mirror of https://github.com/CIRCL/Circlean
54 lines
1.4 KiB
Markdown
54 lines
1.4 KiB
Markdown
Daughter board schematic
|
|
========================
|
|
|
|
|
|
Note
|
|
======
|
|
the schematic has been created using GNU gEDA
|
|
|
|
|
|
Bill of material
|
|
================
|
|
Part list
|
|
- 3mm diameter low power LED Green
|
|
- 3mm diameter low power LED Yellow
|
|
- 3mm diameter low power LED Red
|
|
- PCB mounted SPST normally open push-button
|
|
- 26 (or 40) DIL poles pin-header female connector
|
|
- resistors (values are not critical)
|
|
510 Ohm (3)
|
|
16 KOhm
|
|
1.3 KOhm
|
|
|
|
Mechanical design
|
|
=================
|
|
coordinate (0,0) is located at the PCB corner near the power supply connector.
|
|
the X axis is along the longest side.
|
|
|
|
|
|
* hole_x1 = 3.50 ; // hole center x offset from PCB edge (uSD side)
|
|
* LedBtn_y = device_y - hole_y - 2.5 * 2.54 + tolerance ; // Y axis center position of LEDs and button(s)
|
|
* R_Led_x = hole_x1 + 29 + 2.54 + tolerance ; // X axis center position of red LED
|
|
* Y_Led_x = R_Led_x - 3 * 2.54 ; // X axis center position of yellow LED
|
|
* G_Led_x = R_Led_x - 6 * 2.54 ; // X axis center position of green LED
|
|
* Btn_x = R_Led_x + 4.5 * 2.54 ; // X axis center position of button
|
|
|
|
|
|
The LEDs and the push-button are positioned on the 2.54 mm (0.1 inch) grid
|
|
|
|
Relative to he GPIO connector pin 1
|
|
* along the X axis : -2 * 2.54 mm
|
|
* along the Y axis (in multiples of 2.54 mm)
|
|
* Green LED center : 4.5
|
|
* Yellow LED center : 7.5
|
|
* Red LED center : 10.5
|
|
* Push-button center : 15.0
|
|
|
|
The LEDs have a 3 mm diameter
|
|
The top of the LEDs are 11 mm above the PCB
|
|
|
|
|
|
|
|
|
|
|