Voltage Regulator Board

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Presentation transcript:

Voltage Regulator Board Project Direction Report David Hoskins Josh Chapman

Objectives Regulate voltages for 5v and 5.1v Monitor Current Ability to shut off channels Create PCB that holds components in a 10 cm x 10 cm area (CubeSat standard)

Done So Far 95% of Schematic

Battery

Voltage Regulator Part #: LM317

Current Sensor Part #: INA169NA/3K

Microcontroller Part #: Atmega328

Inverter Part #: MM74HC14MX

Power Mosfet Part #: SI4204DY-T1-GE3

Logic Level Converter Part #: BSS138

Output Connector

Setbacks Voltage of regulator drops at currents above rating (1.5A) We have limited ADC pins on the ATMEGA328 Voltage for imaging experiment needs 5.1–5.2v

Tactics Measure regulator output voltage for shutoff decision Use multiplexer to switch ADC inputs from voltage regulator output to current sensor Use different resistor values for the voltage divider in the voltage regulator circuit

What Is Left? Add pull down resistors to schematic Add multiplexer to schematic Add battery connector to schematic Order resistors (pull down), multiplexer, and battery connector Design PCB layout and routing Order PCB Populate PCB with components