Gj adapter
About the Gj adapter PCB
Gj adapter is an open source PCB design by gipi, published on GitHub. It is a 2-layer board measuring 21 × 26.5 mm, with 7 components from 5 distinct parts.
Other key parts include the ADG723. By type, the board carries 3 ICs, 3 connectors and 1 resistor.
From the project
This is a board to easily develop on Samsung's smartphones that have the serial port activated using a particular resistor value between the ID and GND of the USB connection.
This is a board to easily develop on Samsung's smartphones that have the serial port activated using a particular resistor value between the ID and GND of the USB connection.
To multiplex between the two possible routes I'm using the ADG723, a STSP switch. and the mode signal as input for the mux.
1. solder the ADG723 2. check they are working correctly 3. solder the USB connector 4. build the micro USB cable and use it to check connectivity of the connector 5. solder the USB cable 6. solder the UART header 7. solder the 619k resistor
Main components on the Gj adapter
Gj adapter bill of materials (BOM)
7 components, 5 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | ADG723 | MSOP-8_3x3mm_P0.65mm | U1, U2, U3 |
| 1 | Conn_01x05 | PinHeader_1x05_P1.00mm_Vertical | J1 |
| 1 | Conn_01x04 | PinSocket_1x04_P2.54mm_Horizontal | J2 |
| 1 | USB_B_Micro | ZX62D-B-5PA8 | J3 |
| 1 | 619k | R_0402_1005Metric | R1 |
Gj adapter design files
The KiCad project lives in the gipi/electronics-notes repository on GitHub; these links point at the commit this page was built from.
Gj adapter: common questions
How big is the Gj adapter PCB?
The Gj adapter measures 21 × 26.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Gj adapter?
7 components, from 5 distinct parts. The full bill of materials is listed on this page.
Where can I download the Gj adapter design files?
From the gipi/electronics-notes repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Gj adapter design in my own project?
The repository has no license, so all rights stay with gipi. Use it as a reference, and ask the author before reusing the design.
