Electronic circuit with Op-Amp, Switch and Diodes

In summary, the given circuit includes operational amplifiers, double-switch - S, for two situations, 1 and 2. The type of switch is DPDT - Double pole double throw, and it also includes two diodes and two lightbulbs, L1 and L2. The voltage of each diode is 0.7V during conductance, and L1 is red with a resistance of 120 ohms while L2 is green with a resistance of 150 ohms. The circuit works by controlling the flow of current through the different branches, depending on the position of the switch and the amplification of the op-amp. The type of op-amp connection in this circuit is a NON-INVERTING op
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  • #37
http://img535.imageshack.us/img535/5793/t2774.gif

Tiny discordant note is your comment "L1 lights more brightly". Why?
 
Last edited by a moderator:
  • #38
Because it has more current going through it?
 
  • #39
Femme_physics said:
Because it has more current going through it?
Hmmm <checking back sees they have different resistances>. Quite right! :wink:

Well, almost certainly right. Providing they have equal voltage ratings, the higher current one should be brighter.
 
  • #40
Femme_physics said:
Ok, I think I got it... :)

Yep. :)
 

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