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Well
It's (the 8V camera PSU cct) running with under/over voltage cut-out.... but I'm going to chuck the lot and start a new!
Problem is the basic linear regulators like the LM317T are rated to 1.5A (ideal) and when testing my cct at .5A load (constant) this regulator gets too hot! I cannot heat sink it adequately.
I got the under/over voltage protection working OK. Cuts in at 7.5V and out at 8.6V with little hysteresis.
So I'm going to try some of the new generation regulators like the LT1185. A 3.5 Amp (TO220 5 pin device) but the bigger package will help with heat dissipation . It has: Low drop regulator; 1% reference voltage stability; programmable over current (fold-back/cut-out or what ever you like); Shutdown ...I can run my under/over volts to command the chip to Shutdown.
So it's all back to the drawing board for me.
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