pcb-v6

Significant overhaul to the design

1. Uses a TI switcher which should be more robust
2. Increased input protection
3. Change to physical size of the PCB
4. Backup programming header is now simply SMD pads instead of holes, as USB-C programming has been bulletproof so far
5. Removal of the LED header
6. Reduction in the # of broken out GPIO pads
7. Improve RF
8. Increase annular rings
9. Optimize Nets
10. A few test points

pcb-v5

Significant overhaul to the design

1. Uses a TI switcher which should be more robust
2. Increased input protection
3. Change to physical size of the PCB
4. Backup programming header is now simply SMD pads instead of holes, as USB-C programming has been bulletproof so far
5. Removal of the LED header
6. Reduction in the # of broken out GPIO pads
7. A few test points

pcb-v4h

• Add 130ms startup delay to switching regulator with solder bridge to bypass RC
• Improve RF
• Increase C2 to 50V
• Increase annular rings
• Optimize nets
• Reduce C1 to 4.7uF
• Add test header

pcb-v4g

• Fix bypass capacitor routing issue
• Add status LEDs for 5V and 3.3V

pcb-v4f

v4f

pcb-v4e

Add some silkscreen to back side for polarity.

pcb-v4d

exclude j2 PN

pcb-v4c

• Add 0.1uF decoupling
• Re-add the programming header

pcb-v4a

• Change in dimensions slightly for easier screw access
• More breakout pads
• Remove programming header
• Add button for GPIO9 for first time programming

pcb-v3

v3 updates