I wonder if someone has a very simple special LED flasher ( using discrete components) with a uP GPIO input to stop the flashing and constantly turn on the LED. What I want to do is flash the LED, telling the user that the power is on and waiting for the computer to boot up. Then, when the computer has booted up, the LED changes from flashing to a constant on. The uP signal is a 3.3VDC and goes high when it has booted up. I am hoping the flasher supply voltage is 3V, and I want to use SMD MOSFET compounds if possible. The flash rate should be somewhere around 2 or 3 flashes per second. I found on the line LED flashing circuits, but the transistors in those designs are obsolete. Thanks for sharing.
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