Forum: Electrical
06-04-2013, 21:08
|
|
Replies: 19
Views: 3,636
Re: 2 19VDC laptop chargers in series
Do you mean you didn't measure output voltage of any kind from either charger, or they both output the same measured voltage?
I ask because some supplies may not engage their output until they've...
|
|
Forum: Career
07-04-2012, 19:47
|
|
Replies: 198
Views: 35,001
Re: What's your day job?
I'm a digital systems and software design engineer for a high voltage electronics company. I get to design digital controllers and software to run a variety of fun toys, from telecommunications...
|
|
Forum: Regional Competitions
18-03-2012, 22:40
|
|
Replies: 145
Views: 24,114
Re: 2012 New York City Regional
When we were competing I remember watching that balance thinking "Man, I'm not looking forward to playing against that...". Unfortunately, we were eliminated before that could happen.
Overall, it...
|
|
Forum: General Forum
05-03-2012, 22:26
|
|
Replies: 3
Views: 1,181
Re: Arduino with control system
That rule prohibits the Arduino from controlling the robot, not from reading sensors, or crunching numbers, or any number of useful things. I believe the Arduino would be covered under the custom...
|
|
Forum: Control System
03-03-2012, 10:25
|
|
Replies: 30
Views: 4,522
Re: Control System Design Contest Proposal
I see, but I'm still not convinced it would help enough to warrant the extra power source. And a COTS computing device doesn't necessarily have a power source, especially if you use a small embedded...
|
|
Forum: Electrical
03-03-2012, 01:35
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
I fully expect they don't have the same on-resistance, that is why I want to go for constant current loads, so we can measure the performance of the FETs, getting an empirical comparison of the 3 FET...
|
|
Forum: Control System
03-03-2012, 01:16
|
|
Replies: 30
Views: 4,522
Re: Control System Design Contest Proposal
Aha, I see, it makes sense, but I'm not sure it is really weight feasible to add a secondary power source like that, and I'm not sure what advantage it would really get you?
I think the current...
|
|
Forum: Electrical
03-03-2012, 01:00
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
I left out things like that and the control electronics for brevity, I was more referring to any obvious reasons that my scheme wouldn't work that I overlooked.
I think in this scheme, the...
|
|
Forum: Electrical
02-03-2012, 23:07
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
Excuse the crudity of this model, it's not to scale...
So, with the Jaguar in forward, and the Victor in reverse, in the on period for both, Node A will be at +12V, and Node C will be at 0V, flowing...
|
|
Forum: Electrical
02-03-2012, 21:34
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
I was aware of the Jaguars synchronous behavior, but I thought it wouldn't be a problem because, if I'm looking at my sketch correctly, when the off cycle occurs the terminals of the Jaguar reverse...
|
|
Forum: Control System
02-03-2012, 21:02
|
|
Replies: 30
Views: 4,522
Re: Control System Design Contest Proposal
Given the (very) real-time nature of what we're dealing with, UDP is probably best. I mean really, if the robot loses a packet, by the time it figures it out, the data is ancient history. I'd retain...
|
|
Forum: Electrical
02-03-2012, 20:49
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
Simple solution, run both at full blast and let the dynamic load regulate the current (this actually makes sense for a bunch of different simplicity reasons, but it also deprives us of the results of...
|
|
Forum: Control System
02-03-2012, 20:45
|
|
Replies: 30
Views: 4,522
Re: Control System Design Contest Proposal
I'm not sure, but I think there was a point in there about boot up time :P
I agree, Wi-Fi has too much overhead in general for this setup, including the time for the router and everything to start...
|
|
Forum: Electrical
02-03-2012, 20:35
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
The configuration I had in mind was a Jaguar running forward, bringing it's load node up high to +12V, and the Victor running reverse, bringing it's load node down to 0V, so that current flows:
In...
|
|
Forum: Electrical
02-03-2012, 19:34
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
EDIT: I'm removing the comments here in the interest of thread purity, I've reposted them in the new thread I made for control system design thoughts, linked below
I'm loving these suggestions, but...
|
|
Forum: Electrical
02-03-2012, 19:03
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
I'm a fan of this idea, I didn't mean to accidentally kick off a whole new topic in here :) to that end I've started a new thread here (http://www.chiefdelphi.com/forums/showthread.php?t=104114) to...
|
|
Forum: Control System
02-03-2012, 19:02
|
|
Replies: 30
Views: 4,522
Control System Design Contest Proposal
Background: In this thread (http://www.chiefdelphi.com/forums/showthread.php?t=103745) about Jaguars vs Victors I suggested (http://www.chiefdelphi.com/forums/showpost.php?p=1136497&postcount=65) a...
|
|
Forum: Electrical
02-03-2012, 13:50
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
According to our students, I'm also an official old guy (I don't get it) but I think I have a few good years left ;) I have had extensive experience with the IFI controllers and the current cRio...
|
|
Forum: General Forum
29-02-2012, 17:10
|
|
Replies: 2
Views: 891
Re: M1011 showing in black & white
Also make sure you're in a well lit area, in dim areas the color defaults to 'night vision' mode, which I believe makes use of infrared light to see in the dark.
Matt
|
|
Forum: Technical Discussion
28-02-2012, 23:54
|
|
Replies: 5
Views: 1,039
Re: Jaguar VBus Fault
We're going to need some more information:
What were you doing before and leading up to the fault?
What diagnostics have been done to identify the fault? (i.e. how do you know its a vbus fault and...
|
|
Forum: Electrical
28-02-2012, 22:10
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
There's really not much preventing that this year, there is a variety of ways to mount an embedded PC on the robot and have it use the cRio as a pretty pricey, FIRST controlled I/O expander, using an...
|
|
Forum: Electrical
25-02-2012, 22:23
|
|
Replies: 17
Views: 2,524
|
|
Forum: Electrical
25-02-2012, 21:52
|
|
Replies: 17
Views: 2,524
|
|
Forum: Electrical
25-02-2012, 21:25
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
As I stated earlier, I tend to agree that the Jaguars are not well suited to our uses. I find their over-current protection to be overly touchy, but not so touchy that I would dismiss repeated...
|
|
Forum: Electrical
24-02-2012, 20:26
|
|
Replies: 102
Views: 11,281
Re: Jaguars vs Victors
I'd just like to point out something about this situation.
First, let me be upfront and say I'm not the biggest fan of Jaguars, I prefer Victors because I find them simpler, smaller and generally...
|
Now, almost a day later, no one has begun interpreting, dissecting, attaching synonyms, re-interpreting or otherwise mangling Dave's wise words in an effort to find the hidden key to the game. I smell a conspiracy! - petek [more] 
