Home Made Ultra Sonic Detector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Home made Ultra Sonic Noise Detector using the FAR Circuits PC board, PVC piping, Detector from Mouser, and a plastic cabinet from Radio Shack. The detector is powered from a single 9 volt battery. The Detector instructions along with component information and FAR circuit’s PC board can be found at the link below .(I used the same link to build my own detector). The detector not only picks up power line arcing noises but it also picks up HV power line “Corona” noise and other sounds such as your feet crunching grass and leaves and other sounds you normally would not hear without the detector.

The Aluminum dish was part of a “WOK” set I found at a local hardware store. The shielded cables were from VCR/DVD player/recorders, cut to length. The plastic cabinet is from Radio Shack, headphones are cheap stereo phones with the 3.5mm socket stereo socket wired so both side of the phones hears the audio. The PVC piping and “T” section were obtained from local hardware store. The IC chip must be the TLC555 chip. A typical 555 chip will not work. The TLC555 IC chip is available from DigiKey under DigiKey part number 296-1857-5-ND for 84 cents each. The TLC555 IC chip is also available from Radio Shack under part number 2761718 for $3 each and is available on eBay ad #170881262435 pack of 5 for $2,49 plus $2 shipping. The first transducer listed in the parts list under part number 255-400ER18-RO and the second alternate transducer 255-400SR12-RO are not available from Mouser. However the first alternate part number, 255-400SR12  is available from Mouser under Mouser part number 255-400SR12P-ROX for $5.69 each.

http://www.farcircuits.net/w1rtc_notes1.pdf