3v OU Flashlight

[magpwr]

The period between your pulses is approximately 400ns.  The Russian guy had 11µs.
Maybe with a larger core it will be longer.

What is the pk-pk voltage amplitude of the signal applied to the 1k resistor ?  Any DC offset ?
Like this ?

hi verpies,


You got it that's my setup as describe.

The square waveform was set at 5volt vpp.

Since i merely constructed only 1/2 the circuit using 4069 using 10uf i noticed the blinking of led is slower.

Since base on known fact our human eyes can only detect up to 18hz led blinking rate.
Base on original video it looks somewhere between 10hz...15hz

In another words the capacitor value 10uf may need to be reduced to 4.7uf or 2.2uf .I have not tried checking the frequency from 4069 using 10uf yet.

The duty cycle need to be low to consume less power from battery.It's the reason why i mention the cap value needs to be 4.7uf or 2.2uf."But not tested yet to let me see waveform."

Base on my posting earlier in the day.I did not mention the waveform /vpp is also the same for duty cycle between 5%to 15% .I just played it safe for comment purpose at 5%.
The big different is input current consumption between 5%...15% .At 15% duty i think i was around 38mA.

[avalon]

That does not compute.  The experimenter in that video states 25 turns for one winding and 50 turns for the second.

Glad you agree. However, I have checked (as you can see from the picture).
Little it may be it give us a clue. It basically means that the shield is irrelevant.

~A

[avalon]

Can you show the signal applied to the base of this transistor?  ...or at least describe its shape, frequency and amplitude as well as the relation of its edge to these fast pulses at the collector.

Of course, though I am not sure how's that going to help.
Here it is. The second trace is the collector signal.

~A

[TinselKoala]

Of course, though I am not sure how's that going to help.
Here it is. The second trace is the collector signal.

~A

Am I reading the scope right? The Blue trace is the signal to the base of the 2SC1815? The channel is set to 5 V/ Div? So you are applying pulses of about 9V peak to the Base of the transistor?

But... but.....

[avalon]

Am I reading the scope right? The Blue trace is the signal to the base of the 2SC1815? The channel is set to 5 V/ Div? So you are applying pulses of about 9V peak to the Base of the transistor?

But... but.....

Hmm.... I don't get it either. The signal amplitude on the base is 2.4V
I have attached a couple of pictures. The first one is on the output of 74HC14AN (pin 6) and the second one is @ the base of C1815.

The power supply is 3.30 v
I have no idea how the error occurred.

~A