Don't tempt meMrCrowley wrote:The MiniBoy V2?
I think those specs refer to what it can measure, not what it can survive.A small data logger GPS I found even gave specs like:
Max velocity: 550m/s
Max acceleration: 4Gs
So I wonder if an epoxy coating will even be enough to protect it.
hectmarr wrote:You have to make many weapons, because this field is long and short life
I'm guessing it would experience a bit more than that if you drop itMrCrowley wrote:I thought 4G might be a bit low for that but then again, how often do you experience more than 4Gs?
that's several orders of magnitude less than the g-force it woud experience in the barrel, this thing has to be *really* strong. Thing of the poor sods who have to design electronics for something like the Excalibur travelling at Mach 2+...hectmarr wrote:You have to make many weapons, because this field is long and short life
Yeah but I assume it's more for measuring how much g-force you experienced in a car accelerating to a particular speed in a set time; in which case 4g is quite a lot.jackssmirkingrevenge wrote:I'm guessing it would experience a bit more than that if you drop itMrCrowley wrote:I thought 4G might be a bit low for that but then again, how often do you experience more than 4Gs?jackssmirkingrevenge wrote:I think those specs refer to what it can measure, not what it can survive.
I have a schematic made for a transmitter and receiver that makes use of the TXC1 and RXB1 that MrC referred to earlier in this post if some wants to build it.jackssmirkingrevenge wrote:
Dewey, how would you feel about pouring epoxy on a board like that?
"Terrible"
From where I'm standing though, the RF tracker seems like a better idea. It's cheaper than GPS unit and simcard, and you get two tags so can track two projectiles. I also imagine that the tag electronics are much more compact and simple.
I agree completely!
Could you qualify that opinion in terms of how it would negatively affect components?dewey-1 wrote:Dewey, how would you feel about pouring epoxy on a board like that?
"Terrible"
hectmarr wrote:You have to make many weapons, because this field is long and short life
[youtube][/youtube]I'm guessing it would experience a bit more than that if you drop it
The oil filled PC is not under any high g-forces either.jackssmirkingrevenge wrote:Could you qualify that opinion in terms of how it would negatively affect components?dewey-1 wrote:Dewey, how would you feel about pouring epoxy on a board like that?
"Terrible"
I would understand that for example an antenna would be affected, or a component with exposed contacts like the sim-card holder, but what about sealed components?
Ifthis can work dipped in oil, then surely epoxy would not destroy it either right? I understand how it would create an insulating layer that would retain heat, but is this an issue on such a scale?
Yeah, I was just using it as an example of a coated board functioning.dewey-1 wrote:The oil filled PC is not under any high g-forces either.
The only "connectors" that should be involved are the battery contacts and those don't need to be potted if positioned well.Heat will not be a problem on a RF tracker or tag.
The epoxy will not effect (sic) the components as such other than wicking into the contact areas of connectors
I see your point, my idea though is to have the tag in a cast unit, then have this unit (cylindrical, travelling in the projectile body tube) packed between thick layers of memory foam to cushion against firing and impact forces - again pretty much what I had drawn here:I just think a casting with a less brittle property like a polyurethane base or silicone base would be better.
Think of a hammer hitting a super ball versus a hammer hitting a marble is the closest analogy I can come up with.
hectmarr wrote:You have to make many weapons, because this field is long and short life
affect!!he epoxy will not effect the components as such other than wicking into the contact areas of connectors.
I told you months ago to choose this design oh come on, your posts are frequently riddled with spelling mistakes and we don't complainPOLAND_SPUD wrote:it's affect not effect
I always insisted on it, then LeMaudit stepped in with his fantastic creation... but now I have my own machinesI told you months ago to choose this design
hectmarr wrote:You have to make many weapons, because this field is long and short life
Hey I am a pole - it's not surprising that I am often drunkoh come on, your posts are frequently riddled with spelling mistakes and we don't complain
Exactly how I see it, epoxy provides the structural integrity to keep the parts on the board together, but the board itself is then protected by thick layers of spongy material.The epoxy is only there to reduce strain on solder connections and movement between components, actual impact force reduction would be done by the foam
hectmarr wrote:You have to make many weapons, because this field is long and short life
That is OK, PS can not even edit the the quote without a spelling error!POLAND_SPUD wrote:affect!!he epoxy will not effect the components as such other than wicking into the contact areas of connectors.
it's affect not effect
