- Jan 29, 2017
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Built my first Apogee up this afternoon, nice little kit to build!
To get the 1S you need for the Apogee, couldn't you also splice into the charging leads on the 2S battery and grab a 1S connection? This would eliminate the need for a 1S battery if you were really trying to save weight/space.The Mini Switch uses a 2S battery. The Apogee altimeter uses a 1S battery. So, the above special wiring is required to use the two together.
you could in theory take the power from a single cell of a multi cell battery through the balance port. You just have to be aware you are then intentionally unevenly discharging it.To get the 1S you need for the Apogee, couldn't you also splice into the charging leads on the 2S battery and grab a 1S connection? This would eliminate the need for a 1S battery if you were really trying to save weight/space.
Yes, but if you wire it like the diagram above, using the negative from the switch then use just the positive from the first cell (you just have to be careful not to take the positive from the second cell otherwise you will get full voltage) on the balance port to power the apogee it should work.The split voltage connection (the balance port) on a 2S battery is negative. Because the Mini Switch also breaks the negative connection, this method does not appear to be a viable option.
It's the other way round on balance plugs there is a negative attached to the negative of the first cell, then there is a positive attached to the positive side of each cell. (i have check this with the cells i have using a multimeter)There is no positive connection from only one (or the first) cell in a balance port connector. There is one positive wire, and one negative wire times the number of cells. So, in a 2S battery the balance port connector has 1 red (positive) wire and 2 black (negative) wires.
That said, a 2S battery is two batteries in series, so if you attach to both black wires, you will be attaching to only one cell (effectively a 1S battery) with one black wire being positive and the other black wire being negative. But, as mentioned above, you will be discharging LiPo cells at different rates (I’ll leave it to battery experts to weigh in on the risks associated with doing so).
Not everything that can be done should be done.
Well thank you for the diagram. I had thought of using it with the Mini Switch in some setups. This will prevent me from toasting the Apogee.For those of you that want to use the Mini Switch (WiFi) to turn on the Apogee altimeter, Cris of Eggtimer Rocketry was kind enough to provide a wiring diagram.
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The Mini Switch uses a 2S battery. The Apogee altimeter uses a 1S battery. So, the above special wiring is required to use the two together. If your altimeter has switch inputs (such as the Apogee screw switch), the inputs need to be shorted.
CAUTION: If you power the Apogee altimeter with a 2S battery, you WILL damage the Apogee altimeter.
Yes, but you need to be careful that the NEGATIVE sides are common. The Apogee draws so little current that I wouldn't worry about uneven discharge.you could in theory take the power from a single cell of a multi cell battery through the balance port. You just have to be aware you are then intentionally unevenly discharging it.
Mine too. I'm almost positive that I'm a trust fund baby... I'm not sure why it's taking so long to pay off. I guess I'll work all week and build this coming weekendHeeeyyy. Mine showed up today. Yippee.
Now all I gotta do is patch the roof, fix the lawnmower, finish cleaning up after two hurricanes and rebuild a lawnmower shed...then I can do some rocket stuff.
LOLAhh, just build the Apogees. It's too early for rain, the grass is pretty much not growing anymore, and there will probably be another hurricane anyway.
I'm with you. I don't want to see my natural disasters coming. I was in the office when our last medium earthquake (~6.5) hit the Seattle area. I remember thinking that I was glad that we were on the top floor, because we'd be on the top of the rubble heap. The building was fine in the end, but it sure swayed around a lot.Wow, I think I'll take my chances on the occasional, if unpredictable, earthquakes we have here...
I don't know if this is the "right" way to do it but I usually flip the Fluke to Ohms and measure across the LED. When it lights I have my polarity... or it flips into whatever dimension SMD parts live.This is an informational post for those Forum members who are assembling a Mini Switch (WiFi). One of the most difficult steps that I found was trying to identify the correct orientation of the LEDs. Although I found that my iPhone camera was able to magnify the LED enough to see the chamfered corner, I also observed that the chamfered corner is on the same end as the large window (within which you can see a small square); the small window is not the small square referred to in the instructions. You can see this large window with the naked eye, rather than trying to see the chamfered corner or small square with a loupe or other magnifier.
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Hope this is helpful.
I assembled mine last night as well. Started about 830 and finished around 930. Since I had my station out I went ahead and did both. I was near finished with the first one when I decided to look at instructions and realized the nut to the screw switch was pretty much the first thing to do. The second one I did the nut first, then "chips", then all the through-hole at once. Went together a lot more quickly. The only SMT part was the only part I dropped.I have a self imposed rule of "no soldering circuit boards after 9pm" (because I usually screw them up if I work that late) but I broke the rule and soldered the Eggtimer Apogee board and tested it last night starting at a little after 9 and finishing at 9:30-ish. I did the first test in the manual, I'll plug in the serial and check that this evening). It's an easy to assemble board. The single SMD is easy enough to install since it's a 1206 component. I used my Hakko to solder the nut for the switch to the board and the smallest tip I have for the Weller station (because that's what is in the iron) for everything else.
It's a nice, simple kit with good instructions. Nicely done Cris