The 2N7000 taking power from the + 5V.Almost right. You put a resistor at the bottom of the LED and amplify and feed back to the 555.
The 2N7000 should get power from the +15V not the +12V.
The Gate drive from NE555 to 2N7000 is not good. You need a P-MOSFET or a new way of driving the Gate above the supply.
Do not need the 5.1V Zener.
There are "LED drivers" that are "buck mode" and "constant current" which would replace the second NE555 + LM311 + 2N7000 + more.
|Thread starter||Similar threads||Forum||Replies||Date|
|XL6005 understanding the datasheet||General Electronics Chat||15|
|M||Proper voltage to power an LED with a constant current power supply.||General Electronics Chat||26|
|J||Designing 10A constant current power source (0-50 V)||Power Electronics||27|
|W||Running LEDs in series with a constant Current power supply. How did get rid of 7.2 khz noise/ripple||Power Electronics||28|
|A||Driving High Power LED's - Constant Current||Power Electronics||6|
|XL6005 understanding the datasheet|
|Proper voltage to power an LED with a constant current power supply.|
|Designing 10A constant current power source (0-50 V)|
|Running LEDs in series with a constant Current power supply. How did get rid of 7.2 khz noise/ripple|
|Driving High Power LED's - Constant Current|
by Luke James