Uniden Smart Cord Schematic

InsipidMonkey

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kwthom

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Continuing the effort that @dbranger94 started with this, I *think* I can make that schematic work from post #1 on a legacy Escort cord. It'll be a *little* different, but a couple of hours staring at the schematic and the PWB layout makes for a six or seven step process that I have outlined. Intermediate-level electronics assembly skills will be highly suggested.
 

Up All Night

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kwthom

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No, it's a rework of the circuit to match what another thread states is the schematic from the Uniden SmartCord.

EDIT: Um, something's not quite right...more work to do.
 
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Jujitsu

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dbranger94, Outstanding info! Thanks very much for taking the time to share the knowledge.

I just got the $190 Black Friday version of R1 from Best Buy and will be retrofitting my old Escort 8500 coiled smart cord for use with the Uniden which comes with simple cord w/o mute button in this cheaper version.
 

GTO_04

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You mentioned an LM393 chip in this response. Where exactly is the LM393 being used? Obviously not in the Uniden Smartcord (as shown in post #1 of this thread) - part of the Hard wire Kit?
The LM393 is a voltage comparator. Through resistor voltage dividers you can set the voltage at which it goes high or low. Just consider it a voltage detector.

GTO_04
 
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SquirrelMaster

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First of all, gotta set the mood with a nice, soothing Himalayan Salt Lamp.
111617

And here is the exact circuitry in the detector that drives the external LED on the smart cord:

111618


PA5 on the main MCU is configured as an Open Drain Output and subsequently either floats or pulls down the line to ground that normally sits pulled up to 3.3v with a 1k resistor. 2 diodes added for protection I believe
 
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UnidenSupport

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I sent them this...

APR 26, 2018 | 03:57PM CDT
Original message
Charles wrote:

I ordered the RDA-HDWKT on March 8th 2018 from BestRadarDetectors.net and today, when I pushed the mute button on it(probably only the 3rd or 4th time I've done so), it broke and no longer presses. For a short time the button was stuck in the on position, causing the R3 to put everything into the Mute Memory. I was able to make it stop but the button no longer works.

What do I need to do for a warranty replacement?

And here is the email I received from a support person "Ryan"...

APR 26, 2018 | 04:19PM CDT
Ryan replied:

Good afternoon, Charles,

We’re very sorry to hear that this has happened. Unfortunately Uniden has no warranty on accessories that are sold separately. We apologize for any inconveniences this may cause. I would recommend contacting BestRadarDetectors.com about this issue. Please feel free to contact us if you have any further questions or concerns.

Thank you for Choosing Uniden!
Ryan
Uniden Tech Support
That would have been right around when he started with us. He is no longer with us, but he gave you bad information. I'll go ahead an PM you about this.
 
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crabu2

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I've got one that the UBS port broke loose on. How do I take it apart to fix it? Does the silver ring screw off, or is it glued? If glued, whats the best way to get it apart? Any additional info would be great!!

Thanks!
 

AllAboutJake

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Sorry to bump an old thread but I had a question if anyone knows, and this seems like a relevant place to ask.

The V1 mute circuit seems to use something like a 100k current limiting resistor when pulling the MUTE pin to ground. Basically the external button is a weak pull-down.

Basically my question is, would a V1 mute button circuit work for Uniden? It's possible that the Uniden radar detector has a stronger internal pull-up and a 100k pull down would not be enough to trigger a mute. In such case the V1 circuit would not work as it requires a strong pull-down (short to ground)
 

SquirrelMaster

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Sorry to bump an old thread but I had a question if anyone knows, and this seems like a relevant place to ask.

The V1 mute circuit seems to use something like a 100k current limiting resistor when pulling the MUTE pin to ground. Basically the external button is a weak pull-down.

Basically my question is, would a V1 mute button circuit work for Uniden? It's possible that the Uniden radar detector has a stronger internal pull-up and a 100k pull down would not be enough to trigger a mute. In such case the V1 circuit would not work as it requires a strong pull-down (short to ground)
The mute button schematic has a 47k pull up and a buffer transistor. I do not think the 100k v1 mute circuit would work with it
 

AllAboutJake

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The mute button schematic has a 47k pull up and a buffer transistor. I do not think the 100k v1 mute circuit would work with it
Thanks @SquirrelMaster. I might be looking at the wrong schematics then, because the ones at the top of this thread show the mute switch as basically a switch and a 1nF capacitor (probably for debounce).
 

SquirrelMaster

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Thanks @SquirrelMaster. I might be looking at the wrong schematics then, because the ones at the top of this thread show the mute switch as basically a switch and a 1nF capacitor (probably for debounce).
You're seeing it correctly. The schematic I mentioned is internal to the r3. You basically need the mute wire to be as close as possible to a ground short. A 100k to ground wouldn't work when the internal pull up is 47k
 

butterman

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Thanks for documenting what you've found! I'm competent enough to to build a circuit and read diagrams but enough to reverse engineering PCBs yet. I just rigged up an rj14 with a mute button this afterno

114559
114558
 

ScvttH

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Thanks for documenting what you've found! I'm competent enough to to build a circuit and read diagrams but enough to reverse engineering PCBs yet. I just rigged up an rj14 with a mute button this afterno

View attachment 114559View attachment 114558

Verrrrrrrrrry Cool. I really like the integration, and I should start brushing up on wiring and boards to try to do this...I've messed around with breadboards but thats it lmao
 

Up All Night

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I sent this to a forum member and didn’t get a response, so I’m tossing it out here, not going to chance blowing up my R LOL.
First to respond with PM, gets the package.
“If you send me your address, I’ll send you the ecort remotes I was playing with and a uniden remote that died. Don’t feel like playing with it. Bought a new one for $15...
You can fix, modify, use, sell or give them away as you see fit.
Posted from my iPhone using the RDF Mobile App!
 

bilagain

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I just rigged up an rj14 with a mute button this afterno

114559.png
114558.png
Like the install... Wondering what happens when you hit the trunk release as you're going for the Mute button... Speed brake?
 

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