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Gadget Freak

Gadget Freak Case #192: The Ultimate Wireless Volume Control

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armorris
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Platinum
Spontaneous volume changes
armorris   7/15/2016 2:32:24 PM
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One builder, using his volume control in a commercial setting had trouble from spontaneous volume changes. I made a change that fixed the problem, but slowed down the response of the volume control. While developing another Gadget Freak project, I revisited the remote control system, using a new oscilloscope and saw something I missed before. Using this new information, I rewrote my receiver decoder software to greatly improve speed and noise immunity.

If you don't have the means to program a PIC yourself, give me your mailing address and the "channel" your remote is on, and I will send you a PIC programmed with the updated software. If your "channel" is something other than A B C or D, then I will need to know which jumpers are cut in the transmitter or the discarded receiver unit.  If you can program a PIC yourself, tell me so and I will email you the updated software.

armorris
User Rank
Platinum
3-pack remotes
armorris   6/18/2016 1:10:48 PM
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I recently discovered that the Chinese factory that makes these remote controls also makes a 3-pack version with a 6-button transmitter and 3 receivers. They are completely compatible with the units I've been using. I'm currently working with a person who wants to use one of the extra channels to turn his system on and off and another channel to switch signal inputs. I have already written code to decode the other transmitter channels. Please email me if you want further information.

Jimmy Weaver
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Iron
Re: A PCB is available
Jimmy Weaver   2/12/2016 9:35:17 AM
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Great build very interested in it would love to know how to get a PCB for this thanks alot 

 

Jimmy

 

PS  ever think about doing the same project but be able to control it from a Blue Tooth app on a phone or tablet?

 

email is weaverjim1@gmail.com

 

Thanks

armorris
User Rank
Platinum
A PCB is available
armorris   9/27/2014 12:23:10 PM
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One of my readers has designed a PCB (printed circuit board) for my gadget. He designed it to accomodate multiple configurations. That means what you do with the extra op-amp. For example, he uses it as a third channel for his high-end subwoofer. If you want a PCB, email me and I'll hook you up to him. I'm not making anything off of this project. I just want people to enjoy my gadget.

armorris
User Rank
Platinum
Using a different remote control system
armorris   2/4/2014 7:36:41 AM
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A reader wanted to use a different remote control system with greater range for outdoor use. I redesigned the pot controller chip to accomodate two momentary inputs (UP and DN). I also rewrote the remote receiver code to produce two momentary outputs, originally to test the pot controller. My email address is in the article.  Please email me if you would like a copy of this code or preprogrammed chips.

armorris
User Rank
Platinum
Re: Enclosure
armorris   10/11/2012 4:34:22 PM
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Also, if you're not going to drive a low impedance load like headphones, you can delete transistors Q1 and Q2. I would leave R7 in place as the capacitors C1, C2, C3 and C4 could make U4 unstable.

armorris
User Rank
Platinum
Re: Enclosure
armorris   10/11/2012 3:48:55 PM
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The volume control has an auxiliary output for an optional audio switch to turn a subwoofer or audio system on and off with the incoming signal. If you are not going to use that, you can delete R2, R3, R8, D1 and D2. Add a wire in place of the diodes (between U4 pins 1 and 2).

dgrant
User Rank
Iron
Re: Enclosure
dgrant   10/11/2012 3:06:35 PM
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Aha! Sorry I didn't see the extended text beneath the youtube video.

armorris
User Rank
Platinum
Re: Enclosure
armorris   10/11/2012 3:04:15 PM
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No, It's not a Hammond enclosure. It's Radio Shack 270-1803. The link I sent you earlier has the part numbers and sources of parts not available at Allied. Since Allied sponsors this blog, they don't like people to mention the sources of parts they don't sell. That's why I sent you to my YouTube page.

dgrant
User Rank
Iron
Enclosure
dgrant   10/11/2012 2:39:52 PM
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1 saves
Is that a Hammond enclosure?

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