commit this page was made from: the board is isouart4.kicad_pcb and its schematic indicators-ch1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Isouart4 design in my own project?
Its repository states no licence, so its author keeps all rights: ask nedko before reusing the design.
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