very bright LED JT but 0.4Amp taken from AA

[dave_j_fan]

THE Joule thief circuit i have made to give decent ligtht

But AMP draw is 0.400- 0.500Amp ...

can we tweak to  bring much lower , have seen many video where amp draw is less

any mistake i did  here

i use a 33uH choke as collectr side coil
4turns on coil body as coil  series to base resistor 


The  batt is AA NIMH  1 cell

[Audioguru]

How many ohms is 1.1E? If it is only 1.1 ohms then why not say 1.1 ohms instead? Then the battery is being shorted by the extremely low resistance in series with the base of the transistor.
Joule Thief circuits use at least 1k which is one thousand ohms.
Your transformer might be very inefficient and might not work with resistance in series with the base of the transistor..

[dave_j_fan]

thank u for the reply , yes that trafo is not that efficient

switched to toroid 1/4th current it is taking but not very brigth what to do

i gave 5turns for coil to base and 20 for collectr

[Audioguru]

The Joule Thief Projects and videos shown on Google show a transformer with many more turns than you have, yours is like a dead short.
A Joule Thief circuit is supposed to operate from a battery cell that is almost dead then the current and brightness are very low. Maybe your LED needs a high current. Some LEDs are designed to be fairly bright when fed a low current.

[Zero999]

Joule Thief circuits use at least 1k which is one thousand ohms.

Which is fine for a tiny 5mm LED but won't provide enough base drive for a Joule thief powering a high powered LED. I agree 1 Ohm does sound too low, even for a high power application.

[dave_j_fan]

yes , itz a little high current one ... thinking to go icbased solution