New MOSFET Switch - Part 2 of 2

Getting a perfect square wave to end up on the output side of a circuit can be a difficult task. But with a lot of research and a little elbow grease, I think I've found the circuit for the job.

Category:

Science & Technology

Tags:

• hho
• brown's
• gas
• mosfet
• amplifier
• circuit
• water
• fuel
• cell
• free
• energy

[sirHOAX]

Nice set-up, the advise and the layout are top-notch. Can't wait to see the high-voltage inputs, because that is one arena a lot of us have yet to play in.

Again, nice work. Glad to see the 4-trace O-scope has been added to the arsenal.

Regards, --S--

[tvryb]

oh yeah. lots of fun on the way! good to hear from ya!

[pochintwin]

very nice job

[tvryb]

thanks!

[web7days]

is the 2n700 is a good choose as a switch?

the gate will have a voltage 1 to 4.5 V.

the drain does not matter, but normally 5~ 7.2 V

I want to make use the atmega 128 to on and off the beacon.

[andreaacme]

Another question you asked was the ripple on the output wave ... that is easily explained by capacitance (of your cell plates which emulate a big capacitor) in the case of your cell. It is also explained by inductance (of your light bulb, as it emulates a coil of thin filament which produces an EMF) in the case of your bulb.

Having said this, I would also add: damn good work! We need to investigate more on these cells.

[andreaacme]

Yes, the nMOSFET will work with any input waveform that at some point crosses the +Vth voltage (it is specific to the MOSFET used: in your case is 2v @25°C). In fact if you look at your scope the output switches at exactly that voltage. Moreover, you don't get slopes but abrupt changes in state because you are using the MOSFET in a switching config. You are using it in the saturation region all the time and not its ohmmic region (where it would be considered an amplifier and not a switch).

[darijo203]

Why don't you try with CMOS? Two MOSFETs, one PMOS and one NMOS FET. It should result in more "stable" waveform at higher frequencies.

[blasttapes]

I believe I used that same scope throughout the 90's repairing thousands of VCR's. Enjoyed your presentation. Keep up the good work!

[john29302]

oscillations happen on sine waves not square waves....makes resonance achievable

[sparten1114]

try a bifla wound coil, next try a air core. also maximise with return back emf. you will see a net gain in performance and lower power consumption.

[cribcat1]

Keep up the good work, looks promising.