BUSHNELL radar gun outputs

[ts1]

Hello friends,

I have a BUSHNELL radar gun here and I need to know how to get the outputs from its circuit before entering the display circuit. I mean as a voltage or bits not displayed.

That's in order to feed them to a controller.

From inside its circuit is:
PROGRESS INSTRUMENTS INC 38005-045-01 REV D FILTER BRD


THANK YOU VERY MUCH!!

 

[davenn]

hi welcome to the forums

is this a speed detector ? if si it is likely to have a Gunn oscillator transmitter in one waveguide cavity on either 10GHz or 24GHz and receiver mixer diode either along the same cavity or in a separate one beside the Gunn cavity

some sharp pics would help any circuit info etc else were are all just guessing as to its current mode of operation

Dave

 

[ts1]

Hi davenn and thank you very much
I am really in need for help so thanks again

Yes it is a speed detector
I am attaching 2 photos, one of the main crt. and the other for the LED screen. the thing is I want to feed the output to a microcontroller but I cant determine.

Thank you!

 

[(*steve*)]

The ability to hack is limited only by the availability of information. Construction methods are almost irrelevant unless you're talking about stuff integrated onto a single chip.

If you can identify the main components and get data on them, all you need is experience and skills.

 

[Renos Papapaschos]

Hi davenn and thank you very much
I am really in need for help so thanks again

Yes it is a speed detector
I am attaching 2 photos, one of the main crt. and the other for the LED screen. the thing is I want to feed the output to a microcontroller but I cant determine.

Thank you!View attachment 3589

View attachment 3590

Hello from Athens Greece.
I have a problem with the circuit board that you have in this port.
The component 08 on the top left is blown and I am trying to find it.
I thing that is a voltage regulator with the letter on top 21 2c .
can you held me identify this.
Thank you very much for your help.

 

[73's de Edd]

Sir Renos . . . .


Look around the board for the different components designations assignments.
You definitely see the system u/p assigned as being a U4 and additionly look at its s ... l... o... o... o ... o ... w clock crystal.
Its Mama must have been a digital wristwatch ?

Seems like one very minor I.C at board top, is seen to be U1 and below the u/p is being U2 and U3, and over at mid board bottom is U5
BUT . . . .getting on over to and up to your deeee-vice . . . . . it is being assigned Q8 . . . . . so if it looks , smells and waddles like a duck . . .it REALLY must be a transistor.
If being a 3 terminal regulator one would expect an U8 designation on it, along with the ever present input and output electroltyics RIGHT at its input and output

This must be a transistor and for that time frame of the board development of this unit I suspect a bipolar unit.
Your DVM used in Diode test mode will reveal all.

OR checking the left terminal as a base, the center one as the collector and with it having BOTH a bottom center terninal connection AND the top heat sink tab and the final 3rd terminal would be the emitter.
Is your assumption / analysis of it, as having an C-E short or opened internal emitter bond .
If shorted, pull the transistor and see of its collector is being fed with + polarity voltage if it happens to be an NPN unit. Opposite polarities if it is PNP.

HOWEVER . . . . . if you find NO continuity/short between the center tab and the heat sink tab and the parts nearby proximity to that 5 pin ribbon cable and is /has an INPUTTING gigahertz range signal.
The "21" parts marking code *** has one of its assignments as being a designation of the item below.
Its being a transistor built MMIC

BUT . . . . . . . I certainly believe that Mini-circuits wouldd be the only sourcing of this unit. with THEIR normal name marking on the unit, no coded marking.

marking codes ***
https://www.sphere.bc.ca/download/smd-codebook.pdf



https://www.minicircuits.com/pdfs/GALI-21+.pdf


Thatssssssssit . . . . .

73's de Edd . . . . .


Madness absolutely takes its toll . . . . so, please have exact change.