| Electronics > Projects, Designs, and Technical Stuff |
| Batteroo testing |
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| IanB:
--- Quote from: EEVblog on December 23, 2016, 05:35:00 am ---Batteroo have already admitted on their product sheet that it's not recommended with torches with DC-DC converters, why?, because they are active loads! --- End quote --- Not all LED lamps have good regulation, for example, this one: Ultimate Survival Technologies 10-Day 6-AA Lantern It takes 3 or 6 AAs in a 3s2p arrangement. I bought it for blackouts/emergencies based on the good reviews, but when I tested it I found it has absolutely no regulation at all. The current consumption increases exponentially with increasing battery voltage, about twice as much at 1.5 V as at 1.1 V, and rising ever more rapidly if you go above 1.5 V. I guess this works OK with alkaline batteries, but I think the design would be much better if it had regulation to maintain a constant, stable brightness when the voltage increases above something like 1.2 V. Anyway, to the point: I would guess the Batteroo would work against this lamp as boosting the input voltage will drain the batteries much quicker due to the voltage/current load characteristic. |
| samgab:
I know there are dozens of ways to do a reed switch counter circuit, using 4026 IC, ATmega8 circuit, PIC16F84 circuit, some kind of Arduino circuit, using 7 segment displays etc, but for anyone out there who is thinking of setting up a simple counter circuit for any kind of testing, where you want to keep it as simple as possible and don't want to make a little circuit for it, here's a nice cheap and easy solution using a cheap-as-chips pedometer and a reed switch: http://www.trainelectronics.com/artcles/pedometer/index.htm https://goo.gl/juvaWu The advantage of using a reed switch and magnet is that there is no physical contact to trigger the switch, so it doesn't affect the device under test. Go nuts people! |
| razvanme:
Keeping a constant voltage to a passive load should be the same thing? If I keep a constant 1.5V over a 15 \$\Omega\$ load, it means I am keeping a constant 100mA over the load. So the batteroo is a lot worse at doing that, in any passive load. Am I missing something? It seems it's the exact thing they warn about just worse. Also, they might get away with "murder" since they do not mention anything about extra battery life, they were very careful with the wording. --- Quote ---"Don't waste time on new batteries to get great performance, just slip on a Batteroo from the start and your device will perform at it's best until all the energy is used up" --- End quote --- It's what I expected, the train will run full speed until the end, it seems even that is a fail. |
| samgab:
Does anyone else here remember user 5ky here on the forum https://www.eevblog.com/forum/profile/?u=110170 , he has already got the same Garmin unit that was used in batteroo's infamous rigged test, and has done some pretty good initial testing. He has also ordered batteroos, but he hasn't been active on the forum here for a year or so. I hope we see some more from him when his batteroos arrive! |
| 6581:
--- Quote from: samgab on December 23, 2016, 06:19:40 am ---The advantage of using a reed switch and magnet is that there is no physical contact to trigger the switch, so it doesn't affect the device under test. Go nuts people! --- End quote --- As long as the magnet on the DUT is kept away from motor and batteroos inductor - could affect results if too near. (I guess the effect to motor would cancel out though.) |
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