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The I "C" Red Battle Royale LPF Contest

Lazerbeak

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I was thinking about it some more... I think a linear driver may actually be best for this kind of situation. Can still add all of those extra features, but I don't think that it will be necessary to use a switching driver when I can get ~75% efficiency with a linear driver. What's the Vf on these, anyway? About 2.5V, right?
Lazeerer said:
In Lazeerer's video where he pops the diode it looks like it goes from 2.1V/0.8A to about 4.5V/7.8A hopefully a datasheet will be released soon.

~ LB
 

Wolfman29

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They're just not controllable, don't come in very helpful packages... just so simplistic!

Disregard my first post here though. I came up with an even better design! >:D
 
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i would like to add on to my design. thinkgeek has things called quantum bits. they light up with vibration. glue these to the motors and get a light show :)
 
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For the project box I will be ordering a custom clear lid. This will make the quantum bits more visible. Thinking of adding a third motor an mirror for more advance patterns :)
 
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Put me down I am in.
I will make some thing cool. Need help finding driver that works to get max power.
 

Wolfman29

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Alright, I'm ready to post up my design.

I was inspired by Star Trek: The Next Generation. I figured I would make a real life phaser! I know it's been done before, but this will be complete with setting adjustment via two buttons (^ for increase and v for decrease in power) and will be encapsulated in a TNG phaser model (the one that Jayrob does is TOS). The driver for this one is the hardest part - making something with three buttons without any digital experience at all... it's tough! In fact, I'm not even going digital. I've figured out a neat way without any PICs to do this and it shouldn't be too big!
 

Lazerbeak

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Rick Trent said:
Put me down I am in.
I will make some thing cool. Need help finding driver that works to get max power.
Right on Mr. Trent :beer: I know you're one of the pioneers with these diodes so this is very cool :) Hmm... Well a dually with your current driver design would be cool too :thinking:

Ok, Wolfman29, I'm officially excited about your design now :D

cantthinkofone, you are a dark horse in the running and it just gets more interesting ;)

~ LB
 
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benmwv

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Just noticed this thread!

I'll accept the invitation to be on Issacs team ;) Might decide to do my own entry later though, IDK.

Wolf, the beauty of the amc7135 is its simpicity!

-Extremely low external part count
-Low dropout
-Simple wiring
-EASY package (why do you say its hard, it's not like its qfn or bga)
-Good heat disspation
-Heat spread over multiple ICs
-Highly scalable
-Easy to control by a uC, work just like a mosfet
 

Wolfman29

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I didn't know you could control them with a uC. But regardless, they don't really have amazing heat disspitating packages... and I don't like that they have to come in 350mA steps. I prefer packages with EPs. And they can't go over 6V or so, from what I can tell on the datasheet.

AND you can't pot control them! D:
 
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benmwv

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The 350ma steps and 6v limit are the downside. The heat dissipation isn't amazing, but they do have a small heatsink tab and since each one is only 350ma it works great.

The Vin pin functions as the "gate" to control them with.
 

Wolfman29

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So you can PWM them or you can actually control them like a voltage controlled resistor?
 

Lazerbeak

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benmwv said:
I'll accept the invitation to be on Issacs team Might decide to do my own entry later though, IDK.
You have time to decide benmwv, you guys can come up with a Team name if you want. I'll put you up with Issac for now :)

~ LB
 

benmwv

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I know for sure you can PWM them, but I have never tried forcing them into a linear region like a mosfet. I don't think it will work, probably just goes from full on to full off.

Thanks LB :p
 

Wolfman29

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Yeah. So they're really not as adaptable as I suspected. These are just crummy for 12x's. Ah well. I'm keeping my IC choice secret because it's the one I use in the BlitzLinear too ;)
 




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