OT: How to build an electronic stethoscope. - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 05-22-2007, 08:04 PM Thread Starter
Can't Get Enough
 
jeeperjohn's Avatar
 
Join Date: Sep 1999
Location: The Plywood State.... Florida
Posts: 1,340
Thanks: 0
Thanked 0 Times in 0 Posts
 
OT: How to build an electronic stethoscope.

Here is what you will need:

  • 1 - "Whisper 2000" Hit garage sales or e-bay.
  • 1 - 20 amp battery clip
  • 10-15 feet - microphone cable
  • 1-2 inches - vacuum line that fits microphone cable
Now, lets rip your new toy apart.



Carefully pry the speaker grille looking part off the front.





Next mark the wires going to the microphone so you will be able to keep them straight (might not be necessary, but it won't hurt), cut the wires and carefully remove the mic. The mic is held in with some king of hot glue looking stuff.





Remove the battery compartment door and the three small screws in the back.




Remove the guts and set aside.





Put the two case halves back together and mark the side for a cutout (slightly smaller than the vacuum line) for the mic cable. Using a file and filling two matching semi circles will work better than drilling. If you drill the case you take the chance of breaking the posts that the screws go into. Don't ask how I know this.





Slip the vacuum line on the cable and strip the end of the cable. Separate the braid of the cable and twist.




Solder the cable to the mic connections on the circuit board noting the polarity.





Remove the cover from the clip and place on cable. Repeat the strip unbraid and twist routine. Solder the mic on (again noting polarity). Now hook a battery and the headphones up to the "Whisper 2000" and ensure it is still working. You did test it before you started modifying it didn't you?




If it works, reinstall it in the case and screw the back on.




Place the mic on the inside of the battery clip and stick in place with hot glue. Slide the cover over the mic.






Retest. If it works, you are done! I have not gave it a try on anything automotive, but if it works as good on a Jeep as it has with me playing with it it should work awesome.

Political Correctness - Because people can't handle the Truth
jeeperjohn is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 05-23-2007, 11:47 AM
 
Join Date: Nov 2000
Posts: 2,687
Thanks: 0
Thanked 0 Times in 0 Posts
 
A regular McGuyver!
TiminMb is offline  
post #3 of (permalink) Old 05-23-2007, 12:38 PM
 
Join Date: Apr 2007
Posts: 137
Thanks: 0
Thanked 0 Times in 0 Posts
 
Nice idea man. I need one of those, my Ram has an exhaust leak at the headers and I can't pinpoint it at all.
FiveSpeedWrangler is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome