Well timed Mailbag to save your money Part 1

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My year-end mailbag video contains devices and parts around our hobby, particularly around power and power delivery.
It is divided into two parts. The first airs on 11/11, and the second part airs one day later. Both in time to grab the singles day discounts.
My second channel: / hb9blawireless
Links:
Curve Tracer HW-210K: s.click.aliexpress.com/e/_Dcg... or amzn.to/470qzeN
T-Deck ESP32 with keyboard: s.click.aliexpress.com/e/_DFF... or amzn.to/466dvTL
T-Echo NRF52840 LoRa tracker: s.click.aliexpress.com/e/_DC0...
ESP32-C6 DevBoard: s.click.aliexpress.com/e/_DE7...
ESP32-H2 DevBoard: s.click.aliexpress.com/e/_Dln...
Small bag: bit.ly/3QSVgNl
30Ah Powerbank "brick": s.click.aliexpress.com/e/_DBS... or amzn.to/3QXhH49
20Ah Powerbank flat: s.click.aliexpress.com/e/_Dk0... or amzn.to/47vr406
Surface-PD connector: bit.ly/49o8Mjc
Lenovo-PD connector: s.click.aliexpress.com/e/_DCL...
Different PD connectors: bit.ly/3N13ErZ
PTS200 hackable soldering iron: s.click.aliexpress.com/e/_DBU...
Patreon supporter companies:
passiv-energie.gmbh/
www.welectron.com/
The links above are usually affiliate links that support the channel (at no additional cost to you).
Supporting Material and Blog Page: www.sensorsiot.org
GitHub: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
Discord: / discord
If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission on your purchases to buy new stuff for the channel
My Amazon.com shop: www.amazon.com/shop/andreassp...
For Banggood bit.ly/2jAQEf4
For AliExpress: For AliExpress: bit.ly/3MtXUY8 (just go on from here to your product)
For Amazon.de: amzn.to/2r0ZCYI
For Amazon UK: amzn.to/2mxBaJf
For ebay.com: ebay.to/2DuYXBp
Chapters:
00:00:00 Intro
00:01:05 Curve Tracer HW-210K for repair and education
00:04:49 New Espressif Boards (-H2 and -C6)
00:07:50 T-Deck (ideal Meshtastic board)
00:09:21 T-Echo Low power tracker for LoRa and APRS
00:11:18 Versatile and useful small bag
00:12:50 Two excellent power banks, including laptop interfaces
00:17:22 PTS200 hackable soldering iron (with ESP32)
profile.php?...
/ spiessa
www.instructables.com/member/...
Please do not try to email me. This communication channel is reserved for my primary job
As an Amazon Associate, I earn from qualifying purchases
#no#midroll#ads

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Опубликовано:

31 май 2024

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Комментарии : 159

@markusm.4556 6 месяцев назад

Oops, now I thought I'd missed a whole day. A video from Andreas on Saturday, we live in crazy times! 😬😱😂

@AndreasSpiess 6 месяцев назад

I wanted to be exact at the 11/11. I did not know where to ask to shift this date to a Sunday, so I had to shift my video ;-)

@cannaroe1213 6 месяцев назад

Thank you Andreas for making these videos. While i know you mainly as an educator, because you have taught me so many things over the years, our hobby has a lot of products that pretend to be tools and tools that pretend to be products. It's a messy business figuring it all out, let alone making educational content out of it. Truly well done!

@AndreasSpiess 6 месяцев назад

Thank you for your kind words!

@PedroMinatel 6 месяцев назад

You are welcome! I'm glad you enjoyed it.

@AndreasSpiess 6 месяцев назад

Thanks again!

@McTroyd 6 месяцев назад

Thanks for showing the USB-C to laptop adapters. I've been building some things with trigger boards, but it would be nice to get something like that for my laptop premade. 👍

@AndreasSpiess 6 месяцев назад

I assume it includes the same chip. I also showed barrel connectors with these chips in another video. This is why I love PD...

@wjn777 6 месяцев назад

Mailbag videos are great, and even better, a mailbag video on 11 11, thank you for sharing

@AndreasSpiess 6 месяцев назад

Glad you like them!

@juergenheisel7360 6 месяцев назад

As always, an interesting video for all hobbyists and just in time for the Aliexpess promotion week.

@AndreasSpiess 6 месяцев назад

this is no coincidence ;-)

@carsten4719 6 месяцев назад

That T-Keyboard looks exactly like the keyboard of the former Blackberry Bold.

@AndreasSpiess 6 месяцев назад

Maybe the same supplier ;-)

@teebeeonline 6 месяцев назад

all I can say is just Wow!. keep going man, beginners like me learn a lot from your videos. 😊

@AndreasSpiess 6 месяцев назад

Happy to hear that!

@siberx4 6 месяцев назад

I have one of those flat Baseus power banks and it's a great form factor! Way easier to slip into a bag along with other electronics than a big brick.

@AndreasSpiess 6 месяцев назад

Thanks for sharing your experience!

@hoggif 6 месяцев назад

Some great tips again. Thanks!

@AndreasSpiess 6 месяцев назад

You are welcome!

@nkronert 6 месяцев назад

A soldering iron with bugs 😮 You walk away and after 5 minutes of zero acceleration detected it switches to 1000°C 😊

@AndreasSpiess 6 месяцев назад

Then you can change the this behavior (if the iron survived). Where can you do this with other solderuing irons ;-)

@electronic7979 6 месяцев назад

Nice products and nice review video. I liked it 👍

@AndreasSpiess 6 месяцев назад

Thank you!

@BUY_YOUTUB_VIEWS_g0g68 6 месяцев назад

Your passion for this video is inspiring.

@AndreasSpiess 6 месяцев назад

Thank you. Even if I am old, I still enjoy such technology...

@jmr 6 месяцев назад

I'd really like the T-deck with epaper display... I guess I must make my own.

@AndreasSpiess 6 месяцев назад

So enjoy the project. Lilygo usually publishes their diagrams on GitHub.

@SightsToKeepInSight 6 месяцев назад

Top! Waiting for that power delivery video next year

@AndreasSpiess 6 месяцев назад

I think it is needed. With all the confusion ;-)

@mafhper 6 месяцев назад

Omg This soldering iron is what I needed 😮❤

@AndreasSpiess 6 месяцев назад

:-)

@joehoandroid 6 месяцев назад

This type of USB-C soldering iron but compatible to the JBC tips. Sequre has them for the different JBC cartrdidges Sequre S20 with c115 Sequre S60P with c210 (the Sequre S60 without P is an older version) Sequre S99 with c145 Review von SDG Electronics of the older S60 (without P): ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2NqDumeKurw.html You can have all the good tips, not only china clones. And the handle is shorter then the T12 style handpices which is good for the small SMD parts.@@AndreasSpiess

@TylerDurden-pk5km 6 месяцев назад

A introduction for a power bank or "DIY board" that can generate the newer USB-PD voltages for power up to 240W would be interesting - haven't seen many of those yet.

@d00dEEE 6 месяцев назад

Yeah, DIY board strikes a chord with me. I've been on the hunt for a board with like 5-6 USB-PD outputs that I could put on, for example, a Mean Well 2-300w@20v power supply. I'd like to eliminate all the little wall warts on the various routers, switches, miniPCs and other junk in the lab and have just USB C for everything. (One can dream...)

@AndreasSpiess 6 месяцев назад

I have no use case for such power. My newest iPhone consumes 26W max (and I will not use this speed because I want to keep the battery for as long as possible and over night, I do not need speed). Where do you see the need for 240W?

@TylerDurden-pk5km 6 месяцев назад

@@AndreasSpiess Laptops, power tools, solidering irons and bigger battery banks (including ones with mains output). Already today, laptops with build in GPUs can not be run through USB-PD at full power, because they need more than 100W under full load. DELL for example is or was using proprietary USB-PD extensions to provide 130W through USB-PD. I agree though, that it is not relevant for phones and tablets. PS: E-Bikes, Scooter, etc. may also be a valid use case.

@TheUnofficialMaker 6 месяцев назад

gotta give this list to momma, especially after tomorrow!

@AndreasSpiess 6 месяцев назад

Good idea. Saves you money ;-)

@skovgaard79 6 месяцев назад

Thank you Andreas

@AndreasSpiess 6 месяцев назад

You are welcome!

@simosagimain 6 месяцев назад

Thank you for the two-part mailbag, Andreas! I understand it wouldn't work with 'flat' powerbanks, but for the chunkier types I wish there would be options for some units to be filled by the buyer with a bank of pre-owned 18650s. Often with those energy banks what we need is only to change the controller side to something up-to-date with the latest charging protocols.

@AndreasSpiess 6 месяцев назад

You find those cases for standard 5V power banks. So I assume they will become available for USB-C, too.

@PhG1961 6 месяцев назад

Just awesome!

@AndreasSpiess 6 месяцев назад

Thank you!

@hankhulator5007 6 месяцев назад

Hi Andreas, nice things, especially the solding iron that stays quite cheap. I've seen (duno remember where) that paper ink displays have made a jump forward, as some can now display up to something like 1~2.5 fps, making them clearly usable for menus with a lot of sub-options - what I hope is to see their price will falling rapidly because it is very useful on battery powered devices.

@AndreasSpiess 6 месяцев назад

Indeed they are very good for some applications!

@avejst 6 месяцев назад

Interesting as always 👍

@AndreasSpiess 6 месяцев назад

Thank you!

@RFC3514 6 месяцев назад

6:24 - I expected the screen to show: "You see? I work!"

@AndreasSpiess 6 месяцев назад

It has some trigger messages stored. "You see? I work!" was not one of them ;-)

@RFC3514 6 месяцев назад

@@AndreasSpiess - Or maybe it's just _pretending_ to be less intelligent, waiting for the inevitable rise of our robotic overlords.

@benbonnell 6 месяцев назад

Thanks (Swiss) Mate!

@AndreasSpiess 6 месяцев назад

You are welcome!

@johnlaurencepoole6408 6 месяцев назад

After watching this Part I, I feel like a child on Christmas morning just after opening presents, but with the knowledge I will get a repeat experience tomorrow. And I feel like a parent who did not have to undertake the expense. What could be more pleasant?

@AndreasSpiess 6 месяцев назад

I am happy to create such feelings ;-)

@NicksStuff 4 месяца назад

18:20 Haven't you tested the Pine64? It's the "right'" open-source, USB-C, RISC-V, Bluetooth-compatible* soldering iron and is cheaper than your copy. *for data-logging or control

@AndreasSpiess 4 месяца назад

No :-(

@krusic22 6 месяцев назад

Regarding power banks, it's challenging to find one that can output more than 20W while being charged simultaneously. Some disable the output, others restrict the output to only 5V, and some reset the output when a charger is connected. Could you test for that in your testing of power banks/USB PD?

@AndreasSpiess 6 месяцев назад

To answer your question, did the following test: With both batteries (not fully charged), I connected a standard USB cable as a 1A load. Both continued to supply power when I inserted a USB-C cable for charging. And both were charged with PD voltages (checked with a tester). 20W was not possible in this setup (the white has only 1 USB-C port)

@bepstein111 6 месяцев назад

I've had the black version of that 65W Baseus charger for over a year now, mainly for powering my soldering irons, and I fly with it weekly for work. Got a much better deal on mine via amazon in the US. I think I paid 40 or 35 bucks for it.

@AndreasSpiess 6 месяцев назад

Indeed a good price! And thank you for sharing your experience!

@insolencePL 6 месяцев назад

I've seen reviews of similar powerbanks from alli. Problems with overheating and overstating capacity are common.

@tarakivu8861 6 месяцев назад

Baseus is quite a good brand and seller. Got multiple wall adapters from them and a powerbank, so far going strong.

@AndreasSpiess 6 месяцев назад

On the blade, overheating can be a problem, too if you discharge 100W for a certain time (it switches off). Here, I do not have such scenarios. The capacity seems to be ok (I never was able to completely discharge such a battery before I had the chance for recharging).

@torbenbang4259 6 месяцев назад

First of all I wan't let you know that I greatly appreciate the videos you are making and I follow them closely 😀 I have a small question. Is the Baseus power bank suitable as ups a tiny pc?

@AndreasSpiess 6 месяцев назад

None of the USB-C power banks I saw are good as UPCs (the same applies to power supplies, BTW). They stop the current at all connectors when you connect or remove a device at a different port. I assume, this has to do with their power management (they have to distribute the max current to the different connectors).

@r7boatguy 6 месяцев назад

The slim power bank is currently $99.99 on Amazon US, and there is a 20% discount on it, so $80. I may pick one up ...

@AndreasSpiess 6 месяцев назад

I think, Amazon also will offer "Black Friday" prices

@tonyh6309 5 месяцев назад

Beware - I bought a package of the PTS200 plus various TS tips assuming they would all be 100W tips running from my new Baseus 100W charger @ 20V. It turns out that only the TS tip included with the iron is 4ohms/100W - all the others are 8ohms/50W, which appears to be standard for TS tips. Ok, they work fine but I feel a bit cheated. According to a Pinecil wiki, it seems there are also 'short tips', ST which are 6.2 ohm/64W. Of course, none of the Aliexpress listings mention the tip power/resistance ratings :( [EDIT]: So where to find 100W tips? [EDIT 2]: I see Bangood sell a set: "Original 100W Solder Iron Tips Heating Elements Customized for PTS200 V2 Soldering Iron"

@AndreasSpiess 5 месяцев назад

Thank you for the additional info I did not know.

@MeisterQ 4 месяца назад

Sorry for the late question: About powerdelivery in future: Will you try to do own PCBs with PD Chips, controlled by arduino? There are like now projects. I want a custom made PCB with esp32 and powerd by powerdelivery 15V

@AndreasSpiess 4 месяца назад

I do not plan such a PCB because I do not see a use case. The PD video will come next Sunday.

@RuddODragonFear 6 месяцев назад

FRONT ROW AGAIN! 💯💯💯💯💯💯

@AndreasSpiess 6 месяцев назад

:-)

@byronwatkins2565 6 месяцев назад

How well does the curve tracer control base current/gate voltage? Is it a reasonable transistor tester?

@AndreasSpiess 6 месяцев назад

No, it is not a "complete" curve tracer. It only has two leads to measure current and voltage. Complete curve tracers have an additional cable to produce varying current of voltage for the base or gate. So you only can detect if a part works or not.

@zyghom 6 месяцев назад

the connectors for Surface and Lenovo: USB-C PD will deliver 19V only if the load asked for it - do both Lenovo and Surface speak PD protocol to the power supply?

@AndreasSpiess 6 месяцев назад

No, both have no clue about PD. And my old Samsung was "born" before PD was even defined. But a chip inside the adapter knows what to do (similar to the 9/12/15V barrel connectors I showed in another video).

@Sam3532 6 месяцев назад

I can’t help but assume (probably correctly) that the cells inside those cheap aliexpress power banks will be low quality & have less than half the charge cycles, on average, than a higher quality power bank, double the cost.. probably worth spending the extra if you don’t want to lose a good chunk of mah within a few years & especially if you plan on a lot of heavy use

@AndreasSpiess 6 месяцев назад

I do not know because none of my powerbanks reaches this point. Even if it would only support 100 cycles, it would be ok for me. I also keep in mind where all the premium car brands buy their batteries ;-) So there is hope.

@SwissPGO 6 месяцев назад

Hi Andreas,warm greetings and thanks from not to far away. Did you had a chance to measure the *real* capacity of the powerbanks?

@AndreasSpiess 6 месяцев назад

No, I did not. They are anyway too big for me and I never was able to drain one completety befoe having the chance to recharge it.

@marcus3d 6 месяцев назад

@@AndreasSpiessPlease do test them. I've never seen a Chinese power bank that is even half of what it claims.

@AndreasSpiess 6 месяцев назад

@@marcus3d Others already did the test. The were ok.

@RFC3514 6 месяцев назад

The iron is pretty cheap, but seems too thick; I think a TS-100 or Pinecil will be more comfortable to use for precision work.

@AndreasSpiess 6 месяцев назад

You decide. It is similar to my JBC.

@roblee04 6 месяцев назад

ESP32 Arduino Core 3.0.0 adds support for ESP32-C6 and ESP32-H2 pretty soon. Is there any reason you aren’t using esp-idf which natively supports them instead ?

@AndreasSpiess 6 месяцев назад

The IDF is not accepted in the broad maker community (also because it only works for Espressif chips). The Arduino library and chip support is outstanding.

@EsotericArctos 6 месяцев назад

I don't really understand the fascination with upgrading features on a soldering iron, and the difference between left and right handed use. It's a soldering iron, it just has to get hot and melt solder..... Just my thoughts on a doldering iron. The sleep mode is nice, and fast heat up, but I don't know what other features a soldering iron needs :)

@AndreasSpiess 6 месяцев назад

As a left-handed person, I like the left-handed mode. Not because I am woke, because it is more comortable...

@marchoekstra1076 6 месяцев назад

Now the big question: Does the 30Ah 65w Powerbank fit in the small bag you purchased?

@AndreasSpiess 6 месяцев назад

No. There I have a "standard" 5V power bank with less capacity. But it also has to be flat.

@GermainStaquet 6 месяцев назад

From Surface Pro 7, you can charge with USB-C if you wish.

@AndreasSpiess 6 месяцев назад

Good decision by Microsoft!

@AjinkyaMahajan 6 месяцев назад

I thought there will be shopping for Dishika Cat too.

@AndreasSpiess 6 месяцев назад

She gets everything she needs. But from local retailers, not from China ;-)

@MatSmithLondon 6 месяцев назад

PTS200 - does it go higher than 320 Swiss Volts? (I mean degrees of course?) Also the higher wattage power bank you have - maybe that gives faster heat up?

@AndreasSpiess 6 месяцев назад

I mesured 452 Swiss Volts (degrees) max on the 450 degrees setting. The heatup is pretty fast if your PD source can deliver 20V. A few seconds to 330 degree (my normal soldering temp).

@MatSmithLondon 6 месяцев назад

@@AndreasSpiess Thank you! Looks like the best PD soldering iron, I already have two TS100 irons but I'd like to solder directly from a USB power block so I'll be buying this plus the block you recommended too!

@AndreasSpiess 6 месяцев назад

@@MatSmithLondon You can also buy a PD barrel connector delivering 20V and use it with the TS100. Costs only a few dollars (search for "USB C Type C PD to 9V 12V 15V 20V 5.5x2.1mm Power Supply Cable" on Google

@MatSmithLondon 6 месяцев назад

@@AndreasSpiess I didn’t think of that idea. Thanks!

@qwaqwa1960 6 месяцев назад

Any idea how safe it is to use a 20V USB-C to MagSafe connector for MacBooks that are expecting 19V? I find it hard to believe Apple (& others) would design something that'd be fine @19 & not @20, but...never know...

@TheUnofficialMaker 6 месяцев назад

At 20000 mAh capacity, Baseus offers fast charging and 100W USB-C output. The power bank has two USB-C and two USB-A ports to charge four devices simultaneously. The company claims to charge the 16-inch MacBook Pro up to 36% in only 30 minutes. It’s safe to estimate similar, if not better, results for MacBook Air. If you have a 60W USB-C PD wall charger, you can fully charge the power bank in only 1.5 hours.

@AndreasSpiess 6 месяцев назад

I saw that charging with 100W does only work for a short time with this Blade battery (it seems to overheat). Since I do not use Magsafe, I cannot answer your question. I would assume it works if MagSafe is PD compliant. But not, at which power.

@deslomeslager 6 месяцев назад

I like the Next Generation AIot Development tool. Please give us the url for it. It looks great, and I assume it works with home assistent?

@AndreasSpiess 6 месяцев назад

Did I mention such a tool?

@deslomeslager 6 месяцев назад

@@AndreasSpiess Yes, you showed it. It is the big box at 5:02, it is also called esp32-s3-box-3. See watch?v=KGVOi1Mrjb0

@ryanokeefe12 6 месяцев назад

You can charge Microsoft surface devices directly via the USB-C port.

@RandornCanis 6 месяцев назад

If I remember, his Surface was just before USB-C. Even newer Surface's, you might not want to take up your only USB-C or buy a dock.

@AndreasSpiess 6 месяцев назад

@RandornCanis is right. Poor RU-vidr here with old gear ;-)

@hypercube33 6 месяцев назад

What USB-C cables are those? They look awesome!

@AndreasSpiess 6 месяцев назад

I do not remember when I bought them or if they came with a device :-(

@masaengineering1766 6 месяцев назад

Is there another video where you discuss the balloon tracker ?

@AndreasSpiess 6 месяцев назад

Yes (#360)

@procactus9109 6 месяцев назад

For years I thought you were smart. iOS.... Owell I'll chop and choose my subscriptions

@AndreasSpiess 6 месяцев назад

I like my iPhone (and I would not bet on which supplier is worse). I use it for three years and my wife then another three years. Still with full SW updates. Reduces waste and saves a lot of money.

@procactus9109 6 месяцев назад

@@AndreasSpiess atleast with new EU laws you can take the battery out to stop it from spying. It's such a bad company to just let them have everything you own on it. I'd like to know more about their network that communicates from phone to phone even while turned off apparently.

@chuxxsss 6 месяцев назад

Even Andreas have not gone out for gold yet. Look up thunderstorm generator, mate. 😉

@AndreasSpiess 6 месяцев назад

We only have gold on banks. We exactly know where it is (no searching needed). But not easy to get.

@chuxxsss 6 месяцев назад

@@AndreasSpiess Lots of searching, son sold 8 grams the other week for 90 dollars a gram.

@AndreasSpiess 6 месяцев назад

@@chuxxsss Here everything goes into the other direction with all the stuff on order because of singles day ;-)

@EquatorialVillager 6 месяцев назад

I notice you use a VPN on your tablet. What location do you usually set to for this shopping?

@AndreasSpiess 6 месяцев назад

I use Zerotier as a private VPN. Not for shopping

@wernerviehhauser94 6 месяцев назад

Huh... I now a want a curve tracer. I think I'll have my students make one in project class :-)

@AndreasSpiess 6 месяцев назад

An interesting project for students. And also good to show the different effects of parts.

@wernerviehhauser94 6 месяцев назад

@@AndreasSpiess True. But I'm questioning myself if I am asking too much of grade 11 highschool students.

@bteixeira2013 4 месяца назад

Can the ESP32 H2 act as an hub for zigbee in home assistant?

@AndreasSpiess 4 месяца назад

I you find the right software it should be possible.

@bteixeira2013 4 месяца назад

@@AndreasSpiess it would be great to have ESPHome managing it for home assistant. But I'm afraid I'm not skilled enough to make it work... 73 de CT2HUU

@ktostamuser2 6 месяцев назад

This black powerbank is named Baseus Blade?

@AndreasSpiess 6 месяцев назад

Yes

@FuriousGeorge-wy9hq 6 месяцев назад

Does the echo need a sim card to us gps?

@AndreasSpiess 6 месяцев назад

No. It has no GSM modem included.

@TheUnofficialMaker 6 месяцев назад

curve tracer link is kaput

@cronopio12345 6 месяцев назад

the solder has the pine64 logo?

@AndreasSpiess 6 месяцев назад

Which solder?

@cronopio12345 6 месяцев назад

sorry for the bad english, the soldering iron pts200

@AndreasSpiess 6 месяцев назад

@@cronopio12345 I did not see one

@phinok.m.628 6 месяцев назад

Missed opportunity, to show and explain the difference between fast and slow diodes on the curve tracer.

@sail4life 6 месяцев назад

Well, there are also fast and slow learners. @@cannaroe1213

@AndreasSpiess 6 месяцев назад

Would 14kHz be enough to show the difference?

@phinok.m.628 6 месяцев назад

@@AndreasSpiess If you use a normal mains rectifying diode (for 50 Hz), I'm pretty sure you'd see a different path for the rising and falling voltage. Maybe not a huge difference, but I'd surprised if you wouldn't see a clear difference between a normal rectifying diode and a fast recovery diode. Why not try it out and see?

@emilalmberg1096 6 месяцев назад

150C, not 150V...

@AndreasSpiess 6 месяцев назад

You are right!

@johnlaurencepoole6408 6 месяцев назад

@@AndreasSpiess Phew... I began to wonder if there is a correlation between voltage to heating elements on soldering iron and degrees. Thanks for clearing that up.

@LawpickingLocksmith 6 месяцев назад

Lots of Elektroschrott! Did you know that Migros subsidiary Digitec throws away 500 tons of virtually brand new electronics that had been returned because of customers being too lazy to read the manuals.

@AndreasSpiess 6 месяцев назад

I did not know the fact and I do not believe it because I regularly purchase such products for a reduced price. They are usually opened, but still carry the full warranty.

@mcconkeyb 6 месяцев назад

The curve tracer reminds me of a Huntron Tracker that I used back in the 1980's. A quick google search show that Huntron Trackers still exist, but they are astronomically high in price (

@TheUnofficialMaker 6 месяцев назад

lol

@AndreasSpiess 6 месяцев назад

This idea is very old. The sometimes used 50/60Hz from mains to create the sine wave. Then, the device was very simple. I wanted to create my own. But when I saw this price, I thohgt, I can use my time in a better way...