| Electronics > Projects, Designs, and Technical Stuff |
| Batteroo testing |
| << < (5/127) > >> |
| razvanme:
@FrankBuss Part of the reason I'm sending in pairs, is to test them combined, I'm curios how it behaves when you have two batteries in series / parallel, do you get 3V constantly until both are dead, do they share the current in parallel. Also you have an oscilloscope, so you can check the switching frequency. Check the standby current before you start pushing them to the limits :). After you test them (and possibly blow one up), check the other components, I guess the big component is an inductor, what are the others and what values. |
| EEVblog:
--- Quote from: FrankBuss on December 17, 2016, 04:48:45 pm ---I'm preparing the tests, cleaning and ordering the gear on my workbench a bit. And I bought some fresh AAA batteries, from different vendors, because the typical end user test would be important as well. Here is Dave's spreadsheet for entering test results: https://docs.google.com/spreadsheets/d/18K9c2YAT0d0QABGYGpzItbvDcgfAQCRUtloEzzfXADU/edit?usp=sharing --- End quote --- Yes, I encourage everyone to follow that procedure for product testing (no test gear needed) and send me the results to dave@eevblog.com and I'll add them to the spreadsheet. |
| FrankBuss:
--- Quote from: razvanme on December 17, 2016, 05:43:10 pm --- --- Quote from: FrankBuss on December 17, 2016, 04:48:45 pm ---I'm preparing the tests, cleaning and ordering the gear on my workbench a bit. And I bought some fresh AAA batteries, from different vendors, because the typical end user test would be important as well. Here is Dave's spreadsheet for entering test results: https://docs.google.com/spreadsheets/d/18K9c2YAT0d0QABGYGpzItbvDcgfAQCRUtloEzzfXADU/edit?usp=sharing --- End quote --- I think step 2 and 7 combined might mess with the results, the dead batteries regenerate (I understand they don't recharge), even 1 minute of on time with a low load (1-2ma) might give batteriser a lead. I don't think it's fair to wait for them to regenerate. --- End quote --- I don't think this will result in much difference. And it is always good to use best-case scenarios, because if they performs badly even then, you can be sure that Batteroo is not good for the tested product. To check exactly when the MP3 player I'm using for the first test stops playing, I created a simple peak detector with very slow fallback: I'm not good with analog electronics, so first I forgot R5 and R6 and the voltage at the plus input was slowly running towards -5 V, but I saw this in the logging and could fix it. This is how the peak output looks like, compared to the amplified input after the first op-amp: This is the script I'm using to record the data (it is really easy with the RPi_LogNut framework), and here are the first minutes of the log (both voltages are measured every 10 seconds precisely). As you can see, the peak level slowly faded away, until I hot-fixed it by adding the two resistors :) But looks good so far: The battery voltage is measured with two wires in the battery compartment, between the battery and the contacts. This should not influence Batteroo later in any way. Thanks Dave for your latest video, I might need to replace the ADG608 with an ADG609, so that I can switch two signals. In this setup the battery minus is directly connected to the multimeter minus, but later when I switch to the shunt for the characteristics curve etc., I need to switch both multimeter inputs, to avoid the voltage drop on the wires for higher currents. I hope logging works for hours, never tried this before. When it is done, the battery will have some time until the Batteroo arrives to regenerate. |
| ez24:
FrankBuss can you post a picture of your MP3 player, it looks like it could be different than https://www.aliexpress.com/item/High-Quality-8GB-USB-2-0-Flash-Drive-LCD-Mini-MP3-Music-Player-with-FM-Radio/32644511571.html?spm=2114.01010208.3.1.ulkwFJ&ws_ab_test=searchweb0_0,searchweb201602_2_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10054_10033_10059_10032_10099_10078_10079_10077_427_10103_10073_10102_10096_10052_10050_10051-10033_10077,searchweb201603_3&btsid=46859591-b34f-4d2a-9a43-551af6a52f12 I have used these for years and have collected a dozen so far. It was the first thing I thought of when I learned about the Bat (sorry about the link, I do not know how to shorten it) |
| FrankBuss:
--- Quote from: ez24 on December 18, 2016, 11:17:46 pm ---FrankBuss can you post a picture of your MP3 player --- End quote --- It is a really old one, from 2004, didn't use it anymore since the iPhone came out. I think it is this: http://www.ciao.de/Pro2_Mp3_Player_256_MB__1205082 But not the first picture, the other 3 pictures. Can't remember the price, but some people in the comments wrote that it was 80 EUR, with 256 MB flash and not so good sound quality, but this was normal for this time. I think there is a firmware message for a short time when I turn it on, will try to take a picture when the battery is empty. |
| Navigation |
| Message Index |
| Next page |
| Previous page |