48) QuadHands Flip Unboxing and Review

For 30+ years I've been soldering boards flat on my bench, mostly because I haven’t found a device to hold my circuit boards in a comfortable position. Well, QuadHands contacted me to review one of their products and I decided I’d give it a shot, as their QuadHands “Flip” solution looked like something that’d work. So this is my first attempt at a product review. No sponsorship, no BS - just my honest opinion. Have a good one! Weird thumbnail? My answer to the ridiculous clickbait nonsense that's been going on. You're welcome. Classical jams: Brandenburg Concerto No4-1 BWV1049 - Classical Whimsical by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...) Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/

47) Getting started with FPGA’s using iCEBreaker

I’ve been looking around at FPGA dev boards in order to branch out from the usual micro controller world and get into some more advanced stuff. I got in touch with Piotr Tempski of 1Bitsquared and he sent me the iCEBreaker dev kit based around the Lattice ICE40 FPGA. This is at the date of this video release, an active Crowd Supply campaign (link below) - so I urge you to at least head on over there to take a look. It really is a nice way to get started in FPGA. In this video, I go over the basics of what it is, how to use it and how to install the toolchain required to program it. It’s a learning process for me, so apologies if I got anything wrong, but I thought it would be interesting for you to take the journey along with me. Hopefully I’ll integrate it into some upcoming projects. I had hoped to get into the Verilog code a little bit, but I think that’ll be for a separate video; This one was getting a bit long winded, so stay tuned. Thanks for watching! LINKS: iCEBreaker Crowd supply: https://www.crowdsupply.com/1bitsquar... Piotr’s WTFPGA lab (example 1): https://github.com/esden/WTFpga Piotr’s summon-fpga-tools: https://github.com/esden/summon-fpga-... Scanlime HDMI (example 2): https://github.com/scanlime/icebreake... iCEBreaker examples (example 3): https://github.com/icebreaker-fpga/ic... Clifford Wolf’s site: http://www.clifford.at/icestorm/

46) Does Your Solder Station Have a Fuse?

I recently watched Dave’s video on the 120V Weller soldering station that he accidentally plugged into 240V Aussie mains and subsequently released the magic smoke. Bobby Dazzler! This got me to thinking… does my soldering station also have a fuse on the primary? It doesn’t appear to. Some folks on twitter suggested that there’s a fusible link or a thermal cutout buried in the windings. Well, let’s get out the left-handed hammer, surgical gloves and find out, as we tear this thing down to bare bones. Link to EEVBlog smoking soldering station: https://youtu.be/8itTKH5tj3s

45) Solder Surface Tension and Why You Should Care

I have a PCB design that’s been giving me some trouble during the reflow process. That got me thinking, surface tension of solder is a pretty interesting and useful thing. In this video, I look at what surface tension is, how it’s useful and some of the problems that it can create. So come along for a ride while we play around with molten metal! (and please don't start hatin' because I'm not using chip-quick or alternate flux - this is just a demonstration)

44) Orlando Maker Faire 2018

Spent a little time at Maker Faire 2018, and if you missed it I thought it would be nice to share a few of the things that are there. ArcAttack put on an amazing show with a robotic drummer, guitars and tesla coils. You can see them throughout this short video and enjoy the tunes. I got to speak with many engineers, makers and hackers - all producing so many amazing things. Don’t forget the robots! And don’t forget to try and make it to your next Maker Faire!

43) Junk Box Current Source

I finally built a permanent-solution current source, albeit from my junkbox, but at least now I have something to pull off the shelf as I need it. There need to be some refinements, however hopefully it inspires you to make your own out of an LM317 adjustable regulator IC. I’ll show you roughly how I made it and why such a device is useful. We’ll use it in future videos to analyze band theory of semiconductor devices - what fun! So stay tuned!!! **sorry the audio is kind of messed up - the gain on my recorder automatically changed to max.. couldn't really reshoot this one. More links to excellent videos on current sources... they explain it much better than I can. If you haven't subscribed to these guys, come on now!!! : W2AEW - https://youtu.be/xR0RfmmRhDw Afrotechmods - https://youtu.be/iuMngik0GR8 Support: https://www.patreon.com/thecurrentsource Twitter: https://twitter.com/TCurrentSource Web: https://www.thecurrentsource.com/

42) Make a Rack Enclosure For Your Test Gear

I know, I didn’t make an electronics video specifically. But, if you have bunch of rack gear sitting around and can’t afford a full on rack cabinet, well you may be in luck. In this video I take some wood and some angle iron and make a 2U cabinet to give some studio equipment a proper home. This is all an in an effort to streamline the process of producing videos. I used it at the end of the video to record the end credits, and it worked great. Make some stuff!!! (BTW, you need to be concerned about airflow. In my case I didn't leave any gaps for convection as my equipment didn't require it. Please take this into consideration!) Follow more stuff here: @tcurrentsource www.thecurrentsource.com

41) Produced My First Kit! Optical Theremin

You may have noticed that I haven't made a video in a while. Well, I've been busy with work, travel and starting a small kit-producing business. We're all electronics nuts right? Well here's the instruction video that is a compendium to the paper instructions that come with the kit. Thought y'all electronics fans might get a kick out of it. The editing got a little goofed as far as the order goes, but I had to make some last minute changes to match the ever-evolving paper instructions - C'est la vie. I'll make a formal announcement once I'm fully up and running and the Tindie store is up, but you can check out the progress on the "real" website here: www.citruscircuits.io Follow more stuff here: @tcurrentsource www.thecurrentsource.com

Source: https://youtu.be/hfHTZhqByEY

40) Geiger Counter Teardown, Theory, Kits and Radioactive Measurements

For those of you who do not know, I'm on lockdown for 7 days after radioactive iodine 131 treatment for thyroid cancer. Luckily it's easily treatable. But then, there's boredom - so this episode is dedicated to Geiger counters, Geiger Meuller tubes & their basic operation, some theory, we build a Geiger counter kit from mightyohm.com and take some measurements of radioactive stuff - including myself!

Here's a link to Jeff Keiser's Geiger kit:

Viewer Questions about Sparky & a Demo!

Quick little video today (not charging Patreon supporters for this one) answering a couple of viewer questions about Sparky. The hot dog? Just a little human-analog demonstration about HV safety. And yes, I know I say the human body is mostly salt water - its not, google told me it's about 0.4%. I'm not reshooting this video just for that correction.

39) Electronic Components vs. 1.5kV

Howdy folks. As you know, we got the high voltage power supply working, so today we're just going to have a little fun. I have in possession a Kron Tech Chronos 1.4 high speed camera and a lot of electrons - so let's test out what happens when a variety of electronic components meet up with an electrical potential greater than they're used to.
Stay safe kids.

Thank you to Man or Astroman for letting me use the music. You guys rock!

38) Repairing a 4,000 Volt Power Supply

Ol’ Sparky’s finally thrown the hatch. What should output 4kV is putting out -2v; I know, it’s a sad day indeed. But fear not as we will get it working again in this video… or will we? Along the journey I point out a few things that are typical failure modes in old test equipment and replace a bunch of rotten components from the era of bellbottoms with new-old-stock components from the bellbottom era. I wasn’t sure if I would release this video, but I had the camera rolling during most of the process so I strung it together just for kicks and maybe as a warning to those who dare venture into purchasing rickety old test equipment. Enjoy the show.

37) Contact Bounce & Debounce Basics

Today we’re looking at contact bounce. Together with an oscilloscope and high speed camera, we can see a little more closely what happens during contact bounce. We also look at ways to mitigate this issue and show the effects of hardware debounce.

Another good resource for information on debounce is available at Jack Ganssle’s website:

A HUGE thanks to David Kronstein for lending me a Cronos 1.4 high speed camera which I used to make close up and detailed video of said bounce. http://www.krontech.ca/

36) DIY TEM Cell for EMC Pre-Compliance Testing

Today I’m attempting to make a TEM cell or transverse electromagnetic cell - used for doing EMC precompliance measurements. If you are trying to sell a product (legally), you must have your product reviewed and certified by an “EMC lab” for lack of a better term. This device will allow you to take some preliminary measurements to check and see if your whiz-bang product is radiating massive amounts of electromagnetic interference - before you dish out the big bucks at the certification lab. Happy testing!

Article referenced in the video:

Other interesting articles:


35) Part3: RocketCam Gets a New PCB + Pan/Tilt Testing

Howdy folks, its been busy! I couldn’t figure out what protocol the original PCB was running, so I created a replacement, partially funded by OshPark - so thanks Drew and Laen (+all other purple folks)! Anyway, watch as we compare boards, power it up, program it and test running the basic pan and tilt firmware.

34) Part2: RocketCam Power Up & Repair(?)

This is part 2 of the PTZ camera tracking project. This time I power up the main PCB and try to talk to it over RS232 from a serial terminal. Not much else to say here, so you’ll have to watch and see if it works or not!

33) Part1: Teardown Pan / Tilt RocketCam Project

This is part 1 of the PTZ camera tracking project. I want better footage of rocket launches over there at NASA - apparently they only let you get so close. The idea is to use OpenCV to track objects, but we don't know what we're dealing with yet - so let's tear it down!

32) How I Make Music for the Vids

Y'all know I make little ditties for the channel, well I don't have a lot of time to make videos these days so I thought I'd bang together a quick one. This is basically the process that I go through to make a short instrumental to use as background music while I show a time-lapse shot or while I solder something together. I know it'd be easier to just use pre-existing YouTube licensed music, but I don't like doing things the easy way. I hope you dig it, if not well there'll be more electronics stuff coming very soon. Have a good one!

31) Acrylic Bending for Electronics Enclosures

Somehow I always end up with circuit boards all over my desk and no enclosure to put them in. This is a simple nichrome wire bending machine that you can make on the super-cheap. Of course we had to ramp things up by using a microcontroller to switch it on an off, but you can just use a high current power supply or variable transformer. Please double check the current rating vs. temperature of the manufacturers data sheet to make sure you're getting to the temperature needed. I stuck between 600 and 700 degree straight-wire temperatures. Google is your friend here! This video is just to get you started. Good luck!

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PO Box 620241
Oviedo, FL 32762-241

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30) Op-Amps vs. Comparators

I’ve been playing around with comparators lately; More specifically I’ve been using op-amps as a comparator. I ran into a little bit of trouble that I hadn’t encountered before. I don’t go into all of the weird things that happen in using an op amp from the early 70’s, but we do look at headroom and slew rate limitations. I also build up a parking sensor for my garage using a window comparator. Entire project made using components funded by Patreon patrons. Thanks all!

The Current Source
PO Box 620241
Oviedo, FL 32762-241

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