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englishian

Sep 2, 2017
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Hi New here I found this hand made device that looks like a speaker/announcer of some kind. Can anyone help me with what it is and how it works etc. The + - signs on the terminal block I put there but assume they are not correct. Thanks in advance. Ian IMG_1202.JPG
 

davenn

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Hi New here

hi ya Ian
welcome to EP :)

I found this hand made device

definitely doesn't look hand made .... all hi tec placing of surface mount devices

that looks like a speaker/announcer of some kind.

that looks nothing like that ;)

the chip in the middle ... TL852 is a sonar ranging receiver
http://www.ti.com/lit/ds/symlink/tl852.pdf

the datasheet I linked to will give you some ideas
The first thing you should always do is search for datasheets for devices on an unknown board ;)


what number is on that larger chip directly above it ?
I think it is one of the PIC family of micro-controller IC's


cheers
Dave
 

kellys_eye

Jun 25, 2010
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what number is on that larger chip directly above it ?
I think it is one of the PIC family of micro-controller IC's
16F87* (6 or 7 I'd guess)

I see the usual AC input (power supply circuitry) and a switching relay. If it is sonar related (and the TL852 seems to indicate this) it could be a simpe distance ranging alarm (parking?).
 

dorke

Jun 20, 2015
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Welcome to EP,
Without proper documentation of this board,I don't see how you can use it in anyway.
Where did it come from?

Like Dave said it is some kind of Sonar receiver board controlled by a PiC uC.
 

englishian

Sep 2, 2017
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hi ya Ian
welcome to EP :)



definitely doesn't look hand made .... all hi tec placing of surface mount devices



that looks nothing like that ;)

the chip in the middle ... TL852 is a sonar ranging receiver
http://www.ti.com/lit/ds/symlink/tl852.pdf

the datasheet I linked to will give you some ideas
The first thing you should always do is search for datasheets for devices on an unknown board ;)


what number is on that larger chip directly above it ?
I think it is one of the PIC family of micro-controller IC's


cheers
Dave
Thanks Dave When I said hand made I did not mean the Board. It is mounted to a Stainless Steel outlet cover with like a shroud covering whatever(looks like a speaker) the black and red leads connected to the board.
 

englishian

Sep 2, 2017
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16F87* (6 or 7 I'd guess)

I see the usual AC input (power supply circuitry) and a switching relay. If it is sonar related (and the TL852 seems to indicate this) it could be a simpe distance ranging alarm (parking?).
Can we tell me what AC power supply is needed? and which terminal to connect + -
 

englishian

Sep 2, 2017
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So I powered it up with 12v dc battery on terminals J1 and J2 and it makes a fast clicking sound when I pass something in front of it there is a click. I check the terminals J3, J4, J5 but do not see a voltage or any change. Any help of what to connect to those terminals too get a visual on what is happening. Thanks
 

CDRIVE

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The clicking is probably a relay closing "dry contacts".

Chris
 

dorke

Jun 20, 2015
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You have all you need in the link you posted above and in this one.
Full Specs,calibration procedure and operation.

Contacts J3-J4 are normally open,when the board detects an object J3-J4 will close(short).
 

englishian

Sep 2, 2017
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You have all you need in the link you posted above and in this one.
Full Specs,calibration procedure and operation.

Contacts J3-J4 are normally open,when the board detects an object J3-J4 will close(short).
There Should be power on J3 and J4 + and Com being negative when tested with meter and when something is detected turn power off?
 

dorke

Jun 20, 2015
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The contacts J3-J4 are actually non-dedicated("floating") relay(K1A) contacts.

You can connect an ohmmeter to them and check :
1. infinity when nothing detected .
2. short when object detected.

You can connect anything you like to them(within relay limits).
 

englishian

Sep 2, 2017
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The contacts J3-J4 are actually non-dedicated("floating") relay(K1A) contacts.

You can connect an ohmmeter to them and check :
1. infinity when nothing detected .
2. short when object detected.

You can connect anything you like to them(within relay limits).
I think I am missing something. So J3-J4 don't have a voltage I can use to say turn on a LED etc
 

kellys_eye

Jun 25, 2010
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J3 would be connect to a supply voltage (positive).

J4 would connect to your load (LED, alarm, whatever)

Supply negative would connect to the negative side of your load/
 

dorke

Jun 20, 2015
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I think I am missing something. So J3-J4 don't have a voltage I can use to say turn on a LED etc

Nothing is connected to J3 and J4.
You can connect anything you like DC,AC,Ground,whatever you need to one contact,
it will passed on to the other when the relay is energized(i.e-object detected).
That is as long as you don't go over the relay contacts limits(see below).

sona.jpg
 

CDRIVE

Hauling 10' pipe on a Trek Shift3
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It should be obvious by now that englishian doesn't understand the terminology "Dry Contacts" nor its proper and more descriptive term; "Non Dedicated Contacts".

Perhaps this will help.?

Chris
upload_2017-9-3_11-38-27.png
 

CDRIVE

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"I love it when a plan comes together"! ... Hannibal Smith :)

Chris
 
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