Making tutorial videos and project videos is a very different process. It is very easy to script a tutorial. In fact, I think it is a necessary step. Project videos, on the other hand, are more organic. In this project, I build a capacitive activated coin bank, based on this Coin Acceptor from Adafruit. It uses an MSP430 to do capacitive sensing and then a Pryamiduino to control the rest of the electronics. In the end, I do some classic AddOhms special effects to demonstrate how the project works. For detailed notes and design files, hit the button below for the element14 project page.

Bank to the Future on e14

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Date:August 24, 2018
Appearance:Bank to the Future on element14 presents
Outlet:element14 Presents
Format:Vlog

I have been soldering circuits for twenty-six years. Well, except for the last 6 weeks. I have had a Weller Zero Smog EL fume extraction unit in my lab. It has changed the way I solder. When I first used it, I thought “yes, this is nice. But not a necessity.” Then the other day I didn’t feel like moving the extractor to my secondary workbench. I was immediately irritated with myself for being lazy. The smoke was so annoying. I don’t know what else changed me so quickly.

The unit under test is the Weller Zero Smog EL Fume Extraction Kit. They sent it to me in partnership with element14 as a Roadtest review. (My previous review was on the 10 MHz Picoscope.)

Read Full Review on element14

Appearance:Weller Zero Smog EL Review on element14
Outlet:element14
Format:Other

When it is time to move away from delay(), it’s time to learn how to properly use millis(). If you’ve had trouble following my millis() examples, maybe a live tutorial will help.

In this AddOhms Livestream, I go through 4 code examples:

1. Blink, the one with delay(), as a starting point.

2. Blink Without Delay, line by line, what is it doing

3. PWM Fading without delay() (and with buttons)

4. Binary counter that uses buttons to speed up and slow down.

Appearance:Live millis() tutorial: AddOhms Live #5
Outlet:AddOhms Voideo Tutorials
Location:YouTube
Format:Vlog

Watch Archived Video: Unboxing Hackerboxes

Over the past year, I have been a Hackerboxes subscriber. When the first couple arrived, I opened them up immediately. In fact, I got my first ESP32 through Hackerboxes.

Sadly, I got caught up in so many things I stopped opening them causing them pile up. So to close out 2017, I’m Unboxing Hackerboxes live while answering your electronics questions. (more…)

Date:December 31, 2017
Time:09:00-10:00 PST
Appearance:Unboxing Hackerboxes and more Q&A on AddOhms Live
Outlet:YouTube
Format:Vlog

picoscope 2204a on element14

Previously, I wrote up a hands-on with the PicoScope 2204A. At the time I only spent a few minutes with the device. I used it to “debug” an I2C bus between an Arduino and OLED screen. Since that initial hands-on, I’ve used the PicoScope in my lab. Most notably, I hosted another “hands-on” via an AddOhms Live Stream. I used it for another live stream where I talked about op-amps. Unfortunately, the video isn’t watchable due to some technical difficulties.

However, both of those activities plus debugging a new project I’m working on, gave me a chance to understand this humble USB-based oscilloscope. Now that I’ve held well over a month of bench time with it, I can say I am happy with the 2204A. If you’re looking for a low-cost, but fully featured oscilloscope, give the PicoScope 2204A a consideration. For more details on why I feel that way, click the button below to see my full write review on element14.

Full PicoScope 2204A Review on element14

Appearance:PicoScope 2204A Review on element14
Outlet:element14
Format:Other

Download AddOhms Live iCal Reminder

Sunday September 24, 2017, I will host the 2nd live stream of AddOhms. My first live stream was a test for the technology pieces. I’ve made some refinements and am giving it a second try. For that reason, I’m keeping the topic really simple.

The Agenda for the Live Stream is:

  • Introduction
  • News (3 stories or projects that I found interesting)
  • Op Amps with the XL741
  • Q&A
  • Whatever surprises pop-up.

In the livestream, I’ll be talking about inverting and non-inverting circuits  using an op-amp. But I am not going to use just ANY op-amp. I’ll be using the MASSIVE XL741! (I did a review of Evil Mad Scientist Lab’s XL741 in the past.)

Download AddOhms Live iCal Reminder

Date:September 24, 2017
Time:17:00-18:00 PST
Appearance:Op Amps featuring the XL741 (and Q&A) on AddOhms Live!
Outlet:AddOhms Live
Location:YouTube
Format:Podcast

In this video, I discuss considerations for SSD Capacitors, with a focus on enterprise applications. (No, not the ship kind, the business kind.) As more consumer devices use solid state technology, it gets easier for us to forget the importance of keeping data safe during storage. While solid state drives are more robust than their spinning counterpart, they are not perfect. Just like with spinning drives, there is a small delay from when a write occurs until the data is stored permanently. The highest performance solid state drives parallelize data in a way to minimize this propagation time. However, these drives also keep an active copy of the allocation table in RAM.

Just like the RAM in a PC, when power is lost, so are the contents. So it is critical for a solid state drive to have a reserve bank of energy to dump the RAM contents into permanent storage. Modern drives use huge banks of capacitors to write out any RAM buffers when the system’s rail voltage suddenly disappears.

Learn how to choose Enterprise SSD Capacitors in the EE Journal Chalk Talk.

This video was created in cooperation with KEMET Electronics, Mouser, and EE Journal.

Date:August 29, 2017
Appearance:Enterprise SSD Capacitor Chalk Talk
Outlet:EE Journal's YouTube Channel
Format:Vlog

hddg22-banner

Oscilloscopes belong on the desk of every electrical engineer or hobbyist. They are invaluable in both debugging and characterizing a circuit. While most users can twist the knobs to make things show up on screen, most never fully understand what is happening behind the scenes. Having spent over a decade working at a couple of scope companies, I have unique insight into how these incredible machines actually work.

I’m super excited to be invited back to the Hardware Developers Didactic Galactic held at the SupplyFrame office (usually) in San Francisco. This time I’ll be talking about oscilloscopes (last time I spoke about Capacitors). The focus of my story is the mysterious “trigger” circuit found in all digital scopes. Which, ironically, is the last part of my presentation. 😉

If you’re in San Francisco this week, grab a seat at the HDDG22 Meetup.

Date:June 29, 2017
Time:18:30
Appearance:Signals Abound – #22 Hardware Developers Didactic Galactic
Outlet:SupplyFrame's Hardware Developers Didactic Galactic
Location:San Francisco, CA
Format:Other

IEEE EMC 2016

The 2016 IEEE International Symposium on Electromagnetic Compatibility is sponsored by, no surprise, the IEEE Electromagnetic Compatibility Society (EMC-S). The EMC Society is the largest organization dedicated to reducing EMI. The society looks at standards, measurements, interference techniques, equipment, and a broad range of other activities.

Previously, I attended the show when it was in North Carolina. A wide variety of information complimented into the deep technical sessions. The vendors on the show floor were varied. I find this to be one of the most technical shows I attend.

James at IEEE EMC 2016

For the IEEE EMC 2016 conference, I am attending on behalf of my day job. I’ll be on the tradeshow on Tuesday, Wednesday, and Thursday. Stop by the KEMET booth (#903) to learn about AC Chokes, EMI Filters, a flexible EMI shield, EMI Cores, and X/Y Safety Capacitors. Since I’ll be in Ottawa Monday through Friday, let me know if you’d like to meet up.

Finally, check out the EMC Society website if you’re interested in the group behind this conference.

Date:July 25, 2016—July 25, 2016
Appearance:IEEE EMC 2016 in Ottawa, ON
Outlet:IEEE EMC 2016
Location:Ottawa, ON Canada
Format:Other

KEMET Adds AEC-Q200 Capability

T598-Polymer-Electrolytic-Capacitor-150ppi-croppedBack in December, John Day’s Automotive Electronics Blog featured a post I wrote. The subject was KEMET’s (then) recent Automotive product introductions. Here’s a summary of the article.

KEMET has been working hard to meet the needs of automotive engineers in recent months. These efforts have resulted in several technology developments that will be of particular interest to design engineers involved with automotive electronic systems.

Firstly, the company made several key developments in polymer electrolytic capacitor technology. Recent additions to their high-voltage MLCC’s ArcShield line include new automotive grade parts rated for >500V and an X2-Rated Film capacitor that passes AEC-Q200’s qualification guidelines as well.

Read more on John Day’s Automotive Electronics about KEMET’s AEC-Q200 Polymer Electrolytic Capacitors.

 

Date:December 16, 2016
Appearance:KEMET Adds AEC-Q200 Capability
Outlet:John Day's Automotive Electronics
Format:Magazine