Hello all, quick (and probably dumb) electronics question. Suppose Calculon had 3 7805 voltage regulators in parallel, like such:
Would such an arrangment share the load evenly?
I’m guessing you’re trying
I’m guessing you’re trying to get more current. With this in mind you might consider a DC - DC converter. More efficient than 7805 regulators and very low cost on ebay.
+1 
DC-DC converters are not so much expensive than linear regulators. It’s the future! When you have a battery, you don’t want to waste 60% of energy…
Sometimes I plug my Spider only to get 5Volt from my drill battery 
what if:)
Hi:) what if i use lm2940ct-05 insted of 7805. I know its stil gonna use a lot power but its much better then 7805. So can i get aproximately 3am if use 3 2940 and how efficient ist going to be? Thanx:)
It is still a linear voltage
It is still a linear voltage regulator, so all the same points apply.