switched series or parallel circuit with relays

157

02:14:34

looking to use a 3 way switch to power the 2 electric fans in my car i came up with these two circuits, the top one puts the 2 lights in a series or parallel circuit depending on which way the switch is flipped and the amperage differs each way,  the bottom circuit is a on/off switch to run only one or both fans(I'm using lights here for a visual representation of what each circuit does). I made this basically so i would be able to hook my cooling system up without struggling on remembering how the f*** I'm wiring it when it goes in, feel free to comment it's my 1st post im still learning 

published 8 years ago

BillyT

8 years ago

The relays may not be required, all depending upon the total circuit load, if it is under 10 Amps couple of switches (or an off - on - on switch) and a diode are the maximum that is needed. http://everycircuit.com/circuit/5582105460604928

DastardlyD

8 years ago

ill have to check that out, and if I'm not mistaken each fan I am using this circuit for draws around 7A constant and 10A on startup , and between the batt. and switch there's a drop of around 1.4- 1.6 volts

BillyT

8 years ago

If you have that type of current, your will have to use relays. If you have that size voltage drop between battery and the switch, use larger wire.

hurz

8 years ago

http://everycircuit.com/circuit/4747864191533056

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