I want to parallel connect 4 x AA NiMH batteries rated each at 1.2V, along with 4 x 1N4001 simple diodes to prevent unwanted current flow (recharging) between batteries. The electric circuit is:
I get an estimated output voltage of 0.7V (because of 0.5V voltage drop for the diode).
How can I rise up the voltage from 0.7V to 5V and also have the possibility of a minimum current of 1A for the load resistance? If wiring restructuring is needed, then please offer parallel design solutions, because I need as much as possible amp capacity (2700 mAh * 4).
I tried this U1V10F5 step-up voltage regulator from Pololu (https://www.pololu.com/product/2564) and it gives me 5V, but somewhere in this circuit I think there is a high resistance (possible some current blocking from the diodes?), because the output current can't power up even a regular LED, when it's put in place of a resistance load (with some adequate resistance for the LED of course).
Thank you so much!