Muller Dynamo

[TommeyLReed]

FreeEnergyInfo
The tc4421 will need a resistor going to the mosfets, or you will aloow too much power going into the gate........
tc4421 is a mosfet driver, with high output, resistor are needed for each mosfet, check data on mosfet resistor gate.....

[David70]

David70
You can trigger the 555 timer using a basic on/off switching with a transistor, in other words, the transistor is used to allow the pulse to go to its source....
You can also allow the transistor to turn on/off the 555 timer too, this does the same thing while the transistor is control by the  hall sensor.

I am also sure that is a way to connect the hall to the 555 then the 555 to a mosfet that drives the coil with many pulses every time. I have done it with a reed and the output is better.

[Rawbush]

I am also sure that is a way to connect the hall to the 555 then the 555 to a mosfet that drives the coil with many pulses every time. I have done it with a reed and the output is better.

you would send the output of the hall which usually is low to trigger of 555 (pin 2) then set the timer up in a one-shot fashion, this will allow hall triggered turn on time, and adjustable stay on time. Hope this helps. Peace
rawbush   

[Tudi]

I find this video very controvertial : http://www.youtube.com/watch?v=W5q47JJJAww . If this is true( and i read it in other places also). Then in theory if you have a pull motor and a push dynamo, you get over unity. You need to invest less energy to speed it up in motor mode then you consume as in dynamo mode.
I was thought that a magnet has a complete magnetic field, it takes equal amount of energy to get close or leave it's vecinity.

[bolt]

Google images  555 Astable. You will see about 10,000 of them. Connect the hall to the i/p trigger it pulls low when the hall is active with a magnet. Pull it up with 4k7.   Make the timing cap like 10nF and the timing R 100k pot then you can adjust the pulse window when the hall triggers. TO be honest with you at full speed rotor its going to be tiny pulse anyhow its really not worth the hassle of trying to trim it down smaller.

555 o/p it totem driver its plenty powerful enough to drive fets at low frequencies <50Khz. Over 50Khz you will benefit greatly using Fet driver.

OH BTW make sure you find the correct Hall!! They are all vastly different. Some are latching, some active on North pole only, some active south pole. Some require opposite pole to turn OFF, Some don't care, some are linear and some are digital high low with digital filter.

I use Allegro A1121 in my circuits. They are probably the best.

Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper
stabilization, Schmitt trigger, and a short-circuit protected
open-drain output to sink up to 25 mA.
Packages:
An on-board regulator permits operation with supply voltages
of 3 to 24 V. The advantage of operating down to 3 V is that
the device can be used in 3 V applications or with additional
external resistance in series with the supply pin for greater
protection against high voltage transient events.
3-pin SOT23W (suffix LH)
3-pin SIP (suffix UA)
For the A1120, A1121, and A1122, a south pole of sufficient
strength turns the output on. Removal of the magnetic field
turns the output off.

I use these FET drivers for almost everything. =TC4428

Its a dual driver one direct one inverted.  It has inbuilt crossover filter so you can use for inverter and it will not latch up. Also if something turns ON and you want OFF just change a pin!