I am doing a project where I have three Laser LEDs. They need to send three different signal lengths. I am doing this with three NE555D Timer, one for each signal.
The problem is: I am not coming to the needed current (25mA) for the LED.
Should I do it with a Transistor?
How should I change the circuit?
Thank you :)
At Trig I am using a button. At Output (Out) I am not getting the 25mA.
The circuit presented has multiple issues.
First of all, it cannot work if NE555 supply does not come from battery, but via R1.
The transistor is also useless as it is just used as a diode which provides a voltage drop before the load.
The diode should not have that many volts over it, so with 9V supply the 3 ohm resistor can already drive more than 1A current which exceeds NE555 output and the diode current.
Depending on what the supply or battery is, it might be incapable of producing the current you want.
