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Issue #367 February 2021 Advances in Digital Signage 6: Multi-Sensor Device Measures Water Pollution: The UnifiedWater Project, By Andrei Florian 18: Giga-Bug: A Retro Game Revamp: Using Raspberry Pi and Python, By Chris Cantrell 24: Smart Gardening System Uses Raspberry Pi: The GardenPi Project, By Richard Sears 38: DDR4 DRAM 101: How it Works, By Nishant Mittal 42: Compact, Reliable Solutions Feed Digital Signage Needs: Small Systems for Big Displays, By Jeff Child 49: MCU Software Solutions Evolve for Today’s Needs: Support for AI, IoT and More, By Jeff Child 54: DATASHEET: Power/Battery Management ICs: Perfecting Power, By Jeff Child 58: EMBEDDED IN THIN SLICES: FreeRTOS (Part 2): FreeRTOS Tasks, By Bob Japenga 62: THE DARKER SIDE: Understanding Proper PCB Design (Part 1): 4-Layer Board Design, By Robert Lacoste 70: FROM THE BENCH: Crafting a Custom Dictionary: Using Liberty BASIC, By Jeff Bachiochi 76: Product News 78: Test Your EQ 79: The Future of Mesh Networking: Wireless Networks for Tomorrow’s Safety Challenges, By Angela Quinn

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