Here I introduce a boot converter circuit for flash light using transistor. It is a boost circuit which work from the 1.5V. That is by using this circuit it is capable to light an LED. Here this circuit is made by using SMD components. It is because I made it for inserting inside an old flash light.
For more details about the circuit, Please visit my BLOG, link given below,https://0creativeengineering0.blogspot.com/2019/04/transistor-boost-converter-for-led.html