Still Under Testing:    Preliminary Schematic, PCB and Picture Below.
Unfortunately Testing this with long Recycle times, Takes Time. But I will complete this as soon as possible.
For those who wish to play a bit, Go ahead and build it.

I Have a Small Problem with this circuit,
And I don't recommend it be built, Except for just expermenting.

It is Most Important:  To Discharge Batteries "Properly", Before Charging them.
Failure to do this Results in Memory Problems and Loss of Power.

Batteries Used in Digital Cameras Do Not come Anywhere Near a Proper Discharge.

Playing with the Some Various Delta-V,   IC Chargers available on the market, I was not happy with there performance. I found that some batteries would not shut down with the Delta-V detection. These IC's also allow for Temperature Over-Ride, but they typically use Thermistors to detect this. And More often these are not easy to obtain.
So I decided to use Very Common Diodes in my unit to detect this temperature change, as well as compare it to the Ambient Temperature.

I Specifically Designed this circuit to charge 2 Batteries for my Digital Cameras, but it can be modified to charge 3, 4, 5 or more cell. However, It will Not Work with only One Cell as that voltage is too low for even this LDR Discharge Regulator. If you decide to Always charge 4 or more batteries, the REG1117A could be replaced with an LM317. But with only Two cell, this will not work.

It is Recommended to set the discharge, Down to 1.1 volts per cell at a rate of 1/10 capacity.
This Prevents any Memory from occuring.
Therefore on an 1800 mAH battery, the Discharge current would be 180 mA.
This is A SLOW PROCESS, And can take MANY HOURS, depending on the charge remaining in the battery.

Discharging these types of batteries at a higher rate will Not Recommended and "Can Cause Damage".
A Proper dis-Charge and Re-Charge takes Time,
But it is Well Worth it.

Additionally in my tests:   I have found that the 1 Hour Quick Charge, does not produce as good of results as a 4 hour Charge. But that choice is yours.

I use 3 sets of batteries, Each set Numbered and Alternating them is not a problem.

Main Features:

A Current Regulated Discharge at 1/10 Capacity to 1.1 volts per cell,
               Or at least: This is what I Recommended.

A Current Regulated Charge at a Rate you chose. If Under around 800 mA, D8 can be a 1N4005.
            If Over 800 mA, I suggest you find an appropriate diode, to handle the current.

Auto Discharge, Followed by Auto Charge. No Buttons to push.

Charge rate Stops when batteries reach a Pre-determined Temperature.
             It does Not Restart cycle until power is Disrupted.
            Note: There is a Slight Discharge of about 2 mA, due to Sensing components. Although this is a small
             current, I Suggest Batteries be removed shortly after charging ends.

Neither Charge or Discharge will start again until batteries are removed and replaced,
            Or Power is Interupted. Specifically, I recommend putting in the batteries, than applying the power.

I did Not include a Trickle Charge as that is NOT Recommended for NiMh batteries.
            But a Resistor Bypass could be added, if a trickle charge is wanted.

A Red LED Indicated that Discharge is occuring.
             A Green LED Indicate The Charge is now going on.
             When Both LED's are Off, the battery is charged and ready for use.

Additional NOTE: If the batteries are Below lower Voltage of 2.2 Volts when attached, charging will not occur.
This will usually only happen on a New set of uncharged batteries.
SOLUTION: Momentarly grounding pin 3 will disable Discharge mode, Than Momentarly Grounding Pin 5 will start the charge mode.