team-302.github.io

Component selection

EGR 314

Team 302

Tyler Winder, Sam Kohler, Jose Nava-Mesina,Tilak Raj Thanga Raj

Wind sensor

External ADC

Solution Pros Cons

  • Cheapest option of the three

  • Only has one channel
Option 1

  • Best range in input voltage

  • Out of range alert feature may cause problems
ADC081C027 8-Bit, 189kSPS, 1-Ch SAR ADC with I2C

  • Uses I2C

  • May not handle az heat
$1.141/each
link
Solution Pros Cons

  • Has the highest sample rate

  • Does not have as large sampling range
Option 2

  • Has an auto power-down mode when not receiving data

  • Temperature range not as high as would like

ADS7827

5.25V-2.7V, 8 bit, 250 KSPS, Synchronous Serial ADC

  • Uses I2C

  • Uses an external reference
$1.879/each
link
Solution Pros Cons

  • HaUses I2C more channels can be used for both sensors

  • Highest power consumption of the three
Option 3

  • Has three different modes

  • Most expensive

ADS7830

8-Bit, 8-Channel Sampling A/D Converter with I2C Interface

  • Uses I2C

  • Large footprint
$2.333/each
link

Choice: option 1: ADC081C027 8-Bit, 189kSPS, 1-Ch SAR ADC with I2C

Rationale: This ADC has the best input voltage range, temperature range, and is the cheapest of the three.

Op amp

Solution Pros Cons

  • Has multiple channels so could use both sensors

  • Very expensive
Option 1

  • Great operating temp

  • Overly large footprint
OPA4991MDYYREP

  • Has the highest slew rate

  • Will have unused channels
$10.10/each
link
Solution Pros Cons

  • Has two channels

  • Has the lowest slew rate
Option 2

  • Has the lowest minimum supply voltage

  • Has a lower bandwidth
OPA2310IDR

  • Has a good output current

  • Bigger footprint
$1.22/each
link
Solution Pros Cons

  • Cheapest option

  • Only one channel
Option 3

  • Smallest size

  • Not a very good output current
MCP6486UT-E/OT

  • Faster bandwidth

  • High offset voltage
$0.31/each
link

Choice: option 2: OPA2310IDR

Rationale: The reason we are choosing this one is it does have two channels which we can use both sensors through it, and all of its cons are still within the range of our product.

DC Generator

Solution Pros Cons

  • Contains a holder

  • Most expensive
Option 1

  • Strong wire connections

  • Have to buy 5 at a time
EUDAX Mini Generator Motors 3V-12V DC Motor

  • 1500 rpm at 3v

  • Can generate power up to 12 v
$2.00/each
link
Solution Pros Cons

  • Contain a holder

  • Can generate power up to 12 v
Option 2

  • Strong wire connection

  • Has to buy six at a time
Sntieecr 6 Set Mini Generator Motors 3V-12V DC Motor

  • 1500 rpm at 3v

  • Contains other items in order.
$1.67/each
link
Solution Pros Cons

  • Cheapest option

  • Weak wire pads
Option 3

  • Contains a gear

  • Does not contain a holder

MM10

DC Motor

  • Reliable

  • 16000 rpm at 3v
Free from work
link

Choice: Option 3: MM10 DC Motor

Rationale: This product is currently available to us for free and it does work with previous testing. Option 2 would be a good second option that would need to be tested.

Barometric Pressure Sensor

Solution Pros Cons
  • photo_component/image13.jpg

    Tracks temperature and barometric pressure

  • Not specifically barometric
Option 1

  • Customizable setup

  • More expensive
ICP-10125 Pressure Sensor

  • Easily replaceable

  • More than half the supply voltage needed for power budget
$7.35 each
link
Solution Pros Cons

  • Within the 3.3V operating range.

  • Absolute pressure readings instead of gauge pressure (needs extra calculations done)
Option 2

  • Simple circuit build

  • Sensitive to electrostatic discharge
LPS22HHTR

  • I2C and SPI compatible

  • Complex readout modes
$9.16 each
link
Solution Pros Cons

  • Low power mode available just in case

  • Readouts based on liquid, not air, requires extra calculations
Option 3

  • Gives accurate readings

  • Most expensive
DLC-L20G-U2

  • High resolution output

  • May give fuzzy barometric pressure readings
$48.51 per unit
link

Choice: Option 2: KP235XTMA2

Rationale: The KP235XTMA2 is the most reliable and inexpensive of the few options available for these types of sensors, and requires the least amount of calculations to be done in post compared to the other two. Option 1 would be a good fallback if needed.

Voltage Regulator

Solution Pros Cons

  • Supplies fixed voltage

  • Low Stock
Option 1

  • 6 week Lead time

  • Low current output
LM3671MF-3.3/NOPB

  • Good operating temperature

  • Low voltage range
$1.74/each
Link
Solution Pros Cons

  • Good voltage range

  • Expensive
Option 1

  • Best range in input voltage

  • Low stock
LM2594HVM-5.0/NOPB

  • Larger part easier to solder

  • Low current output
$6.65/each
Link
Solution Pros Cons

  • Good voltage range

  • Most expensive
Option 1

  • Best current output

  • Smaller pins
LM2596S-3.3/NOPB

  • High stock

  • May be difficult to solder
$1.141/each
Link

Choice: LM2596S-3.3/NOPB

Rationale: Best choice in terms of operation and for what our design needs. May be a bit on the expensive side but it covers all the bases where some of the other components fall a bit short with good stock availability. .

Motor System - Tilak

Motor Driver

Solution

Option 1

IFX9201SGAUMA1

DC H Bridge Driver

$4.88/each

From Digikey

Pros

  • Supports SPi

  • Can operate at 3.3V logic levels

  • Includes internal flyback diodes

Cons

  • No physical heatsink

  • Requires heatsink pad on PCB

Option 2

MCF8315A1VRGFR

DC H Bridge Driver

$4.50/each

From Mouser

  • FOC controller Three-phase BLDC motor driver

  • Anti-voltage surge (AVS) protection

  • Does not support SPI

Option 3

BD6210HFP-TR

DC H Bridge Driver

$1.99/each

From Digikey

  • Cheap

  • VREF Voltage Setting Pin Enables PWM Duty Control

  • Does not support SPI

Choice: Option 1: IFX9201SGAUMA1

Rationale: SPI is only provided in the above motor driver. Also includes a flyback diode.