Using a AAA in place of a AA gives us a little bit of room (mainly in the differences in diameter) to put in a reed switch. It remains to be seen if it's enough space -- there's not a lot to work with. One of our design goals is a drop-in solution, so no actual mods to the toothbrush itself.
@@tpwalters101 The conversion would be a drop-in replacement of the regular AA battery. So, it would be protected by the existing waterproof housing of the electric toothbrush. At this point I've modeled with AAA and AAAA batteries -- what I'm going to try next is an N cell battery. It's about the same diameter as a AA but 3/5ths the length. That should give me enough vertical room. (An N is similar in size to an A23, which is often found in remotes--but is 12 V. The N is 1.5 volts.)
@@RonNelson I shower with my toothbrush so the whole thing gets submerged pretty much. That's why I was asking. I have some questions about alternators too if you're ever bored and I could get your email.
If the adapter is the same size as a AA the AAA wouldn't have any benefit.
Using a AAA in place of a AA gives us a little bit of room (mainly in the differences in diameter) to put in a reed switch. It remains to be seen if it's enough space -- there's not a lot to work with. One of our design goals is a drop-in solution, so no actual mods to the toothbrush itself.
@@RonNelson If it's too convenient, how do you plan to prevent water entering?
@@tpwalters101 The conversion would be a drop-in replacement of the regular AA battery. So, it would be protected by the existing waterproof housing of the electric toothbrush.
At this point I've modeled with AAA and AAAA batteries -- what I'm going to try next is an N cell battery. It's about the same diameter as a AA but 3/5ths the length. That should give me enough vertical room. (An N is similar in size to an A23, which is often found in remotes--but is 12 V. The N is 1.5 volts.)
@@RonNelson I shower with my toothbrush so the whole thing gets submerged pretty much. That's why I was asking. I have some questions about alternators too if you're ever bored and I could get your email.
@@tpwalters101 Gotcha. Yes, these battery conversions rely on the devices' waterproofing.
You can reach me on gmail: ron.nelson.ii