How to prevent battery (lead acid) from overcharge and also undercharge?

[holtage]

I planned to build a tesla switch. The battery in the tesla switch will eventually increase in voltage so I need to prevent it from overcharge.
What should I used to achieve this? Using IC charge controller? Or other assembled products? Anyone suggest an IC charge controller which can fit into a breadboard? Will the breadboard limit the current of IC charge controller? I am completely novice. "Use of Tesla Switch" is far too enormous and I hardly find the info I need.

[Matthew Jones]

I do not know of 1 specific controller, but you can use any micro controller thats 32bit and has an analog port. If it does not have an Analog input port then you can use an ADC (Analog to Digital converter) to watch the charge.

I like a Propeller Propstick for prototyping. You will have to use an ADC but a MCP3204 will cover all your needs, as its a 4 channel ADC.
They already have all the libraries for interfacing the MC and ADC.
They already have libraries for everything.

You'll have to learn to code with it, but the Propellar won't let you down. It has 8 processors in 1 and you can use all of them to multitask.

Matt

[Tjjusten]

I planned to build a tesla switch. The battery in the tesla switch will eventually increase in voltage so I need to prevent it from overcharge.
What should I used to achieve this? Using IC charge controller? Or other assembled products? Anyone suggest an IC charge controller which can fit into a breadboard? Will the breadboard limit the current of IC charge controller? I am completely novice. "Use of Tesla Switch" is far too enormous and I hardly find the info I need.

All you need is simply an OP amp comparator circuit(google it). choose LM358.
it has two OPamps, one can monitor overcharge(high battery voltage) and the other for overdischarge (low battery voltage).

http://www.ti.com/lit/ds/symlink/lm158-n.pdf

https://www.youtube.com/watch?v=7beZocF34AU

Electronics Components: How to Use an Op Amp as a Voltage Comparator - For Dummies