|View single post by Bob R|
|Posted: Sat Dec 22nd, 2018 12:26 pm||
|I also use primarily Pololu 9 volt regulators.
Most engines are geared to run way to fast at 12 volts.
You should test run an engine to see how it runs at various voltages.
I have found on some 5 volts is plenty for prototype operations.
Keep in mind that the more you boost the voltage from a battery the less efficient the regulator is.
Boosting from a single cell lipo (3.7 volts) to 9 volts is not very efficient.
Boosting from a two cell lipo (7.4 volts) to 9 volts is very efficient.
If 5 volts will do the trick the Pololu 5 volt with a single cell is very efficient.
The Porter, as an example, runs one hour using a single cell.
I have other Bachmann engines with the same motor using a two cell that run in excess of two hours.
Carefully consider your running needs/desires and the configuration that best suits you and space available for the battery.