MEP EP#299: Operation Scope Creep

<h4><a href="https://macrofab.com/blog/mep-ep299-operation-scope-creep/">MEP EP#299: Operation Scope Creep</a><br></h4><h4>8 Layer Design</h4> <ul> <li style="list-style-type: none;"> <ul> <li>Stephen is working on a 12 pcb design <ul> <li>11 pcbs done 1 left</li> <li>6 nets left to go out of 963</li> </ul> </li> <li>How to attack an 8 layer design? <ul> <li>Part placement</li> <li>Stackup prep</li> </ul> </li> </ul> </li> </ul> <h4>Multi Gauge Progress / Prop_Fan</h4> <ul> <li>Screen and navigation <ul> <li>CFA635-TFK-KL</li> </ul> </li> <li>Temperature <ul> <li>LTC2983 <ul> <li>Thermistors </li> <li>5V analog active sensors</li> </ul> </li> </ul> </li> <li>Level shifter <ul> <li>TXB0104DR</li> <li>Shift between the 3.3V MCU and the 5V LTC2986</li> </ul> </li> <li>Power filtering <ul> <li><a href="https://www.analog.com/en/analog-dialogue/articles/comprehensive-power-supply-system-designs-for-harsh-automotive-environments.html" target="_blank" rel="noopener">Comprehensive Power Supply System Designs for Harsh Automotive Environments</a></li> <li>LT8672</li> <li>LT8614</li> </ul> </li> <li>Air Quality <ul> <li>HPMA115C0-003 <ul> <li>PM2.5 Particle Sensor</li> </ul> </li> <li>Sensirion SGP40 <ul> <li>VOC Sensor</li> </ul> </li> <li>Sensirion SHTC3 <ul> <li>Temp and Humidity</li> </ul> </li> </ul> </li> <li>Last thing to finish on the design is to choose how to protect the inputs on the LTC2983 <ul> <li>Demo boards only use in series 100 ohm resistors</li> </ul> </li> </ul> <h4>Adventures in Plastic Injection Molding</h4> <ul> <li>Stephen got the mold state side <ul> <li>Second round of payment due</li> <li>Remember Duty/tax</li> </ul> </li> <li>Did the first round of prototyping - looking to validate the mold with more precise control <ul> <li>Material story <ul> <li>Polyethylene</li> <li>Polypropylene</li> <li>Heat/Temperature/Pressure</li> </ul> </li> </ul>