Julian's Postbag: #51 - Banggood Special
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- Опубликовано: 13 сен 2024
- Lovely items from Banggood:
SKU292538 1200W 20A DC Converter Boost Step-up Power Supply Module IN 8-60V OUT 12-83V
bit.ly/1SzhJYv
SKU230069 ESCAM Brick QD900 WIFI 1080P P2P Cloud IP IR Waterproof Security Camera
bit.ly/1Ljtxsq
SKU275045 GM328A Transistor Tester Graphic Wave Signal LCRRLCPWMESR Meter Inductance
bit.ly/1PxD5aS
SKU159250 2Pcs DIY Electronic Intercom Kit Walkie Talkie Interphone Learning Kit
bit.ly/1HViKnX
Some items in this video were supplied at zero cost.
The Walkie Talikes I'm really looking forward to see/hear more about.
Those things takes me back to my childhood.
Greetings from "Germary", glad you enjoy your "electronci" DIY kit.
It's "electronig" DIY kit. Return to Germary. That is how many Chinese people would "actury" pronounce it.
This video made me become aware that there are PCB-style blade fuse holders! Thanks!
When I was a young fellow, I took a summer job working for a fly by night jack of all trades. We did house painting, building destruction and construction, that sort of thing. He was long on work and short on pay, in fact we usually had to get our dads involved to get a check out of the skinflint, but I did manage to save up a few bucks. Much of my money went for smokes, cause it was so cool to smoke back then, but I did set aside enough to buy a pair of Midland walky talky's and man we had fun with those, my best buddy and I used them all over the place, we were still young enough to play soldier and stuff like that (the child labor laws were rather scant back then.) So those toys were great. However being an electronics nut, it wasn't long before I had them apart, trying to make them do stuff that they shouldn't do, and eventually breaking first one, then the other. Ah but they were fun while they lasted.
Iceo is the collector-emitter leakage current with the base open circuit and
Ices is the collector-emitter leakage current with the base shorted to the emitter.
Iceo will generally be much larger than Ices because the collector-base leakage current flows back into the base and is amplified by the gain of the transistor so to turn a bipolar transistor off thoroughly you need to put a low impedance across the base-emitter.
+number 33 Thank you - a concise explanation.
Can't wait to see you put the DC booster thru it's paces IT'S A MONSTER !!!
+Juan Lanza Actually, it's a dud.
Heads-up on that boost converter - the China ones seem to, without exception, be input limited. I.e, the 20 A is going to be the maximum primary current it can handle. Which makes sense, since its maximum voltage is rated at 60 V, giving a maximum power of 1,2 kW. At 12 V, it's only rated to do a measly 240 W.
It'll do a bit more than 240 if you can keep it cool. I was able to push it to nearly 30 amps (maximum my powersupply could handle)
Also, they've revised the design since this video. It now comes with the connectors for the input side, a low voltage cut off adjustment pot, and instead of multiple small mosfets, it uses a single fet on the input, 2 standard size fets AND one giant fet on the output. It actually does VERY well at high loads in my testing, and the inductor coil doesn't ring like the 600w model does. It also has two 15amp fuses vs 2 20amp fuses
The cheap black plastic bag always makes me happy when i get it:)
+slavko321 Very true! :)
+slavko321 i always get my china stuff in grey bags. . .
Thanks for the demo of the multi tester. I went to eBay and did a search and immediately bang good's listing came up. I was reading about it and when I saw it had capacitor testing (measuring also the capacitors loss) as well as inductor/ inductance testing I was sold. $22 AUD with free shipping seemed pretty good even if it only lasts a year or so.
The up to 2MHz square wave generating function will also be great for the odd experiment :)
That boost converter in your hands has a terrible flaw. If you power it up with say 19 V and then turn it off after the output voltage reaches the set limit (say 83 volts for example) with no load connected, it will cause the red led (LED1, I believe which I think is a low power indicator) to come on from that point on. That is, the next time you power it back up the unit becomes useless - it only supplies a voltage equal to the line voltage at its inputs regardless of what the voltage adjustment trimmer is set to.
See if your unit suffers from this flaw and I will tell you how to fix it.
When are we going to see the walkie talkie build , takes me back too, I built one from a magazine article never could get it to work though
+MrBuck295 Hmm, not sure if the walkie talkies are getting more votes than the boost converter :)
+Julian Ilett Pity that ,I was so looking forward to it ,what ever you post next I`ll be sure to watch Thanks
Interesting items Julian, please keep up the great work. For the component tester, ICE0 is a test for collector emitter current with the base open cct. Likewise ICEs is the same but the base emitter are shorted. It appears the resolution for these measurements cannot show the leakage current.
Also take care with the 1200W boost converters. I thought the current limit would protect it but i blew the transistors 1st time!
Great post bag, looking fwd to seeing what the 1200w booster can do!
Thank u for doing the post bag! I've learned and bought a lot of cool stuff just because of your videos! Thank you ;))
Good stuff. please keep on making these videos and following up with projects .
I'm not sure I would trust that boost converter with anything important or expensive. I've seen some of these cheaper converters surge way past the set voltage on start up and destroy electronics. I would also like to see how well these perform at both low and high current draw. Temperature, ripple, noise, etc. I don't trust a lot of these companies' claims of power output and 1200W is a lot. Don't burn down your house! ;-P
Those component testers seem to be quite annoying with the auto power off "feature". Why they couldn't make it an option jumper or setting to extend the time out time I don't know. Most people won't be using these in the field but actually indoors where AC power is available so why not just put on a power jack and let it stay on continuous (until you unplug it or switch it) or at least have a 5 minute timer or something. Very annoying if you are trying to write the data down or whatever.
Some of the component testers can be updated. I purchased one on ebay but am not sure about doing the update. I was wondering if you might consider doing a video showing the significance of the output numbers and call outs given by it. Just learning these things and don't understand these.
Thanks
I think the transistor. Checker is a good idea, and its already put together,can you get a clear case made for it.also do they have a already put together. Apiator checker too
I love your postbag series! Thanks for sharing :)
Yeah I read that as "E-Scam".
And of course you don't stick a screwdriver into the ferrite core as a) it could break the core and b) the metal screwdriver would affect the tuning. You want a non conductive core twiddler (technical term).
How about a diidler or a fiddler
Good stuff! By the way, noting that you uploaded this on Nov 26, 2015, the reason why you saw "unsupported plugin" on Chrome is due to NPAPI plugin, which Chrome no longer supported as of September 2015. Firefox and Internet Explorer still supports those technologies, however.
I bought one of these, works really well for the price I paid for it.
Great Video and thank you. I bought the upgraded version of the booster(heat sink & Fan $29.00) and a bunch of Charging batteries. Banggood is not so cheap but offers many products.
Intercom no longer available.
Those converters are bs. They only have different power rated transistors but price diffrence is really significant.
Hi Julian I love the tackiness of the 49Mhz radios - I had a pair about 30 years ago! Have you thought anymore about the question I asked about 2.4Ghz 2 way radio?
Great Postbag, could you use the tester for the devices the converter to determine what they are ?
+T Komoski You mean while they're still in circuit? Worth a try I guess.
+Julian Ilett Hope you use it while you build those walkie talkies
+Subigirl Forester Yeah I really should! I got caught out with resistor markings on the DSO138 oscilloscope kit.
+Julian Ilett I really Can't wait till you upload that 👍💖
+Julian Ilett You said on the side on the PCB Testers Points Can you test in circuit with that
tester ? those devices on that other board.
oo ip camera, good timing! hoping to see an outdoor, wireless, panning one, plus fuller review of the component tester too, push it to its limits!
Could you also wire a microphone along with the speaker? I wonder if it would get damaged if you tried to play sound through it?
I wonder if there is a line that goes high when transmitting, with a transistor to turn on an external microphone and turns off the speaker from being used as a microphone?
I'm just waiting to see what's inside the camera and what falls out.
That rattle is the lens shutter I think.
thats a lovely tester
Would love to hear those walkie-talkies.
+CircleofMadness Me too. I'm thinking the mylar loudspeakers may work better as microphones than the paper types. So we may be pleasantly surprised.
That ZIF socket says "TFXTDOL" on it instead of "TEXTOOL" - Interesting... what about that patent number 3500745? Huh. Apparently that's not a ZIF socket. What you have is an adjustable mounting for an ink fountain.
If anyone buys one of those circuit testers. Don't forget to drain your capacitors before testing. I found out the hard way. The guy was going to send me a new processor for it but he ended up sending me a replacement unit.
Great video as usual. I have read that the ESCAM might try and "phone home", do you see any evidence of this? It says it's waterproof, do you think it would survive outside and the connectors (power/wireless etc). Thanks
First thing to do with the component tester: add a real power switch. The one I have (similar type but not as many functions as the banggood one) slowly drains the battery. Second thing to do: build a case out of plywood.
+superdau The auto power down and boot time would drive me insane. Handy little gadget all the same.
+superdau I just put mine on stand offs on pieces of scrap. Good enough.
+Rob B Some you can adjust the power down in the menu. But there are like a zillion versions of these and the firmware in all of them varies. AFAIK the graphical ones are not user updatable either. They don't take very long to test a component. Especially considering you do not have to observe any polarity at all connecting components to them.
+Julian Ilett I have a review of the 1200w version in case you were curious about it. They've revised the design since this video however.
I wonder if that buck converter would boost a lead acid 12 V up to needed 13.8 V for a 50 watt transceiver?
Germary is new country in Europe ;), with me, once banggood people sent on right street address of UK but mentioning wrong country - Italy. Luckily it reached in UK :).
We are captive, and are simply happy with any input. Erm, uh can we bring an IoT factor into the voting, and work with an ESP8266 again You could monitor the output of the panels, it would be fun!. :-) Anyway at ~$20 for a Boost Converter, you must know what you are leaning towards. Ordered one of the "Testers" after seeing Banggood version, nice! Regards C
I think Germary invaded Polard once.
The first thing you have to do when you see ANY power adapter is tear it apart and see if it doesn't explode when plugged in!!!
hellow, mr Julian, what are your thoughts about zero pi ? magpi did some interesting announcement this this...... may be you want to cover the incident with december issue ?
another thing, when you build the walky talky, can you please probe it with oscilloscope and explain us how it works ?
Not sure if you have seen it already but rctestflight recently made a video on driving 10 100w LEDs together, you might be able to beat him with that boost converter.
+DaXcopter Yeah, I'm hoping to drive twelve 100W LEDs - 6 per converter maybe...
+DaXcopter and, WOW, 2 million views in 7 days - now that's what I call viral.
Also I have a question about ordering from China have you had any problem getting your stuff from China.
1200 Watt boost converter. Yeah... right! Gotta love the Chinese hype! That would either fail and blow the fuses or become a flaming mess if you tried to push 1200 Watts through it. That heat sink and inductor are way undersized for 1200 Watts.
Did that red Transistor tester show the Autobots logo while starting up?
Gotta love banggood :)
how many 100 watt leds will that boost converter handle
Isn't Germary somewhere near Peeland?
+Polish Tech Support he's trying to be funny, if you read carefully (and listen to the video,) it said Germary not germany, so he said close to peeland not poland... perhaps the baby humour doesn't "translate," properly
ABritInNY Wow you were actually able to work that out, did you have help?
did you install a BMS into your bike yet?
Adding my voice to those that want to see the boost converter first, for 100w LED testing.
Weird that they used a static ip address for that camera. Not every router uses the 192.168.1.x range as default.
+Luc Peeters quite true, but it does seem to be the most common. Kind of a pain for anyone who isn't though I guess
+Luc Peeters You can't really put a web server on a dynamic IP address. I'm not really sure how the P2P system works yet - it may be that this works without needing to know the camera's IP address - and if the camera is uploading only (FTP for example) it could be set to DHCP. Also, there may be a utility on the CD to find the camera and alter its settings. Lots to play with here :)
+Colin Keevil. I have a couple of Linksys, Cisco cameras here and a Foscam. None of them were set to a fixed IP (range). Normally you can use the DNS name of the thing depending of your network config to get access to your camera if you don't know the IP, but then it has to be in the same range and have the dns server address set correctly..
I had to help loads of people who are not network savvy with these fixed IP delivered things. It's also a bit of a nuisance to put your pc on a fixed ip and then change the config.(especially on the phone)
+Julian Ilett Looking fwd to the unscrewing thing part maybe a couple of nice screenshots of what kind of image it really produces. I have seen a couple of HD cams which look worse than 320x240 as a matter of speech and are useless in case of an event.
Well the fixed ip. They could put it as DHCP first and then you should be able to set it to static ip after you configured it. Would make it a lot easier for a lot of people.
All my fixed ip 'server' stuff here is set in between 192.168.1.5 to 192.168.1.99 and my DHCP server in the router hands out addresses above that.
Hi Julian, I have had one of the QD900 cameras for about 3 weeks. I could not get the IE software to do motion record, the manual record works OK in short bursts but I left it on over night (8pm till 8am) and the 20 gig file would not play back ? The CMS software on the disk is not much better. However after a bit of a search I found some open source s/w called Ispy (www.ispyconnect.com) and it works quite well. If you manage to get the included s/w to record on motion detect please do let us know how with another of you great videos.
+Jon Davies 20 gig file? That's mad. The camera really should have a mechanism for splitting the video into separate files
+Julian Ilett One of the s/w included is called CMS basically its the same as the IE interface and the manual record does split up the recording in to manageable chunks. The down side is that it records in a strange format that will only play with the included player not something like VLC or WMP.
Nice :) I order the same Boost converter :)
Bit of an old video but i have just bought the 1200W PSU and typically arrived wrapped in a 2"
square of bubble wrap that didnt protect it. The output terminals got rather deformed and smashed
that little capacitor. Any idea on its capacity? I cannot find anything written on it.
Its marked C15. Any tips? Thanks.
Playing a bit more with this and mine will not go below 2.7Amps? Is it me or are the specs
wrong for this item? I tried 2 55W car bulbs in series on the output. Set the voltage anywhere
between 13.8 and 24V, Pulling the current down it just wont go below 2.7Amps, where the
voltage drops to slightly lower than the battery input voltage.
Must be me right? Thanks.
two 55w car bulbs in series will draw about 2.3amps at 12v, of course you can't go below your input voltage, but it looks like it's working correctly. You're gonna have to try testing it with a much lower load than 55w car bulbs. (which are pulling about 27w of power at 12v)
You're gonna have to go down to the 10w range before you start being able to limit the current below that 2.7amps your seeing.
It sounds like you're actually lowering the output to the point that it's shutting off the boost circuit effectively.
You should update the firmware on them, its all open source and what not. It's maintained by someone in Germany. The Fish software is terrible.
+PoLoMoTo2534 The last I checked the open source project only supports a 2x24 text display. So that rules out upgrading any of the graphical models.
You must've checked a long time ago then, support for the graphical displays has been around for a while. The fish8840 firmware is a stripped down version of the complete graphical firmware.
PoLoMoTo2534
I would not call a few months a long time ago.
I mean I don't know what you want me to tell you I bought and upgraded mine around six months ago now, and it wasn't a new update when I did it. You must have been looking in the wrong place.
PoLoMoTo2534
Perhaps.
Why on earth would walkie talkies be illegal??
For transmitting on all the wrong frequencies, accidentally or otherwise.
Or in this case, because en.wikipedia.org/wiki/CB_radio_in_the_United_Kingdom#History
Tehee, security camera's with default "admin" "admin".
Does Bangood pay you to put this video up?
+flahr1 Nope. But they do supply the items at no cost. Also I choose the products I review - these are all my choices.
+Julian Ilett Appreciate your openness. Thanks
+Julian Ilett Now having said that, I would like your opinion on something, Julian. I was prepared to order from the banggood website a couple of days ago. I had second thoughts. :) I couldn't do anything except think about that Chinese order being so far away if the products were junk. In your opinion... is the banggood site worth spending your hard earned labor units on if they don't give you products to test? :) Should I splurge for the purchase from banggood or not?
+chop98 I live in Mexico. My experience has been that the products arrive about a month after ordering. The packaging is sparse but adequate. The components (mostly led drivers and lights) are of very good quality. The prices are good. I recommend this company.
weebray
Thank you, Man. I'm waiting for a first small shipment to arrive. Looking forward to inspecting the goodies. :)
Julian,
The camera has a value of about $50.
All you did was play around in an apparently random manner.
What I think most viewers would prefer is a reasonabaly thorough evaluation showing strengths & weaknesses.
Noone wants to spend that amount & get a poorly designed or poor performance device
Talk about retro, I bid on 3 CB radios on www.stealitback.com and got the lot for 4 bucks plus 15 shipping, not bad for a rather nice radioshack 40 channel mobile unit for my RV, as well as another 40 channel Cobra hand held CB with rubber ducky antenna, and a very retro looking 3 channel hand held CB with the classic expendable antenna that pulls WAAAAAAAAAAAY out, it looks every part the walkie talkie with padding around the speaker and mouthpiece, all mounted in silver plastic with just channel 14 installed. She takes the old crystals for different frequencies but I don't think I will ever install any more even though they are still available on Ebay, I probably will never turn that one on. Both the hand-held take AA batteries, handfuls I think 8 or 9, I just plugged in a 12 volt power pack to them to try them out and they work fantastically. I even sat down and converted 50 feet of old TV Cable into a 103 inch doublet antenna which I intend to mount on the next sunny day when I can get to the lumber yard for some PVC Piping to finish my project.
Useless trivia alert:
Antenna uses an SMA connector.
Always enjoy your video's! BUT when it comes to reading Induction's, these are useless!!
Most of the time it will report 'unknown'
Unless you have some other device in mind; it looks like I'll have to buy a PEAK.
watch out for china connections lol
the software is always outa date lol
15 frames is to low 25 frames is better regards pa3dee
i not has orden anythink last 6 month at banggoods, because last 7 parts what has orden no come to home newer. shit, and i has used and orden bangood last 4 year ewery month and no problems now has problems i no orden again anythink.
AssCam