rich27 / UtProSat Payload board - History

Worked on the BOM some more. Still need to add the SD card, crystal oscillators, and ferrite bead.

Added some more parts to the BOM. Almost done, but have to get going.

Rearraged come of the circuits and added new circuitry for the stepper motor driver.

Push with the PicoBlade 8pin connector for the ArduCam

Started creating the BOM. Got the coin cell battery holder, capacitors, and diodes. For the LDO's I added a protection diode in the event the input to the LDO is shorted. Also changed the analog input schematic to have 0 ohm resistors. Need to figure out if I need to bias the input voltage as we are using the op amps in single supply mode. Also need to change the MCU, add header pins to all comms channels, and add test points to all power inputs.

Added decoupling capacitors to the LDO's on the IMU's. Need to figure out if Boom tip IMU is going to be on board or not for prototype. Need to simulate/maybe redesign current sense circuit for stepper motors. Need to redesign sd card schematic. Pulled the original schematic from analog devices. Adafruit has a totally different setup that I saw before but forgot. Need to decide to change MCU to something else.

Everything is done. Just have to connect the circuits to the MCU and we are all set.

Finished the stepper motor schematic. Just need to add pins.

Almost done. Just designed a LDO for 3V to power the Thermopile. Need to design level shifter for I2C devices since all devices need to operate off of 3.3v logic.