Ch375serial
About the Ch375serial PCB
Ch375serial is an open source PCB design by ChartreuseK, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 73.8 × 31.1 mm, with 24 components from 15 distinct parts.
Other key parts include the CH375, MAX3232 and IP4234CZ6. By type, the board carries 13 capacitors, 3 ICs, 2 connectors, 2 resistors, 1 crystal and 1 fuse.
From the project
CH375-Serial Adapter
This adapter is designed to allow usb mass storage media to be accessible to a computer over standard RS232. As such it contains a CH375 to do the heavy lifting along with a MAX3232 rs-232 level shifter to drive full serial levels. An external regulated 5v source is required to power the device as well as any attached USB storage devices. This could be provided by a USB to barrel jack adapter with a cell phone charger, a stand alone switching wall supply, or possibly even by a ps/2 keyboard port tap that borrows some power from such a port.
Main components on the Ch375serial
Ch375serial bill of materials (BOM)
24 components, 15 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CH375 | SOP-28_8.4x18.16mm_P1.27mm | U1 |
| 1 | MAX3232 | SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | IP4234CZ6 | SC-74-6_1.55x2.9mm_P0.95mm | U3 |
| 1 | 12MHZ 12MHz | Crystal_HC49-4H_Vertical | Y1 |
| 1 | C456018 USB_A | USB_A_Molex_67643_Horizontal | J1 |
| 1 | C16214 Barrel_Jack_MountingPin | BarrelJack_Horizontal | J3 |
| 1 | Polyfuse 500mA | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | F1 |
| 1 | LED | LED_D3.0mm | D1 |
| 1 | C1015 FerriteBead_Small | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB1 |
| 8 | C49678 0.1µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C13 |
| 2 | 20PF 20pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8, C9 |
| 1 | C13967 0.47µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 2 | C340733 100µF | CP_Elec_6.3x5.9 | C11, C12 |
| 1 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 4K7 4k7 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
Ch375serial design files
The KiCad project lives in the ChartreuseK/ch375serial repository on GitHub; these links point at the commit this page was built from.
- LayoutCH375_Serial.kicad_pcb
- SchematicCH375_Serial.kicad_sch
- BOMbom.csv
Ch375serial: common questions
How big is the Ch375serial PCB?
The Ch375serial measures 73.8 × 31.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ch375serial?
24 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Ch375serial design files?
From the ChartreuseK/ch375serial repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Ch375serial design in my own project?
Yes, under the terms of its CERN-OHL-W-2.0 license, which ChartreuseK chose for the repository.