Search results

  1. E

    Finishing touches on motion alarm

    Im not limiting the voltage at all at the coil. It responded well to 15 volts so i went with it. I just adjusted the delay and sensitivity from all the way clockwise to center turn on the PIR. Now it does trigger at all. Since i built this from scratch there is nothing to reference for...
  2. E

    Finishing touches on motion alarm

    Ive tried my best to draw a proper schematic but somehow it still looks messy. Anyways this is how it is currently after the 3 resistors added. Instead of taking a minute to trigger, now it triggers as soon as i give it power. Im at a loss. Its getting frustrating and its about to be put on the...
  3. E

    Finishing touches on motion alarm

    Im going to add a 1k resistor between the pir out and base. Ive heard 2 other suggestions for resistors. Between the base pin and the emitter pin and also between pir output and ground. Can someone please explain how either of those placements would help? I feel like doing either of these would...
  4. E

    Finishing touches on motion alarm

    This makes sense. I will add the resistors. As far as the transistor being wired right...i have the collector going to the 86 pin on the relay. The emitter is wired directly to the PS and the base is going to the output on the PIR...correct?
  5. E

    Finishing touches on motion alarm

    So it seems the motion alarm is triggered by nothing now. It warms up and gets set off instantly. Ive been searching and ive run out of ideas. I dont know whats causing it. Its like the PIR is on a countdown.Everytime (about 90 seconds after switching on) it goes off and resetting the relay has...
  6. E

    12v receptacle

    Well maybe one day someone will create a more attractive looking receptacle. Just thought id bring it up
  7. E

    Finishing touches on motion alarm

    Here ya go. Just add the reset between the transistor and relay and thats my design [mod note: full image added to post]
  8. E

    Finishing touches on motion alarm

    Sorry this phone doesnt like uploading pictures i guess. I know i know its a terribly drawn schematic but this is the one i have on file. The reset button i mentioned is a NC button and is placed between the transistor and 86 peg on the relay. If its too bad ill revise the schematic later and...
  9. E

    Finishing touches on motion alarm

    The motion alarm i built is having issues. I turn it on and after probably 90 seconds it triggers automatically. The alarm doesnt turn off when i hit my reset button. What is going on with this thing?
  10. E

    12v receptacle

    This is really just a discussion at this point. If i find a good one i may use it on one of my upcoming renewable energy projects
  11. E

    12v receptacle

    This is why i mentioned one prong being positioned 90 degrees relative to the other
  12. E

    12v receptacle

    I feel like if something was manufactured with one prong positioned 90° relative to the other that would prevent misconnection. But in this instance the wires would be connected strait to the prongs
  13. E

    12v receptacle

    Ill just jump right to the question. Is there a good reason no one uses a standard double prong receptacle with 12v applications? The only standard receptacle that i know is used for 12v is a cigarette lighter in a car. Or atleast it looks like one. Havent we moved on to a more standard looking...
  14. E

    Where to start

    Thank you.
  15. E

    Where to start

    Im learning C. Just teaching yourself seems so daunting. I just want to be able to program the uC to do something cool or useful. But i know i have to start simple. Any resources that could help me with C? I would appreciate it.
  16. E

    Finishing touches on motion alarm

    whoops heres the rest
  17. E

    Finishing touches on motion alarm

    Finished product. A little troubleshooting left to do. Pictures shown are of when it's off, armed(green) , and triggered(red). The problem is when its first turned on it acts normally. After the pir warms up, it triggers the alarm even though its pointing strait at a wall. I will start looking...
  18. E

    Finishing touches on motion alarm

    Im making the necessary adjustments and finishing up the project. Stay tuned. I will post pictures
  19. E

    Finishing touches on motion alarm

    I will read up and learn how to correctly draw a schematic. Thanks for the help guys
  20. E

    Finishing touches on motion alarm

    I don't understand what you're trying to say. I don't think its a dead short I thought 15 volts seemed excessive for an LED though. That's why I included the 7805 VR. Shortly after posting the question I thought of the voltage regulator. Do you think I should skip it and just run 15 volts to the...
Top