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Pic16f1829 , push pull (180 phase shift same duty cycle for both output, no duty cycle invert cycle by cycle) pin details below and function 1, vcc 5v (on switch) 2, fan MOSFET gate signal 3, 10k NTC tie with 5v ground resistor 10k and 100nf pf . 50c fan speed is half 50c -80c full speed above 90c engage fault and run fan 100% 4, mclr ground with 100nf pf 5, 25khz push PWM closed loop with pin 14 adjust duty cycle according to output keep stable voltage max duty cycle 45% 6. 25khz pull PWM 180 phase shift output of pin 5 same duty cycle no invert out . Closed loop with pin 14 max DUTY CYCLE 45% 7, on ok green led signal 8, 190khz 50% fixed duty cycle no distrub perfect and clean 9. Nc 10, fault led signal . pin14 95v fail continuous on, temperature fail twice blink break repeat, 3 b...