12v to 6v voltage regulator at about 15 amps Answered
Hi, i have a 1963 VW bug that is very stock, but the 6v lights just dont work very well (dim at idle, then not too bright at speed) it is very simple to use a later 12v generator and then swap out all the lights, battery, coil and relays and it works great. BUT i have a 6v wiper motor and also a 6v gasoline heater that i will need to keep at 6v (the 12v parts are just not available or too expensive)
I have found an article that recommends building a cheap voltage regulator using a 7806, ( 6 volt, 1 amp regulator) and 2 1uF 35v tantalum capacitors, then a NPN transistor which the original poster says is a 2N5881 npn transistor. here is the scematic.
the pdf article is attached and the link to the original article is here http://www.studebaker-info.org/tech/6-12V/6-12-6.html
The questions i have
1. what is a 2n5881 been replaced as? i cannot find it at jameco and the original posted doesn't give any specs for it.
2. how would i "pump up" the amps available from 10 to anything else (looking for about 15 amps) thinking that the npn transistor is the key but i am new to this and wouldn't even begin to know where to look.
3. what happens if any item fails? can i put some sort of safety into this so it quits rather than passing any addition voltage through
the heater runs at about 85 watts so 85 watts / 6volts = 14.616 amps
the wipers run at much less than that so building 2 of this would work great.
Thanks in advance for any insight to this