EEVblog 1608 - Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 06, 2024, 03:36:29 am
content: 00:00 - Jumperless Breadboard from Architeuthis Flux & WokWihttps://www.tindie.com/products/architeuthisflux/jumperless/https://hackaday.io/project/191238-jumperless/log/222858-getting-started-using-your-jumperlesshttps://wokwi.com/https://www.digikey.com/en/maker/projects/jumperless/2e62cc88ee6145bc924041dd486de76fhttps://theamphour.com/599-an-interview-with-uri-shaked-wokwi-com/08:42 - Trying the software, it didn't go so well...21:20 - Automated probe connection function22:35 - My old IC Tester project23:32 - 16TB Hard Drive25:26 - Modius Headband: Induce sickness to loose weight?Lime Forge Ltd Sense See Bike Light :https://seesense.cc/collections/icon3/products/new-see-sense-icon329:36 - Assembly Specialists Breadboardhttps://assemblyspecialist.com/WebStore/breadboards.html35:11 - Sanwa PS8A Pocket Multimeterhttps://overseas.sanwa-meter.co.jp/products/digital_multimeters/ps8a.html45:26 - BENQ IdeaCam S1 Webcamhttps://www.benq.com/en-au/ideacam/supreme/s1-plus.html

author: BrianHG
author_rank: Super Contributor
timestamp: April 06, 2024, 04:39:32 am
content: @27:20, You are so wrong.... I did the exact opposite to a grand level.See my attached chart, and yes, it is authentic and to scale:(Ozempic is trash by comparison, I will never touch the stuff)Reference Chart:ozempic-and-weight-efficacyYes, that was done after 3 consecutive runs of long covid, loosing weight on a 1/2Kg (1.1 pound) cheeseburger diet, it is still working, and I'm approaching week 48...Ok, just to be fair, that 38 minutes on my high gravity bike every second day is like a 2 hour hike up a mountain.Well, ok, the cheeseburgers are made from minced pork filet mignon (or beef filet mignon when I can get it cheap), cooked rare, with fresh onions and hot mustard, and the cheese is 7 year old authentic cheddar while the bun is made from sprouted whole wheat bread.@27:40, Ok, I've done this for 11 months and I have gotten back to you as you instructed.

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: April 06, 2024, 02:47:07 pm
content: That Sanwa hard case is total fail. Look at the hinge, not a real hinge, just one of those continuous molded thin seam. That will separate with a few tens of articulations, at which point it will fall apart.

author: The_PCB_Guy
author_rank: Regular Contributor
timestamp: April 06, 2024, 02:48:27 pm
content: Note that on the Sanwa pocket meter, the center "Off" position puts the thumb grip of the range switch fully within the case. Otherwise it extends beyond the edge, preventing you from closing it while it's still turned on. Nice attention to detail, and a good reason for having the Off position where it is.

author: jonovid
author_rank: Super Contributor
timestamp: April 07, 2024, 04:27:47 am
content: one dodgy MailbagJumperless Breadboard, congratulations for making solderless breadboard complicated & expensivethis is like having a banana plug leads matrix patch board for all the test equipment on the benchModius Headband making yourself sick is not that hard to do.Pocket Multimeter ok it works but ..

author: pickle9000
author_rank: Super Contributor
timestamp: April 07, 2024, 04:52:07 pm
content: Jumperless BreadboardCool concept, I have no use but a variant could be super useful for remote experiment control or equipment hacking, like on the ISS.

author: golden_labels
author_rank: Super Contributor
timestamp: April 07, 2024, 06:20:29 pm
content: A very long time ago I had the same idea as this jumperless board. I decided it’s not viable. Too expensive, in particular with the spring contacts wearing out quickly, too complex for the purpose, too many issues with signal quality on semiconductor switches.That’s something I would love, if only it was possible to make it cheap and without all the downsides.

author: Dismounted
author_rank: Contributor
timestamp: April 07, 2024, 08:20:47 pm
content: I tore down and repaired a Sanwa PS-8 back in 2017 and posted about it here:https://www.eevblog.com/forum/repair/repairing-a-sanwa-ps-8-pocket-multimeter-in-progress!/msg1356489/#msg1356489That version was at least 10-15 years old then, so up to 20ish years old now. Interesting to see the evolution. Looks like some board revisions in the interim - e.g., used to use a Sanwa silk-screened multimeter chip. The one I repaired is still in my daily carry!

author: joeqsmith
author_rank: Super Contributor
timestamp: April 08, 2024, 04:57:55 pm
content: Watched the jumperless breadboard and like you, really didn't get it. For digital, FPGA. For analog, I had bought some of Analog Devices programmable analog ICs back when they were introduced. Never took off.I checked out their site and read all the hype, still didn't get it. High resistance makes it useless for digital. As far as wiring analog circuits, that's normally just plugging in some through hole components. This switch matrix they have isn't going to help me swap out components. Seems like you are adding a lot more work to a technique I normally consider quick and dirty.Oddly enough during my search I did not find a single circuit built on this breadboard!!Everything was software demos showing flashing LEDs.Show me something like this:https://www.eevblog.com/forum/projects/challenge-thread-the-fastest-breadboard-oscillator-on-the-mudball/msg3113578/#msg3113578***After watching some of their videos, imagine accidentally moving that power supply switch and smoking your circuit. 3.3 parts may not like the +/-8V rails. Then I wonder how much noise does all this stuff inject onto your circuits and how much leakage there is.I like copper...

author: thm_w
author_rank: Super Contributor
timestamp: April 11, 2024, 10:16:00 pm
content: Sure, I wouldn't use the breadboard but the design is still amazing.If the plastic is heat sensitive, probably the metal clips can be soldered in place first then the housing pressed down over top.Quote from: joeqsmith on April 08, 2024, 04:57:55 pmWhy would 80 ohms matter for low speed digital circuits (1MHz was stated in the video)? Bandwidth of the IC is 50MHz:https://www.wch-ic.com/products/CH446.htmlQuote from: joeqsmith on April 08, 2024, 04:57:55 pmMaybe:

author: Kleinstein
author_rank: Super Contributor
timestamp: April 12, 2024, 05:21:40 am
content: For a digital circuit 80 ohm can be OK in most cases, though not at the supply. For analog circuits 80 ohm can be anoying, especially as the switch resistance tends to be quite temperature dependent.

author: .RC.
author_rank: Frequent Contributor
timestamp: April 12, 2024, 09:52:53 pm
content: Did the inventer of that headband that makes you sick watch A Clockwork Orange, and think, that's a good idea.