I have been tasked with finding a solution for the following:

There are two separate 12vdc circuits that, when closed, will light up a single LED indicator. It is for an activity where two people race to complete a series of dexterity tests. As each section of the test is completed, micro-switches are closed and they move onto the next section. Upon completion of the final section, there is a single LED indicator that is powered (shared by both circuits). Sometimes only one person will complete the circuit and sometimes both will complete the circuits at the same time. The problem is that if each circuit has an output of 12vdc (less than 500mA) and both circuits are closed, the LED will then receive 24vdc...but sometimes will only receive 12vdc.

Not sure how to handle it (as simply as possible).

Any help would be appreciated!

 

Why would they receive 24V?

A sketch of the circuit as you are currently envisioning it would sure help, since we aren't mind readers.

This sounds a lot like homework and would probably get broader attention in the Homework Help forum.

 

What has this to do with regulating voltage (as per the thread title)?

 

Connecting (2) 12 volt wires together does not cause 24 volts. Post your schematic so we can see what you are talking about.

 

Connecting (2) 12 volt wires together does not cause 24 volts. Post your schematic so we can see what you are talking about.

Try a little harder it may make you break 10000 messages before the new year 2015 ...

 

Oops. Missed the Wbahn post and said exactly what he said.

 

Oops. Missed the Wbahn post and said exactly what he said.

Positive reinforcement -- may even do some good.