12VDC to 3.3VDC Stepdown DIY

[FlashGordon]

I am attempting to build a garage door remote for use on my motorcycle using a small remote and a handlebar mounted momentary push button switch. What I would like to do is remove the CR2032 battery and use a stepdown converter to wire directly into the motorcycle’s 12VDC system as I’ll be putting the remote circuit board inside the headlight housing. Is this possible and, if so, is there anything I should be concerned with such as heat or anything, and what protection can or should I add?

Appreciate the help and suggestions

 

[EalingBadger]

I dont really know what there is to disagree about.

The L78L series employ internal current limiting and thermal shutdown.
making them essentially indestructible. they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or on-card regulation
for elimination of noise and distribution problems associated with single-point
regulation.
In addition, they can be used with power pass elements to make high-
current voltage regulators. The L78L series used as Zener diode/resistor combination
replacement, offers improvement along with lower quiescent current and lower
noise.

I am very happy to agree with all of that long list of impressive specs.

I just happen to think that, for those that are maybe less comfortable than you and I with all of that stuff a zener and a resistor makes for a simpler and overall easier implementation.

With profound apologies to the OP if I have inadvertently / incorrectly assumed their level of knowledge in this area.

 

[James]

I am very happy to agree with all of that long list of impressive specs.

I just happen to think that, for those that are maybe less comfortable than you and I with all of that stuff a zener and a resistor makes for a simpler and overall easier implementation.

With profound apologies to the OP if I have inadvertently / incorrectly assumed their level of knowledge in this area.

At 70p each, i would go with @mainline and just use the pre made board.
resistors, diodes etc, requires a level of knowledge to get it right that not every one has.