LCR-T4 electronics components tester ATMega328 - Test and Review

@GUTEK@ wrote:

When the tester is turned on while holding down the button for a few seconds, the display contrast can be set. This probably was not written before.

Yes, that's how it works for me.

Comparison of tester TC1 element multimeter tester resistor 294.7? 295? resistor 67.2k? 67.5? 47.3? resistor 47.1? resistor 9.68M? 9.7M? resistor 385.6k? 382.7k? capacitor 610uF 596.9uF capacitor 6.22uF 6.32uF capacitor 666nF 640nF capacitor 462uF 381uF capacitor 1013nF 1019nF capacitor 961nF 958nF capacitor 90.6nF 91.99nF diode 0.423V 0.496V diode 0.446V 0.510V

@Stanley_P the tester on pins 1-2 shows a resistance of 0.7?, at 2-3 0.6?. GUTEK @@ @ I tried to set up the contrast but on this copy I did not succeed. Unless I'm doing something wrong, I hold the button and what happens next, a menu appears? @mozekam very good results for the tester and similar to the results obtained on the test copy. What was the uncertainty of measuring with a multimeter? How do you recognize these testers TC1, TC4, TC7, is there any indication on the display / PCB? The test copy is reported as MTESTER.

@TechEkspert on the disabled tester, press and hold the button until the contrast indicator appears. Each subsequent pressing causes a change of +1 value.

In the described model it does not work, apparently another firmware. The only difference is that it turns on without backlight and starts the test.

TechEkspert wrote:

How do you recognize these testers TC1, TC4, TC7, is there any indication on the display / PCB?

I recognize my T7 after the inscription "T7" on the casing Does he report himself, I did not even look at it carefully. For sure at the start, it shows the battery voltage. If there is interest, I can undress him and take photos of the guts. But this is next week, because he was at work. As for others, especially those DIYs without housing - I do not know. We were looking for a complete "ready", because no one at work would play sculpting, some modding, etc. In the Chinese there is a lot of it, there are also versions for self-assembly (plate and elements separately). As mentioned by one of the foreheads, Aliexpress or similar are now a mine of electronic gadgets-ideas. Example of search results with the keywords "transistor diode tester": https://en.aliexpress.com/wholesale?catId=0&i...0701011119&SearchText=transistor+diode+tester

I used the SIGLENT SHS810 meter for comparison.

Good results, mostly in the area of SHS810 uncertainty. The results of the voltage drop on the diodes likewise the differences probably result from another measuring current used by the tester and multimeters. In practice, the minor inaccuracies of the tester when used for testing electronic components do not interfere with anything.

1. It is really good to secure the display, especially the ribbon connecting the display to the board, it is delicate and the display easily falls out. 2. There is no 9V battery in the set

And I am so different from another barrel when colleague gulson came here. Would it be possible to add options in the "gadget store" to track the topic or let me know about new products. Something that will inform me about the appearance of a new product.

Maybe then, how the amount of gadgets will be greater than the number of interested. The issue of 2-3 years.

It seems that there are 10 left, we will see what properties of these testers will be discovered in a team. If you have not used such devices yet, I suspect that you will definitely find it useful when working with electronics.

It is a pity that you can only 1 gadget for 3 months. I recently bought this USB tester because I have to check the charger / USB adapters. Now I know why my brother's charger loads phones faster (output voltage up to 5.4V). I just fit in with the release of 1241 points. Is this exactly the same tester? https://www.banggood.com/LCR-T4-12864LCD-ESR-...-Transistor-Tester-p-978992.html?rmmds=search Only the distribution of paths on the tile differs if you trust the picture.

Novile wrote:

I do not provide links because the rules prohibit prices

Provide links, I absolve you, I would like to see who sells in Poland for PLN 30, because I saw a minimum of PLN 60 plus shipping.

Novile wrote:

I do not think that these are large amounts and you have the stock right away.

Or they have goods for PLN 100 from a Polish company. Or they have goods for points with a free shipment. The most important is that everyone has a choice In July there will be a new ESP32 with Bluetooth. And when it comes to testers, it's time to prepare points for August!

Novile wrote:

Tester without housing PLN 24.99 with shipment PLN 44.98

On ebay they are after 22PLN. Sure, with 25pln in Poland is not enough and it is not worth bothering to wait for a shipment from China. But with us, the value of the shipment is often higher than the module, partly due to the fact that the seller is trying to earn a shipment and treats it as a profit margin. However, the elements themselves are expensive in relation to the devices assembled, you can see the labor of the Chinese girl is of low value in their country. The modules are bought for "store". So I can wait and a month. Free shipment is a good thing. If in Poland, find a way for free, or almost free shipments, this would certainly stimulate trade. Remember that the gadget is something that distinguishes the electrode, but it is not the essence of this portal. A nice addition, for giving, helping, etc. Will be 4 or 2 a year, it is less important.

So cheap testers, yes, they are on Allegro. However, you have to read that:

Quote:

By choosing to participate in our offer, you grant us power of attorney to order the goods and to transfer the payment to a foreign seller to the producer on your behalf.

So they will be sent from China anyway and the "moment" will wait for it.

Novile wrote:

Novil

Then look at these links and check where the delivery is from and what the deadline is I will not mention the invoice, because it would probably be a problem, but I do not know for sure. Your first delivery date is 7-45 days, but you must be aware that 7 days is a spring story and the seller knows it. I will not mention complaints, Allegro is a way of suffering, doomed to failure, and yes, for your own satisfaction you can put "I do not recommend" - good and it is from the point of the buyer. Complaints on aliexpress, eBay are definitely better! The Chinese handles us better than the countryman.

All of these cheap offers apply to shipments from China. It is not a business for a buyer who must pay a tribute to a Polish seller, but in fact an intermediary who will buy goods in a Chinese store on behalf of the buyer.

My tester is already going to me with elektroda.pl, and HERE you can buy a housing for it for $ 2.40 ~ 9 PLN (airmail included) HERE you can buy a set: tester + housing with a battery pack for ~ 38 PLN (air shipment included)

piterek-23 wrote:

you can buy a housing for it for $ 2.40 ~ PLN 9

I will not build the tester myself, but I can build it, it will be "own contribution" Gulson can announce a contest for the most interesting housing made by itself.

I have this tester for 2 weeks. It is with housing - measurement of frequency - frequency generator - checking of IR remote controls - temperature and humidity measurement - the rest was mentioned.Cena-65.72PLN-DIY version. I've seen here comparison of indications with the meter for 2500PLN. As for me amateur is great. it takes a couple of hours for me - 4 hours. Free delivery. I recommend it to everyone.

I also have one. I bought from a Chinese, I waited 2 weeks for a shipment. Housing is done and can not be done, and the tester I use mainly for checking Mosfets, or working. It goes quickly and painlessly. I also recommend each gouge.

MiernikZKauflanda wrote:

I will sooner come from a well-known Chinese portal than I get so many points ...

@MiernikZKauflanda 1200pkt is not so much especially that you can accelerate the number of points: - writing your finished construction in DIY to + 300pts (4 constructions) - writing your design during construction in DIY to + 200 points (6 constructions) - writing DIY construction from abroad portal / page is + 50 points (24 descriptions) - writing your own Article to + 40pts - settlement news to + 30 points - tutorial videos + 20pts - information about event + 10 points

@ pawelr98 it's a different version. There are no holes for quartz. There were several variations on LCR-T4. T7 also does not differ much in terms of construction. And all based on this: https://www.mikrocontroller.net/svnbrowser/transistortester/ " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > https://www.mikrocontroller.net/svnbrowser/transistortester/ The version of gadgets is judging by the photos exactly the same version as developed on the forum: https://www.elektroda.pl/rtvforum/topic3200555.html " target="_blank" class="postlink inline" title="" > https://www.elektroda.pl/rtvforum/topic3200555.html

MiernikZKauflanda wrote:

I know that you can earn points in this way, but you can not abuse this "gift from the administration". I might as well put a few power supplies on the basis of a well-known company in a row to get points for that tester ...

It is not about "scoring points", only earning points for sensible activities. You have cleared the bottom of the shop and good, it would be nice to see the response in the forum, when the gadgets will start to reach people, how much can such a shipment, week / two?

It came to me on Monday, even 7 days. I ordered a USB tester, I am waiting for my phone to fall and I am still testing the battery capacity as many as mAhs.

vodiczka wrote:

Gulson can announce a contest for the most interesting housing made by itself.

I have a hunk like this, but I am looking for a box to civilize it more. Initially I have selected such, only a bit expensive: https://www.aliexpress.com/item/5pcs-lot-Whol...on-box-plastic-black-plastic-abs-enclosure-80 /2039872455.html

I have a question about the ribbon connecting the PCB and display - is it hard to accidentally damage it? And can you get it somewhere?