3v OU Flashlight

[From other Planet]

@MenofFather,
maybe with isolated mosfet driver for that mosfet it can work. Like in the chinese DS replication with the 6 HV Fets connected in series

[magpwr]

hi Menofather,

I have spotted 1st replication attempt from Russia base on similar key component used:Ferrite pot core.
The circuit didn't work for him but i can't tell merely by looking to see what is wrong since i don't understand Russian.

I can't tell what did he miss eg:fast diode,Coil spec unknown,no tuning was even done in video.

http://www.youtube.com/watch?feature=player_embedded&v=wHPsqVGXrBg


This is being discussed in this Russian forum.
http://zaryad.com/forum/viewtopic.php?f=8&t=8534&sid=44665f28bfdfd77d63d99cdd0f90dcbe&start=20



----------------------
hi everyone,

Although i have not received the components yet to even start on this project.

I have made a very important finding and likely final discovery for MC34063 on how to reduce current consumption once the circuit is completed.

The capacitor value between pin 3 and pin 4 would need to be changed according to your ferrite core value.

You see the tuning the potentiometer for the MC34063 only set  the required boost voltage output,just for example 3volts in 5volts output.

But you see the inductor reading\value  on core between connected to pin1 and pin 7 plays a huge role.

Long story made short.By changing the capacitor value 510pf to a higher or lower value all depend on the inductor\ferrite pot value between pin 1 and pin 7 of MC34063.

Steps to take to increase MC34063 efficiency-
1)First try without the switching I/C:4069  (Remove ic from socket or remove resistor to transistor only if everything was soldered onto board without socket)

2)Adjust pot until you get for example 5volts  at 1000uf capacitor using 3volts supply.

3)Observe the current consumption to circuit using 3volt supply.

4)If the current drawn by MC34063 is insane high like 200mA or even 100mA with just output to white Led via resistor.
   Please alter capacitor value between pin 3 and pin 4 until current consumption is lowered until you find the most suitable capacitor to use for your DIY ferrite inductor/ferrite core.

You will likely notice the voltage across 1000uf capacitor is still at 5volts for example.But this time the overall circuit efficiency is greatly improved at lower current drawn.

-----------------------------------------
My justification-

The capacitor value 510pf is likely a incorrect value since base on my knowledge any windings you do on larger ferrite core then likely it would be in Mili Henry since turns is around 25..30..
Optional L/C meter can be used to verify this.

510pf would be more suited for inductor value around 220uH.


who knows the 510 might be a 510nf instead 
 

[semenihin-77]

http://www.youtube.com/watch?v=pUW-3yXQIWQ 

[T-1000]

http://www.youtube.com/watch?v=pUW-3yXQIWQ 

Hehe, I said you already, akula0083 is all in it

https://www.youtube.com/watch?v=7V8vC0UL-XY

[MenofFather]

Вадим, тебе предложение, как усилить мощность. Диоды шотки только. Мотается дополнительная обмотка, поверх или под низом, не важно, из такого количества витков, как примерно одна из обмоток. И ещё 1 мкф конденсатор добавил, лучше 100 вольт, но он не принципиален, он может повысить мощность.