Hello,
An old project that I'd been working on is that of an electric fishing Kontiki. I have a circuit that I think will work O.K. but I hope that someone could take a look at it and point out any glaring mistakes. In particular the mosfet motor driver circuit is of concern to me.
The servo retract button and timeset reed switch are on the same input as when the PIC starts up it first checks that input to determine if it should continue with the startup sequence or simply retract the release mechanism into the casing. The DPST switch is to ensure rough waves don't accidentally activate the servo button when in timeset mode.
The seperate voltage regulator for the servo is to hopefully prevent any brownout reset of the PIC should the servo need to draw alot of current if the release mechanism is under load or maybe jammed.
The seconday lines to the servo are in case of PIC failure or bad programming to allow me to control the servo, retract the release mechanism and get the whole thing out to be fixed.
The two reserved PIC I/O pins are for a strobe circuit I may add later. If not then I'll rearrange things on Port A to and figure out how to allow the PIC to sample the battery voltage six times a minute and average it for a more accurate reading.
The zener diode I meant to remove before making the page but I do need to ask if the mosfet needs any over-voltage protection.
Any help is greatly appreciated.
Thanks,
Rubicon.