Embedded
Embedded
Sep 24, 2020
345: Do What Apple Says
Play episode · 1 hr 12 min

Gretchen Walker gave advice on creating a BLE iOS application.

Gretchen wrote The Ultimate Guide to Apple’s Core Bluetooth on the PunchThrough (@PunchThrough) blog. There are many other good posts on the blog about BLE from a device perspective and app development (iOS and Android). PunchThrough also makes LightBlue, a great BLE debugging app you can find wherever you find your mobile apps. 

PunchThrough is hiring embedded software engineers in the Minneapolis, MN area. 

Chris and Gretchen both recommend Ray Wenderlich’s site for learning about Swift. Chris also liked the Big Nerd Ranch books: iOS Programming and Swift Programming

Elecia liked the NovelBits.io writeup about getting maximum throughput on BLE.

Apple Accessory Design Guide

MacroFab Engineering Podcast
MacroFab Engineering Podcast
MacroFab, INC.
MEP EP#246: Doing Something Magical
MEP EP#246: Doing Something Magical Parker * Physicists build circuit that generates clean, limitless power from graphene * University of Arkansas physicists * Energy harvesting the thermal motion of graphene * Without getting all quantum about it, it seems to work by configuring the graphene as one electrode (or both) of a capacitor. As the graphene flaps in the breeze (actually Brownian motion, I assume), the changing geometry will change the capacitance. * The team's next objective is to determine if the DC current can be stored in a capacitor for later use * Youtube video Stephen * New test equipment design - picking the right opamp * Current sensing with a bit of a twist * Powered by +/-12V * Need to read current on the +12 and the -12 along with a +9V rail * Opamp needs to be capable of reading a voltage drop in an environment where the common mode voltage is at or near the opamp supply voltage * Current sense amplifiers * INA1x9 series amplifiers from TI * Supply and common mode range are independent of each other * 2.7v to 60v * Convert a voltage to a current then change the gain by selecting an appropriate load * Iphone 12 doesn’t come with a charger? * Are chargers necessary? * Don't we have like 300 of them lying around? * Apple states environmental reasons for dropping the charger * Also no earbuds * Examples of other products that lack the equipment necessary to function * Video game consoles? * Appliances? * Internet router?
41 min
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