Parts list for the schoolgirl circuit

[Tom C]

Welcome,

only a few parts are needed for the Sg circuit. They are as follows:

transistor-mjl21194 or 2n3055- mjl is best
diodes- 1n4007
resistors, 100 ohm 1/2 watt and 1k ohm potentiometer same wattage for multi strand coils use 470 as a base resistance
a single Ne 2 neon with or without the 4.7k inline resistor
a grain of wheat bulb (not needed for multi strand machines) available at most hobby stores, they are used in HO scale train sets for train headlights and running lights. get the smallest wattage you can find. this goes in the trigger circuit of bifilar coil machines only.

Tom C

http://energyscienceforum.com/files/...0datasheet.pdf

[spankydoodle88]

Hey Tom you never said what size wire to use

[Tom C]

Hey Tom you never said what size wire to use

start with 20 gauge power 23 gauge trigger. 130 feet 1.3 ohms 470 ohms should get you in the park for a base resistance

Tom C

[Branch Gordon]

Wait...what happened to 18 guage wire, 150 feet, 1.2 ohms?

From what I have seen the last few months that is the advice that everyone has been given. Why the change?

start with 20 gauge power 23 gauge trigger. 130 feet 1.3 ohms 470 ohms should get you in the park for a base resistance

Tom C

[Tom C]

Wait...what happened to 18 guage wire, 150 feet, 1.2 ohms?

From what I have seen the last few months that is the advice that everyone has been given. Why the change?

that will work also. look at jb's latest post, of his latest filar energiser. my 6 coil is all 18 awg. it is about the resistancein the coil and the inductance. bigger wire coil bigger batteries.

Tom C

[Branch Gordon]

Well...here's why I asked. I am in the process of revamping my build based on you and John's suggestions in my other thread.

I bought a couple large 18awg coils, so I could wind up an 18 power/18 trigger coil at 1.2 ohms. I was planning on using the 13ah garden tractor batteries with it. Is this gonna be ok for just a bifilar coil?

[John_Koorn]

Branch, I would save the #18 for a bigger machine. The tests we ran in John's shop last week showed that for a 13Ah garden tractor battery you should use #20 for power and #23 for trigger.

John K.

[Branch Gordon]

Right on...I'll grab the 20 and 23. Thanks for the clarification.

Branch, I would save the #18 for a bigger machine. The tests we ran in John's shop last week showed that for a 13Ah garden tractor battery you should use #20 for power and #23 for trigger.

John K.

[lis_wang]

Welcome,

only a few parts are needed for the Sg circuit. They are as follows:

transistor-mjl21194 or 2n3055- mjl is best
diodes-1n4001 and 1n4007
resistors, 100 ohm 1/2 watt and 1k ohm potentiometer same wattage
a single Ne 2 neon without the inline resistor
a grain of wheat bulb, available at most hobby stores, they are used in HO scale train sets for train headlights and running lights. get the smallest wattage you can find.

Tom C

http://energyscienceforum.com/files/...0datasheet.pdf

In the beginner handbook, it recommended use 14 pieces of 1N4007 diodes, not 1N4001. I believed to use 1N4007 replace 1N4001. But you recommend still use 1N4001 for trigger circuit. Please clarify which one is better?

[D Rhodes]

I think the 1N4007 is 1000volts whilst the 1N4001 is only 50Volts...probably the 4001 is ok for the small 23#power 26#trigger bifilar coils, but with the 8filar 20#power/23# trigger coil in the Beginners Handbook, need to use the 4007. My thoughts only

[Falconer]

Hi there, I live in New Zealand and am having problems getting the same gauge wire. The awg20 (.8127mm or .518mm squared) and awg23 (.573mm or .258mm squared) is hard to come by here and I'm hoping not to have to import as the project starts getting in the -to hard basket- category. Does it have to be those sizes or can i go for awg19 and awg22 for trigger?? can i go either way?

Thanks for any reply.

As an aside I am a very new noob to electronics but am busting at the seems to try it out for myself so please forgive any naivete on my part.

[rsargent52]

Does it make a difference what the wheel is made of and the diameter?
Thanks...

Randy

[John_Koorn]

Hi there, I live in New Zealand and am having problems getting the same gauge wire. The awg20 (.8127mm or .518mm squared) and awg23 (.573mm or .258mm squared) is hard to come by here and I'm hoping not to have to import as the project starts getting in the -to hard basket- category. Does it have to be those sizes or can i go for awg19 and awg22 for trigger?? can i go either way?

Thanks for any reply.

As an aside I am a very new noob to electronics but am busting at the seems to try it out for myself so please forgive any naivete on my part.

Hi Falconer,

Those wire sizes will work, however we found that for a bike wheel sized energizer that AWG#20 & AWG#23 work best.

John K.

[John_Koorn]

Does it make a difference what the wheel is made of and the diameter?
Thanks...

Randy

Hi Randy,

Get the biggest bike wheel you can find with good bearings.

John K.

[Teo Graca]

Has anyone with a successful implementation tested the mH on the windings for the coil? I would like to try this with simple inductors. Thanks! -teo