Thread: Earth Rods
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Old 08-04-2014, 12:07 AM
Bob Smith Bob Smith is offline
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Join Date: Sep 2007
Posts: 795
Quote:
Originally Posted by ronym View Post
i think earth has capacity to become negative pole than positive pole
.
few years ago i have "weird" result from my "ground" pole
i using earth as negative pole against positive pole from ignition coil
.
this setup make it as unusual electrical circuit
because usually if we use earth as "grounding" we attach it with negative pole of battery
but this time i am not connecting negative pole of battery to the ground
( i just connecting negative pole of battery to 555+Transistor and negative pole of ignition coil )
.
"theoretically" this circuit will not work ( positive pole of coil are not against negative pole of coil... rather it's agains "nothing" )
.
but i am surprize by it's result :
1. high voltage DC, jump between positive pole of ignition coil and the earth. as if the earth become negative pole
( just make few mm gap between positive cable from coil agains floor or soil will do the same )
2. in this electric jump, i heard "humming" or "cracking" sound
3. transistor become colder ( compared to "normal" setup )
4. 555 output freq seems increasing ( if we attach it to running LED or freq counter we get freq of circuit jumping )
and when i turn the potentiometer i am failed to change it's freq
as if it's freq lock in the circuit
Ronym,
This is very interesting. Am I right in understanding this is the way your set your circuit up?

- grounding rod connected to positive of battery (Lead acid battery?)
- negative of battery to 555 timer (astable mode)
- output of 555 timer to negative terminal of ignition coil
- positive terminal of ignition coil to earth with 2 mm spark gap between pos. terminal and wire

Is this the way you set your circuit up?
Bob
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