I have a rechargeable hair trimmer/shaver that has a slowly dying internal battery. I'm thinking that it would be cool to convert it over to using AA sized batteries.
The eneloop, well all the AA rechargeable batteries are all bloody 1.2V not 1.5v like the non-rechargeable batteries. Why that is I do not know. That me because they will not work in my wireless keyboard.
Anyway. The shaver says 1.6V. One eneloop recharge battery is 1.2V, so this is well under the required 1.6V of the shaver motor.
But two batteries together are 1.2v+1.2v = 2.4v which will make the motor spin out of control and the shaver will shoot up my nasal cavity.
So I need to bring 2.4V down to the required 1.6v. I see you can use voltage regulators and a couple caps to do this.
1. When a fresh battery is 1.2v, how much will it be when it is empty? I will need to know this for the voltage drop value for selecting a voltage regulator, right.
2. Anyone recommend a part number of a regulator?
3. What about capacitors what size adn value would I need.
4. Why are normal batteries 1.5V but rechargeable ones 1.2V?
The eneloop, well all the AA rechargeable batteries are all bloody 1.2V not 1.5v like the non-rechargeable batteries. Why that is I do not know. That me because they will not work in my wireless keyboard.
Anyway. The shaver says 1.6V. One eneloop recharge battery is 1.2V, so this is well under the required 1.6V of the shaver motor.
But two batteries together are 1.2v+1.2v = 2.4v which will make the motor spin out of control and the shaver will shoot up my nasal cavity.
So I need to bring 2.4V down to the required 1.6v. I see you can use voltage regulators and a couple caps to do this.
1. When a fresh battery is 1.2v, how much will it be when it is empty? I will need to know this for the voltage drop value for selecting a voltage regulator, right.
2. Anyone recommend a part number of a regulator?
3. What about capacitors what size adn value would I need.
4. Why are normal batteries 1.5V but rechargeable ones 1.2V?
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