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Forum Index : Microcontroller and PC projects : What the
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Plasmamac Guru  Joined: 31/01/2019 Location: GermanyPosts: 579 |
 Anyone know a cheaper Source? Thx Plasma |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
https://www.thebackshed.com/forum/ViewTopic.php?FID=16&TID=14714#184557 It is still available. Jim VK7JH MMedit |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
Demand pushes the price up. Elementary commerce.  In this chips case, it would seem they are in demand not just for our little CMM2, but they must use those chips in a few other things for the price to have gone up THAT much. That's quite shocking. I would ask WS if they have made a mistake with the price, but I expect they would reply and say they have not. I had one guy email me looking for the WS modules, and I happened to have five of them on the shelf I was not using so I sold him one of those, but he told me the price ranged from $120 to $200 per module now when he was looking, so......yeah.  He also told me that he ordered one for about $150, and then was emailed to say they did not have them in stock, the website was in error to say they DID have them, and he got a refund. That module used to sell for about $70 I think it was, when the chips were plentiful. I still have three or four WS modules, but I encourage you to contact Jim, as he made the first offer. I've also had to discontinue selling genuine HC12 modules on my website too, as I can't get them anymore even from the factory in China. There are a couple of reasons for this, but one of them is they can't get the MCU chip used on the module for the moment. Sound familiar? For my own HC12 uses, I have no other choice now but to buy them from AliExpress or eBay etc, and then test each and every one for technical compliance on the scanner radio and frequency counter, and then I will have to remove and replace the 30MHz crystal on any modules that fail that test. But it is the only way I can GET some modules anymore now. The clones basically use a reject crystal from what we know through research a few years ago, which puts them off frequency and gives them roughly 20% modulation instead of 100%, so they are deaf as a post even if you use clones in the same network, and the frequency error means they simply won't talk AT ALL to genuine ones. The clones CAN be made to work correctly, if you remove the crystal from the HC12 module and replace it with a known good one from a good parts source, but this all adds time and cost to everything that uses them. But what else can you do? (rhetorical) I certainly can't sell these as genuine ones, so I no longer offer them. Just ANOTHER casualty of the global silicon chip shortages. Smoke makes things work. When the smoke gets out, it stops! |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
Ah, good info Graeme. I was reluctant to use anything "HC", based on your experience but I grabbed a HC-05 from AE and it is rock solid. Just received 3 more to test. Wasn't sure if I just got lucky  Craig |
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| Amnesie Guru Joined: 30/06/2020 Location: GermanyPosts: 671 |
I know this is just my 2 cents.. but me, as an electrical engineer, it is often the best way for me to pick the platform with the lowest cost and broadest availability. And yes, this won't help to bring my fried CMM2 back either at this point, but even back then (before COVID etc) the STM chip wasn't hugely available in Germany, and the price was really really on the edge of what I was willing to pay. It has much more to offer when it comes to performance than the Raspberry Pico, but for my taste, there are too many downsides you have to consider; price and overall availability. I am really thankful that the PicoMite exists, even if it can not do all the fancy things the CMM2 can do. So thanks to ALL who made this possible! Sadly the CMM2 is a dead end for me. Edited 2022-04-19 06:23 by Amnesie |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7937 |
We are very lucky indeed that the Pico came along when it did and that Peter was willing to persevere with it in spite of the RDE being "a dog". :) It's turned out to be a little gem of a platform. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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Rickard5 Guru Joined: 31/03/2022 Location: United StatesPosts: 463 |
I've got a Bunch of ST STM-32 Nuclo Boards what can I do with them besides program them in C++, can I run MMBasic on any of these ?     I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4044 |
Zero or more may already run MMBasic. The rest... you'd have to port it... using C. John |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
I hear you, and I am also reluctant to use modules from AE or eBay, but at least there is a fix if they are identified as clones. I have a stock of genuine 30MHz crystals that I bought back when we tracked the problem with the clones to bad crystals, so at least I have a path I can follow if I get clones. If the clones are accurate clones, then they will work fine, but usually, fractions of a cent matter to the cloners, so that is why you end up with HC12's with reject crystals installed, as they would have been much cheaper then correct factory-pass crystals. I would NEVER buy HC12's from AE or eBay if I could get the genuine ones from the factory, but now that the bloody silicon-chip shortages are chewing into the supply of even these, I really have no other choice, as I use quite a few HC12's in my designs, so I HAVE to have them. If that means I HAVE to buy what are potentially clones, and then change the 30MHz crystal to make them operate correctly, then that is what I will have to do. But I also, am reluctant to do it. What other dirt-cheap, recycled or reject parts might the cloners have used? But these days, there is essentially no other choice. You have to buy what you can get, and then make it work from your end. *Large electronic sigh...* EDIT: Here is a link to the thread that tracks down the HC12 clone issue. It's quite a long read at nine pages of thread, but if anyone wants to read about that.... Edited 2022-04-19 10:18 by Grogster Smoke makes things work. When the smoke gets out, it stops! |
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| al18 Senior Member  Joined: 06/07/2019 Location: United StatesPosts: 228 |
I checked Newark.com (US) for stock of the STM32H743IIT6 and they are showing 0 stock with deliveries to begin 6/23/22! |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2640 |
As MMB4W is similar to CMM2 MMBasic an alternative may be a Celeron mini PC. I have seen them advertised on lie for $US 120. W10, 4GB ram, 64GB storage with room for a mSATA SSD. |
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| al18 Senior Member Joined: 06/07/2019 Location: United StatesPosts: 228 |
As great as MM 4W is, it will never beat a CMM2 because: 1. CMM2 boots in under 1 second. A PC takes minutes to boot. 2. A CMM2 will never require an OS update. My laptop, albeit an old one, was chugging away for more than an hour downloading W10 updates yesterday. W10 needs monthly updates! 3. A CMM2 will never need an Anti-Virus program. |
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