Hello world,
I am currently making a pcb for a lipo-charger with load sharing for a research prototype[1].
The micro-usb of the charging schematic will be made flush with the outer wall of the casing for easy-peasy usb charging for our target group.
However, I only have space for a single micro usb socket. Next to it will be a breakout for a push-push sd card reader for the audio shield. So I was thinking on connecting the lipo-usb port to the teensy in such a way that it doubles as a way to program the teensy. This would allow us to upload software updates without needing to take the device apart.
I was looking at the schematic and the pins of the teensy’s micro usb port don’t seem to connect to any of its board’s pins[2]. The schematic however shows that some traces that are connected to the micro-usb port have dead ends (tiny black squares). Do these indicate pads on the board I could access?
Little curious side question: why are DAT1 and DAT2 of the micro SD card not used on the audio board[3]?
1 : Lipo charger + load sharing:
http://blog.zakkemble.co.uk/a-lithium-battery-charger-with-load-sharing/
2 : Complete Teensy 3.2 schematic:
https://www.pjrc.com/teensy/schematic.html
3 : Audio board schematic:
https://www.pjrc.com/store/teensy3_audio.html
I am currently making a pcb for a lipo-charger with load sharing for a research prototype[1].
The micro-usb of the charging schematic will be made flush with the outer wall of the casing for easy-peasy usb charging for our target group.
However, I only have space for a single micro usb socket. Next to it will be a breakout for a push-push sd card reader for the audio shield. So I was thinking on connecting the lipo-usb port to the teensy in such a way that it doubles as a way to program the teensy. This would allow us to upload software updates without needing to take the device apart.
I was looking at the schematic and the pins of the teensy’s micro usb port don’t seem to connect to any of its board’s pins[2]. The schematic however shows that some traces that are connected to the micro-usb port have dead ends (tiny black squares). Do these indicate pads on the board I could access?
Little curious side question: why are DAT1 and DAT2 of the micro SD card not used on the audio board[3]?
1 : Lipo charger + load sharing:
http://blog.zakkemble.co.uk/a-lithium-battery-charger-with-load-sharing/
2 : Complete Teensy 3.2 schematic:
https://www.pjrc.com/teensy/schematic.html
3 : Audio board schematic:
https://www.pjrc.com/store/teensy3_audio.html
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