5V dc cirquit shutting my home electricity

Discussion in 'General Electronics Chat' started by יוסי שלי, Aug 28, 2015.

Thread Status:
Not open for further replies.
  1. יוסי שלי

    Thread Starter New Member

    Aug 28, 2015
    2
    0
    I've made a cirquit in which I've connected to another cirquit that feeds from AC.
    I've connected to a 12V dc on the board and used V-Reg to take it down to 5 V which I used for the PIC and LCD Cirquit.

    When connecting the Pickit 3 to the connector on the board I've build, the electricity in my house shut down!

    Nothing bad happened, nothing burned up, it just shutting down the electricity in the entire home.

    I've tested with a scope the 12V line which I've connected my cirquit to, and it all looks normal. a 12V dc with 600mv P2P noise!

    I also found out that when I thouch the ICSP connector that comes out from my cirquit, I get elecreshooted!!!

    What the hell is going on?
     
  2. crutschow

    Expert

    Mar 14, 2008
    12,995
    3,229
    Sounds like the circuit is not isolated from the AC power line.
    Post a circuit diagram.
     
  3. dl324

    Distinguished Member

    Mar 30, 2015
    3,242
    619
    Draw a diagram of how you have everything connected; from the adapter plugged into the AC outlet to the ICSP connector that is giving you a shock.

    Do you have multiple breakers in your power panel and you're saying that this circuit causes your main disconnect that feeds all of them to trip? The bottom line is that if a circuit powered from an AC adapter can bring down power for your entire home, you probably have more problems than anyone here can help with and you should hire a local electrician.
     
    nsaspook likes this.
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
    Normally the 'entire home' means a 100amp or a 200amp breaker tripped? Which I find Hardly likely?
    You obviously do not have galvanic isolation on your home built circuit.
    You need to cover safe procedures before going any further.
    Max.
     
    GopherT likes this.
  5. Howard Evans

    New Member

    Aug 17, 2015
    2
    3
    Nothing bad happened? I get elecreshooted sounds pretty bad to me.

    Unplug everything. Step back from the bench and raise your hands. Now call someone who knows something more about electricity. No one here should be offering advice from afar concerning your potentially lethal problem.
     
    cmartinez, #12 and GopherT like this.
  6. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,001
    3,756
    I want pictures of that PICKIT3 - after the incident. Was it a co-incidence or what is cause/effect.
     
  7. יוסי שלי

    Thread Starter New Member

    Aug 28, 2015
    2
    0
    OK, relax everyone. Some people here took it too far.
    I got a device connected to my main line that shut everything when it suspect of short-circuit to prevent people to be electrified!!!

    That's the reason the whole power was shut down!!!

    The circuit I've build is working very well when connected to the host device and no problem there. the problem arises only when I connect the ICSP to my circuit while the device is connected to the main line.
     
  8. nsaspook

    AAC Fanatic!

    Aug 27, 2009
    2,907
    2,165
    Stop. Have a qualified professional check the house wiring
    If you have a GFCI and it tripped then it's likely that something is causing sneak path from hot to ground instead of the normal neutral return path. What type of AC power adapter (name & model number with any voltage information) to power the device are you using and are you using some sort of power filter or surge protector to power the adapter?
     
  9. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    Where is the schematic?

    Many of us take safety pretty seriously around here.. Your circuit should be using a transformer for isolation from the mains.

    We also dislike guessing...
    Instead of stating things like "I got a device" could you please just tell us exactly what it is..
    And make sure to attach that schematic..
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
    I suspect it is a country that has a RCD/ELT/GFI 'Device' for the main disconnect, instead of individual GFI breakers as N.A.
    Max.
     
    Last edited: Aug 28, 2015
  11. bwilliams60

    Active Member

    Nov 18, 2012
    722
    88
    Three things. Where are you located, what is your hydro source and can you please post a schematic of what you have done. In my world, it would take something very large to shut my entire house down and there would be smoke involved. this sounds pretty interesting.
     
  12. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
    2,781
    1,227
    Ah ha! A load center GFI -- That makes much more sense! -- In any case you are best advised to use a line isolating PSU for your project...

    Best regards
    HP
     
  13. dl324

    Distinguished Member

    Mar 30, 2015
    3,242
    619
    You caused our alarm by not giving sufficient details. This forum has people from all over the world with different electrical codes. I based my response on how power is connected in my area.
    Then there's a problem with your circuit. Draw a diagram of how you have it connected to your outlet. There has to be a grounding/isolation problem. You said electrocuted, but you obviously meant shocked. In my area, electrocution is fatal. In any case, if the voltage is high enough for you to be shocked, it's a dangerous situation.
     
  14. #12

    Expert

    Nov 30, 2010
    16,261
    6,768
    Yellow card. Present a circuit drawing or this goes no farther.
     
    DickCappels and nsaspook like this.
  15. DickCappels

    Moderator

    Aug 21, 2008
    2,648
    632
    Please, nobody give hints at what should be in the diagram.
     
    cmartinez likes this.
  16. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,779
    1,103
    Then it may not be working properly, since .....
     
  17. DickCappels

    Moderator

    Aug 21, 2008
    2,648
    632
    To keep things from getting out of hand and having the safety of the TS along with that of others who may come across this thread later, I have temporarily locked this thread pending receipt of the requested drawing.
     
    Howard Evans and cmartinez like this.
Loading...
Thread Status:
Not open for further replies.