mirror of
https://github.com/oresat/oresat-c3-hardware.git
synced 2025-12-23 15:44:08 +00:00
34 lines
863 B
Plaintext
34 lines
863 B
Plaintext
X1.watchdog chip; open drain version, way better. (pull up resistor will be needed to shutdown)
|
|
|
|
X2.be able to powercycle card
|
|
-pchannel mosfet to pin 4 of J8
|
|
|
|
X3.Remove text in schematic for watchdog, put into design notes.
|
|
X4.change watchdog schematic picture.
|
|
|
|
X5.value display is broken on symbol for chip; need to fix.
|
|
|
|
|
|
X6.keep jp2 , Kill aux connector J1 and JP9; maybe kill JP 5,6,3
|
|
|
|
X7.RX and TX need to be switched for UART FTDI cable
|
|
|
|
X8. SDA/SCL pullups 4.7k, ESD protection, or such thing as an I2C driver chip.(protect from rest of circuit)
|
|
|
|
9.sheet 3, line needs 4V, but supply is only 3.3V
|
|
1. V bus to different 3.3 powerbus
|
|
2. or replace chip
|
|
|
|
10.radios schemic
|
|
2 radios to add
|
|
|
|
11.
|
|
** finish board this week ** 4 layer... needs more time.
|
|
|
|
|
|
**need value for pull up in 1
|
|
**pin for 2
|
|
**I think 6 is done
|
|
**Mile's says 7 is right
|
|
** need ESD
|