THIS MACHINE KILLS
CONSIDER ALL PARTS OF THIS CIRCUIT AS BEING AT MAIN VOLTAGE.
It can kill you even when there is NO spark.
As you were already told - and as should be obvious to you from the "instructions" - the 5 nF is much too small. 5 nF is 1/200th (1/2 a percent) of the 'specified' value.
If the dimmer functions at that load level you WILL get SOME output but it will be very low.
Using "any old capacitor" is liable to cause capacitor breakdown.
Consequences are liable to be not marvellous.
Someone suggested using the capacitor from a microwave oven.
You could try that.
Do you think the coil could have been damaged due to the lack of spark?
Unlikely. If you at any stage managed to connect the dimmer to it without the cap then it could easily be dead.
DO NOT use AC mains for this test.
Do not use a capacitor FOR THIS TEST.
Connect a spark plug to the EHT output.
Connect a 12V OR LESS battery to the inputs then disconnect.
At the moment of disconnection you should get a spark.
Also, without the cap [& using AC mains], would the light dimmer also be damaged due to the back emf?
Trying it without the capacitor is akin to the
"intercepting the speeding bullet without the bulletproof vest test".
THIS CIRCUIT IS LETHAL.
It will try to kill you if you do everything "right".
It is a kluge / hack / heath robinson / ... lashup that happens to survive well enough (apparently) when done "right". Doing it without the cap is way way way beyond the pale. (ie even more lethal - it may kill you 2 or 3 times at once). |
YES - without the cap it may well kill the dimmer - and back emf is just one of the ways it may do so.