I need to convert 6vdc to 3vdc. I am using 4 "D" cell batteries in series and will be using the 3vdc to drive a portable lazer alignment device. The 3vdc needs to be not over 3vdc but could be just under (2.9vdc may be acceptable). The input is obviously a nomnal voltage as with 1.5 vdc cells, the voltage will vary from full to drained cells. The current the lazer circuit will draw is about 100mA so power consumption is extremely low.
I have looked for POL converters but can't seem to find any that can be adjusted to 3vdc out rather than 3.3vdc out. The closest I have came is a Texas Instruments TPS54110 evaluation board but the resistor I need to change to adjust the output voltage is surface mount and quite difficult to change.
I am looking for a circuit that is simple, cheap easy to build and that does not consume a great deal of energy (an efficient circuit).
I have looked for POL converters but can't seem to find any that can be adjusted to 3vdc out rather than 3.3vdc out. The closest I have came is a Texas Instruments TPS54110 evaluation board but the resistor I need to change to adjust the output voltage is surface mount and quite difficult to change.
I am looking for a circuit that is simple, cheap easy to build and that does not consume a great deal of energy (an efficient circuit).