Circuit Cellar 345 April 2019 (PDF)

Issue #345April 2019 Video Technology in Drones 6: Build a Prescription Reminder: Using Raspberry Pi, By Devlin Gualtieri14: IoT Monitoring System for Commercial Fridges: Using LoRa Technology, By Tyler Canton, Akio Yasu, Trevor Ford and Luke Vinden22: High-Voltage Differential Probe: Amplifiers in Action, By Andrew Levido28: Build a PIC32-Based Recording Studio: Music from Micros, By Radhika Chinni, Brandon Quinlan and Raymond Xu34: Drone Video Technologies are Flying High: Cameras, Boards and Kits, By Jeff Child40: Low-Power Wireless Solutions Feed IoT Edge Needs: Integration Meets Innovation, By Jeff Child46: PRODUCT FOCUS: 32-Bit Microcontrollers: Wireless Workhorse, By Jeff Child50: EMBEDDED IN THIN SLICES: Bluetooth Mesh (Part 2): Provisioning Pondered, By Bob Japenga54: THE CONSUMMATE ENGINEER: Improving Software Quality: By the Book, By George Novacek58: THE DARKER SIDE: The Art of Current Probing: Mindful Measuring, By Robert Lacoste66: FROM THE BENCH: Building an All-in-One S