Yeah I saw that. No dimensions shown- are they specified elsewhere?
Hi Al. There's been some discussion about hole spacing right here in the thread.
Yeah I saw that. No dimensions shown- are they specified elsewhere?
Actually I'm looking for mechanical dimensions and the mounting hole positions.
People keep pointing to that one. When I open it there is an image of the board, however no numerical dimensions. Are the rest of you seeing something else?
Unfortunately I had to break off the 820ohm resistors. Can I replace these with 820ohm 3W resistors?
I just want to confirm my thought on this... I'm using a 7.2V LiPo that should be able to run the logic as well as fire the igniters for dual deploy. Will I need to connect the leads to all three battery connection points (B+/-, BattA+/-, and BattB+/-)?
By the way, I really enjoyed putting this together. It was a wonderful sound when I plugged it in for the first test and heard the beeps; confirming that I didn't mess it up too bad.
I assume you mean a 2S/7.4V LiPo. Yes, you would connect all three "+" leads together to the "+" (red) lead of your battery, and all three "-" leads to the "-" (black) lead of your battery. I would recommend two switches: One on the "+" side to the Eggtimer power, and a second one on the "+" side to the deployment channels' power. At the pad, you turn on the Eggtimer power, and when it starts to beep (before it does the self-test) you turn on the deployment power. Wait about 30 seconds until you get the "Ready" chirp/light, and you're good to go.
One thing that you do need to consider if you are using a single battery is the current draw of your igniters, and the current capacity (C rating) of your battery. If you're flying Q2G2s for your deployment, just about any LiPo pack that you are likely to find is going to be fine. If you are doing an airstart and have some kind of high current igniter (anything other than a dipped ematch), I would strongly recommend using a separate deployment battery.
Thanks Chris, that's exactly what I was thinking; just needed a sanity check. I am planning on using Q2G2s so the current should be relatively small.
They're #4, spaced .0825" x 3.725" (about 21mm x 95mm). The spacing is the same for both RevC and RevD boards.
Ok thanks. what size screws did you use to mount it?
First EggTimer assembled. Egads, those are tiny pads which are hard on those of us who now need reading glasses....
I still need to test it out; will do that later.
-Kevin
Even an unlighted magnifier helped a lot when I assembled my second one.
As I was soldering on the battery connectors one of the metal disks cam off. As I plugged the battery in it did not turn on. Is it because of the small little disk or because of something else?
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