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You asked for rudimentary info, so I hope this helps...
You could use a 12V 7Ah rechargable lead acid battery, the type used in emergency lighting and alarm boxes. They are easy and cheap enough to come across.
For the 5Volt part, you could buy an off the shelf DC to DC convertor such as...
Does anybody have a schematic or service manual for a Goodmans Digital Camera. Model No GDC 1308 TFT. The camera is dead and a new set of batteries run down and get hot very quickly. I expect a short but would like an idea of the layout before I commit to opening it up.
Re: Voltage drop
You dont want to use diodes or you dont want to use a regulator. Why...? Thats what regulators are for. I assume you dont want to use any transistors or are transistors OK.
The following circuit link contains one 1N4001 diode and 4 transistors and a small handfull of...
diode silicium detection am
The OA79 is a germanium based diode. This conducts in the forward biased direction at ~0.3Volts. Silicon diodes Conduct in the forward biased direction at ~0.6 or 0.7 volts. If you are wanting to detect weaker signals a germanium diode is a good choice. Nowadays we...
The quickest and easiest way would be a transformer followed by a rectifier/regulator circuit. I know a few ways to step down the voltage without the transformer but they do not offer the isolation or protection. Cheap is not always safe.
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