Jump to content
Electronics-Lab.com Community

Search the Community

Showing results for tags 'induction'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Electronics Forums
    • Projects Q/A
    • Datasheet/Parts requests
    • Electronic Projects Design/Ideas
    • Power Electronics
    • Service Manuals
    • Theory articles
    • Electronics chit chat
    • Microelectronics
    • Electronic Resources
  • Related to Electronics
    • Spice Simulation - PCB design
    • Inventive/New Ideas
    • Mechanical constructions/Hardware
    • Sell/Buy electronics - Job offer/requests
    • Components trade
    • High Voltage Stuff
    • Electronic Gadgets
  • General
    • Announcements
    • Feedback/Comments
    • General
  • Salvage Area

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


Website URL


Yahoo


Skype


Location


Interests

Found 1 result

  1. Hello. I made this circuit below: http://www.diy-electronic-projects.com/p270-Everything-that-moves-ALARM The circuit does not appear to be working properly, and I would like to get it working. To be honest with you, I never heard of a human body detector using eddy currents. The first image shows the pulses on the gate of the mosfet. They appear to be low duty cycle(around 15-20%). The other images show the pulses received by the smaller coil(5"/100T/26ga enamel wire) placed in the center of the 24ga speaker wire/5 foot diameter (5T) TX loop. The circuit can be set, but you cannot get it to trigger unless you actually touch/move the RX coil.The RX signal on the scope is more or less sinusoidal. Operating voltage is around 13.5vdc. Hopefully you can assist me. There is a 1000uF electrolytic capacitor across the power rail. Pins 4/8 on the cmos 555 and pin #14 of the 4093 are connected together to the + rail. Thanks,Doug
×
  • Create New...