3 7 V To 12v Step Up Circuit

Testing dc step up converter circuit using ka34063.
3 7 v to 12v step up circuit. Apply the 3 6v battery or 3 7v mobile batts to the input terminal. It operate normally till the controller reads 12 2 v it shows low battery symbol 1 then stops. Apply the led to the output terminal and measure the led voltage. This circuit can be used to power your 5v microcontroller similar circuits from two standard aa cells 1 5v x2.
It requires only three external components to become step up converter. 12 volt rechargeable lithium battery 12 v 10 ah lifepo4 4 4 out of 5 stars 78. Kangnice boost voltage regulator converter dc 3 3v 3 7v 5v 6v to 12v step up power supply 5 0 out of 5 stars 2. Ic me2108 is a step up dc dc converter with low supply current this ic reduces high frequency switching noise and output can be programmed between 2 0v to 7 0v.
And then i connected 12v led to the output then measure current input is 40ma as figure 4. Since this circuit is very popular. Summing up this project worked surely. How can i fabricate a circuit to step up the voltage to constant 12 3 v 2 1 a regardless of the actual voltage in battery.
So i tested them on real the universal pcb board. When i want to operate a led screen tv 12v 50w 22 wide. Measure current of led is 24ma at voltage 12v. Adjust the vr 10k until we read voltage is 12v.
Exclusive items from our brands. Measure current of the circuit is 100ma at 3 9v. 1 offer from 4 93.