How about a battery charger that does just about any AA battery? NiCad, NiMH, rechargeable alkaline, NiZn, LiFePO4 ... maybe even LiIon batteries. I haven't tried one yet but it is in the voltage range I think. A "good" battery charger it may not be. It doesn't note the voltage drop indicating a proper full charge. It does note peak voltage, adjustable to meet the needs of various batteries. When peak voltage is reached it shuts down and lights a light.
Other than not noting that voltage dip it breaks a few other rules. Power is about 7 V. This voltage also runs the 74LS74 TTL chip.
Other than not noting that voltage dip it breaks a few other rules. Power is about 7 V. This voltage also runs the 74LS74 TTL chip.
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