Igors switcher (EMF recycler2)

[hartiberlin]

Hi Gezgin, Gyula, Members,

Lastnight I made some measurements of the bulb hot.

Battery 6v lantern type.
Open voltage 6.32v
Bulb on voltage 5.86v
Series current .39A
DVM straight DC 
I guess its rated 2.5w @ 6v

drSpark

Okay, now at 5.86 Volts / 0.39 Amps= about 15 Ohms
resistance of hot glowing filament of the bulb.

Now please try to put a series resistor ( potentiometer)
in series with your 6 Volts latern battery
and bring it to the same brightness as your  bulb in the emf recycler circuit.
Now then calculate again the bulb filament resistance.
R= DC Voltage at bulb / current in bulb

Or better just use as I pointed out before 2 resistors ( 100 and 1 Ohm) and drop the bulbs
for the measurements.

[drspark]

Hi People,

Gezgin,
Transformer version next week....

Stephan,
scope is warming up, it takes about 20mins for beams to find the zero or you chase zero around for 20 mins
ill dig for LARGE resisters that i can make 10 and 1 ohm resisters from.

drSpark

[drspark]

Hi Stephan,

scope shots

drSpark

[hartiberlin]

Dr. Spark,
where is the 0 Volts line of the lower trace ?

There very down there where you wrote 0V  2V/ div ?

[drspark]

Hi people,

I have 4-1ohm 10w and 2-8ohm 20w large resisters.
Can arrange into 2 10ohm resisters for voltage with 1ohm or 2ohm for current measurement.

Would they help make better scope shots?

Yes Stephan at bottom just below 0v.

drSpark