This week’s accomplishments
- Spent many hours debugging the HV and LV circuits this week with Elijah!
- Assembled, probed, integrated and tested the HV power management PCB to control the heating element, with passing test results.
- Integrated the DC pump with the new power mosfet.
- Identified an issue with the circuit, where we were providing 5V to power the pump, but didn’t realize that there was also a voltage drop across the MOSFET:
- (1ohm) * (2A) = 2V drop across MOSFET.
- Solution: Increased DC supply to be 7V (5V pump + 2V MOSFET)
- (1ohm) * (2A) = 2V drop across MOSFET.
- Identified an issue with the circuit, where we were providing 5V to power the pump, but didn’t realize that there was also a voltage drop across the MOSFET:
- Completed testing for pouring water and for heating water with the team.
- Worked on final presentation.
Next Week’s Deliverables
- Continue integrating all systems and complete remaining testing.
- Ensure stability of new pump circuit, tune circuit by ensuring that gate current limiting resistor and gate discharge resistor values are appropriate through further testing.
- Add safety features to the gantry: cover to protect users from boiling water, securing all LV and power electronics to the gantry.
Status Report: On Schedule