Hey all -
I'm solving the following with an AVR. For fun I tried to figure out how to implement this without a micro controller but failed.
You have a pot, and an led. When you turn the pot, the led blinks for a period of time. The amount of time the LED flashes is in proportion to turn of the pot. The frequency of the led flashing is not really important, say a few hertz.
I was thinking with the pot setup as a voltage divider. If you turned the pot the change in voltage could be used to enable an oscillator.
One thought I had is that you use a couple of 555. One as a LFO, and another as a one-shot that enables/disables the LFO.
From there you use the pot as a voltage divider feeding a voltage comparator. The voltage goes higher, the comparator output goes high, turns on the one shot which enables the LFO for a period of time.
I got stuck on how to dynamically change a voltage comparator to set the new threshold.
Anyway - an interesting puzzle. Anyone have any ideas?
Cheers!
I'm solving the following with an AVR. For fun I tried to figure out how to implement this without a micro controller but failed.
You have a pot, and an led. When you turn the pot, the led blinks for a period of time. The amount of time the LED flashes is in proportion to turn of the pot. The frequency of the led flashing is not really important, say a few hertz.
I was thinking with the pot setup as a voltage divider. If you turned the pot the change in voltage could be used to enable an oscillator.
One thought I had is that you use a couple of 555. One as a LFO, and another as a one-shot that enables/disables the LFO.
From there you use the pot as a voltage divider feeding a voltage comparator. The voltage goes higher, the comparator output goes high, turns on the one shot which enables the LFO for a period of time.
I got stuck on how to dynamically change a voltage comparator to set the new threshold.
Anyway - an interesting puzzle. Anyone have any ideas?
Cheers!