Another simple DC protection


Posted on Feb 6, 2014

I used some schematics from Elliot sound products to help with this circuit. L-In and R-In come straight from the speaker terminals, +ve and -ve are +25 and -25 volts from the power supply. When the circuit detects DC, transistor 2 is turned on and the 25 volts is dropped across R4 and R5 to give 5 volts. This can then be used by the PIC multiprocessor.


Another simple DC protection
Click here to download the full size of the above Circuit.

There will be 2 x 12 volt relays with there coils in series fed from Rel+ and Rel-. These will be used to break the speaker output. Obviously, because a PIC is used here, any delay can be programmed into it and it can also flash the LED when the detection is sensed.





Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Guitar Reverb Effect
    60W Bass Amplifier and Preamp
    Fast Video Signal Amplitude Measurer Circuit
    Laser1 RoboBrick
    18 watt power amplifier using tle2141c
    synth mg
    Pipe Descaler
    fade fade out led circuit car interior lighting
    Simple Light Seeking Robot
    Simple RF Transmitter
    Simon18F



    Top