278: Bricks' Batteries Last Forever (Repeat)
Embedded11 Feb 2022

278: Bricks' Batteries Last Forever (Repeat)

Matthew Liberty shared good advice for lowering power. We talk about different ways to measure current (Matt has a nice write-up) and things software can do to decrease power consumption.

Sleeping is critical, of course, as is choosing your clock speed and setting the GPIOs to good states. Everything is fine until you start getting into the microamps, then your multimeter measurements may start to fail you. (EEvblog explains why in his uCurrent intro.)

Eventually, you may want to measure nanoamp sleep states along with amp-consuming wake states. Matt's Joulescope is a tool to do just that (Kickstarter goes live Feb 19, 2019!), automatically moving between 9 orders of magnitude of dynamic range and graphing the results on your computer.

Matthew's consulting company is JetPerch.

We mentioned Colin O'Flynn's ChipWhisperer which uses differential power analysis for security attacks. We also talked about Jacob Beningo's post on protecting your tools.

Find Matt on Twitter as @mliberty1.

Elecia is giving away a chapter of her O'Reilly book, Making Embedded Systems. It is Chapter 10: Reducing Power Consumption. Hit the contact link if you want a copy.

Episoder(569)

33: Quitting My Finnish Lessons

33: Quitting My Finnish Lessons

Alison Chaiken (Google+) and Elecia discuss what you need to know to get into development for the automotive market.  Check out Alison's she-devel site for a big list of links and resources or go to a...

2 Jan 201455min

32: Woo Woo Woo

32: Woo Woo Woo

Patrick Kane (@PSoC_Nation) is the director of the Cypress University Alliance, working with colleges to provide development kits and information to college (and high school) students. Happily, Patric...

24 Des 201341min

31: If You See a Dongle Run Away

31: If You See a Dongle Run Away

Producer Christopher (@stoneymonster) joins Elecia to look through their mailbag and talk about gift ideas. Podcasts we like: The Amp Hour 99% Invisible Radiolab 5x5 network's Back to Work Accidenta...

19 Des 20131h 15min

30: Eventually Lightning Strikes

30: Eventually Lightning Strikes

James Grenning (@jwgrenning) joined Elecia to talk about how to be a good programmer using Test Driven Development (TDD). James' excellent book on how to use TDD: Test Driven Development for Embedded ...

11 Des 201356min

29: Ducking the Quadcopter

29: Ducking the Quadcopter

Kathleen Vaeth of MicroGen Systems (@MicroGenSystems) spoke with Elecia (@LogicalElegance) about energy harvesting using MEMS devices. Some introductory videos: BOLT™ Micro Power Generator An energy ...

4 Des 201345min

28: A Lot of Wish Fulfillment

28: A Lot of Wish Fulfillment

Author Laura Lemay (@lemay) spoke with Elecia (@logicalelegance) about writing books, APIs, code, and science fiction.  Laura wrote many of the Teach Yourself ... in 21 Days books: her bibliography on...

20 Nov 201348min

27: You Are Blowing My Mind

27: You Are Blowing My Mind

From the MEMS Industry Group Executive Congress: Ivo Stivoric, co-founder of the Body Media which was purchased by Jawbone CEO Sam Guilaume and Dave Rothenberg of Movea Stephen Walsh, ISKN – iSketch...

13 Nov 20130s

26: The Tofu Problem

26: The Tofu Problem

In this in-depth technical discussion, Dr. Ken Lunde helps Elecia understand how to internationalize her (memory constrained) device. CJVK Information Processing, Ken's excellent O'Reilly book on inte...

7 Nov 20131h

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