I have a thought about an alternate approach to lamp dimming, but I want to investigate it first in the isolated, low power DC realm. Here is the basic idea. Vin can be anything from +160 Vdc to -160 Vdc, and shares a common ground with the control circuit. The power MOSFET is oversized to handle the peak voltage and max load current. The 4017 clock has no timing relationship the load or the load power. Note: ignore the MOSFET internal diode for this thought experiment.
The intent is for the 4017 and dipswitch to form a crude PWM:
Switch 1 only on = 33%
Switch 2 only on = 67%
Switch 3 only on = 100% (ignore reset signal race)
Again ignoring the MOSFET internal diode, any serious problems with this concept?
Thanks.
ak
The intent is for the 4017 and dipswitch to form a crude PWM:
Switch 1 only on = 33%
Switch 2 only on = 67%
Switch 3 only on = 100% (ignore reset signal race)
Again ignoring the MOSFET internal diode, any serious problems with this concept?
Thanks.
ak