rich27 / UtProSat Payload board - History

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.

Added level shifters for I2C channel. The plan is to put all IMU's (including the Boom tip IMU) on the same I2C channel because we do not have enough I2C channels on the MCU to go around. Thermopile will have it's own channel. The stepper motor schematic is the only circuit left in the design. Then I can integrate everything and begin the layout process for the PCB.

Rearranged the layout of the schematic sheets. Circuits are the same.

I edited the Thermopile schematic. It will be on board so there was no need for a connector. We could add some test points in the prototype to read I2C.