Sense Circuit

Try this: http://everycircuit.com/circuit/6360776665989120 ...All I did was replace the upper current source with a voltage source (because the current source in EC is perfect and therefore it still drives the LEDs even when the mosfet is in cutoff by using a crazy high voltage, so to fix this you gotta use a constant dc source). And the last thing I did was mainly just use a higher value gate resistor, because the voltage at the last LED was too low to drive the mosfet; by using a higher value resistor in series wth the gate driving LEDs this requires the current source to increase in voltage to maintain the same current (because higher value resistors require a higher voltage drop to draw the same amount of current as a lower value resistor). I also altered the mosfet settings just to reflect a more realistic value, but it’s not totally necessary in this circuit.

4,45 GV

@Issacsutt Thanks for helping me with my circuit attempt. It seems like you changed the secondary current source to a voltage source purely so that it works within EC, but in actuality, I am still able to use a LM317 as a constant current source to drive the LEDs, is that correct?

A LM317 is a variable voltage source. The current sources used in EC are theoretical, they will generate that current regardless of the circuit resistance, and if available in real life would be worth a pretty penny.

No problem @MakotoNinja, I’m sorry I didn’t see this and reply much sooner, I’m not on EveryCircuit as much as I use to be. Honestly, I’m not familiar with that IC, but I mostly like to design circuits with using just discrete comments, and find it more fun and creative if I kinda “create my own ICs if you will”. But thankfully it looks like BillyT saw it much sooner than I and new the answer. Best of luck to all your future circuits 👍 :)