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Re: Doing the impossible with H-bridge?

 by BushWhacker ¦  Sun Jun 02, 2013 9:19 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Doing the impossible with H-bridge? ¦  Replies: 6 ¦  Views: 748

Thanks guys.... I always learn more when I screw something up and get some pointers here to straighten it out!!

Re: Doing the impossible with H-bridge?

 by BushWhacker ¦  Sat Jun 01, 2013 10:23 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Doing the impossible with H-bridge? ¦  Replies: 6 ¦  Views: 748

Maybe I'm finally learning something about electronics... or at least maybe some of the help so many of you guys have given me has at least got me thinking better -- I still don't know why my original circuit didn't work as expected; but I have learned enough that I decided to try putting a couple o...

Re: Doing the impossible with H-bridge?

 by BushWhacker ¦  Sat Jun 01, 2013 10:11 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Doing the impossible with H-bridge? ¦  Replies: 6 ¦  Views: 748

I appreciate that, jremington, but I did check the Data Sheet "Function Table"... all it tells me is that for each driver, if the A and EN pins are both high, the output (Y) will be high, if A is low, output should be low, and if EN is low then Y is off and in high impedence. My point is in the conf...

Doing the impossible with H-bridge?

 by BushWhacker ¦  Sat Jun 01, 2013 9:08 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Doing the impossible with H-bridge? ¦  Replies: 6 ¦  Views: 748

Okay, Gonna make myself look stoooopid here, I'm sure. Just got the SN754410 H-bridge today, eagerly popped it into a breadboard to check it out. I built the most basic of circuits: 1,2EN are run to the +5V rail; Vcc1 (pin 16) goes to +5V rail; Vcc2 (pin 8 ) gets +3V. Pins 4,5,12,13 all go to Gnd. 1...

Re: How would you make a gun cam??

 by BushWhacker ¦  Sat Apr 20, 2013 6:20 am ¦  Forum: SparkFun Product Questions ¦  Topic: How would you make a gun cam?? ¦  Replies: 12 ¦  Views: 1477

A really good point, macegr..... and something I hadn't considered. Obviously I'm not ready to get started yet, still got some thinking/planning to do.

Re: How would you make a gun cam??

 by BushWhacker ¦  Fri Apr 19, 2013 7:52 am ¦  Forum: SparkFun Product Questions ¦  Topic: How would you make a gun cam?? ¦  Replies: 12 ¦  Views: 1477

I appreciate that, Skimask -- your suggestion is pretty much what I think I'm going to have to do, since I don't know how to make a camera work -- and I'm sure it would be much less expensive to do it this way. But there's always the little part of me that would rather learn something new and build ...

How would you make a gun cam??

 by BushWhacker ¦  Fri Apr 19, 2013 7:04 am ¦  Forum: SparkFun Product Questions ¦  Topic: How would you make a gun cam?? ¦  Replies: 12 ¦  Views: 1477

I have a concept for my next project, but I fear it my be a bit beyond my current abilities ... but that's never stopped me before. Fear not, what I refer to as a gun cam has no criminal or evil inclinations. What I'm picturing is a tube a 1-2 feet long with a small camera in the end -- this tube is...

Re: Good Switch, Good Motor, bad combination!

 by BushWhacker ¦  Mon Jan 14, 2013 6:50 am ¦  Forum: SparkFun Product Questions ¦  Topic: Good Switch, Good Motor, bad combination! ¦  Replies: 8 ¦  Views: 796

Mee_n_Mac.... now you've hit on it.... I has hoping to use the switch box from the car because obviously it has some mechanism inside that times the movement of the motor and controls how far the window goes up or down. I has hoping that I could use that to control how far out (and back in) the moto...

Re: Good Switch, Good Motor, bad combination!

 by BushWhacker ¦  Mon Jan 14, 2013 6:22 am ¦  Forum: SparkFun Product Questions ¦  Topic: Good Switch, Good Motor, bad combination! ¦  Replies: 8 ¦  Views: 796

I apologize, I should have been more detailed.... the section of the circuit that I'm dealing with is just the switch and motor, nothing in between. The switch is a "black box" to me, it's the driver side window control, so the box has several switches encased in a single unit (switches for the moto...

Good Switch, Good Motor, bad combination!

 by BushWhacker ¦  Sun Jan 13, 2013 10:24 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Good Switch, Good Motor, bad combination! ¦  Replies: 8 ¦  Views: 796

Well, I'm at a loss.... I'm trying to re-purpose an automobile power window motor into a new project. I pulled the switch and motor out of a junked car, but I'm not quite sure what's going on. I tested the switch unit in the vehicle before removing it (stuck a 12 v car battery in, and measured the v...

Re: How do they do that??? Electronic Ear Muffs

 by BushWhacker ¦  Fri Oct 19, 2012 8:57 am ¦  Forum: SparkFun Product Questions ¦  Topic: How do they do that??? Electronic Ear Muffs ¦  Replies: 15 ¦  Views: 2034

Mee_n_Mac~ Thanks again. Now your comments are exactly on point, and you've sparked some ideas for me (sorry about the confusion from my original post). Just BTW - the mic already in use IS clipped to the shooter's shirt/vest close to his mouth. I 'tuned' the mic circuit during the design process so...

Re: How do they do that??? Electronic Ear Muffs

 by BushWhacker ¦  Fri Oct 19, 2012 6:27 am ¦  Forum: SparkFun Product Questions ¦  Topic: How do they do that??? Electronic Ear Muffs ¦  Replies: 15 ¦  Views: 2034

Thanks everyone... particularly waltr - every question I have, you seem to be there for me. mee_n _mac is in fact right on with the technology I was considering; but the problem is that these circuits reduce the volume of a shot, but don't eliminate it. Reducing the volume is great for protection, b...

Re: How do they do that??? Electronic Ear Muffs

 by BushWhacker ¦  Wed Oct 17, 2012 3:16 pm ¦  Forum: SparkFun Product Questions ¦  Topic: How do they do that??? Electronic Ear Muffs ¦  Replies: 15 ¦  Views: 2034

Sorry about that.... googled Audacity then downloaded it -- looks like a good thing to have at my disposal for more than just this one project.

Re: How do they do that??? Electronic Ear Muffs

 by BushWhacker ¦  Wed Oct 17, 2012 3:07 pm ¦  Forum: SparkFun Product Questions ¦  Topic: How do they do that??? Electronic Ear Muffs ¦  Replies: 15 ¦  Views: 2034

Forgive my "newbie-ness", but I'm assuming Audacity is some sort of software? I'll definitely get the recording ... that's a great idea, I don't know how I would duplicate the shots in my workroom without alarming the neighbors! lol. The other solution is a limiter circuit that reduces the gain on t...

Re: How do they do that??? Electronic Ear Muffs

 by BushWhacker ¦  Wed Oct 17, 2012 2:28 pm ¦  Forum: SparkFun Product Questions ¦  Topic: How do they do that??? Electronic Ear Muffs ¦  Replies: 15 ¦  Views: 2034

Thanks fll-freak! Low pass filter... that sounds like a great place to start. I do know that the circuit I put together has a "high pass filter", but honestly I "borrowed" the circuit on-line and adapted it to my use, so I wasn't exactly certain what was being filtered. I just knew that I needed the...