4..60v CONSTANT CURRENT for leds

4..60v CONSTANT CURRENT for leds

https://drive.google.com/file/d/1fzpGkjXzCWwjOOtjRZh0rvLtdVN5eFV0/view?usp=sharin

to keep the brightness the same bulbs that require constant voltage

unlike luminous diodes (LEDs) should be driven with constant current.
but the LEDs only voltage across a resistor
to a very changing resource  If they are connected, things get complicated.
At 5v supply voltage For 20 mA LED current
180 ohms to resist whereas at 24 V supply voltage
Must be 1.2 kohm (1w). that has value between the two
a resistance can be selected. but when the tension dropped at that time
The LED will become very dark, when it rises Enough to damage it from the LED
large current will flow. but as in the figure if a constant current binary is used
the situation will become simpler. Constant current with these elements

bilateral working voltage zone   It is 4 ... 60 v. throughout this region

I current constant and It is 13mA. total power spent in the circuit
Highest with 0.8w at 60v. reaches the value.

farmer goat wolf cabbage

 

farmer wolf goat cabbage

 

 

circuit made with farmer wolf goat cabbage 7400

"Proteus   v8.09 simulation"and"Circuit Wizard simulation" 

https://drive.google.com/file/d/1uZzmT3RgqJXav6RF7HdaWxYVLVo7lXPc/view

 

A farmer comes to a river with a wolf, lamb, cabbage, wants to cross, a small boat stands on the shore,

However, this boat can take only one animal or cabbage with the farmer, so the farmer must constantly cross the river, crossing only one animal or cabbage.

The point begins then: when the wolf and the lamb are alone on one side of the river, the wolf eats the lamb. When the lamb is alone with the cabbage, the lamb eats the cabbage. must prevent.

Youtube   https://www.youtube.com/watch?v=GWxzJtCIp-w

integrated circuit 7400 

diodes OA90, AA118 .. 4 pcs

resistance 220 Ohm 2 pcs