1. NE555 Pulse Generator and PWM adjustable circuit.
D1, D2 : 1N4148.
Clock, t = 0.69((R1+VR1)*C1)+0.69((VR1+R2)*C1)
Pwm, Hi duty = 0.69((R1+VR1(①②))*C1)
Pwm, Lo duty = 0.69((VR1(②③)+R2)*C1)
The Circuit.
2. NE555 Variable Frequency Square Wave Generator.
If you only using square wave function without PWM control then you can shorted pin 1,3.
3. NE555 Square Wave With PWM Control.
If you only using the PWM control then you can shorted pin 2,3.
4. The circuit of NE555 50% duty cycle.
5. NE555 Transistors Drivers for Relay And Motor.
6. NE555 N ch Mosfet Drivers for Relay And Motor.
7. An small old antique NE555 oscillator without PCB built it about 30 years ago.
If you want to see all the details, please visit The Completed Projects forum.
D1, D2 : 1N4148.
Clock, t = 0.69((R1+VR1)*C1)+0.69((VR1+R2)*C1)
Pwm, Hi duty = 0.69((R1+VR1(①②))*C1)
Pwm, Lo duty = 0.69((VR1(②③)+R2)*C1)
The Circuit.
2. NE555 Variable Frequency Square Wave Generator.
If you only using square wave function without PWM control then you can shorted pin 1,3.
3. NE555 Square Wave With PWM Control.
If you only using the PWM control then you can shorted pin 2,3.
4. The circuit of NE555 50% duty cycle.
5. NE555 Transistors Drivers for Relay And Motor.
6. NE555 N ch Mosfet Drivers for Relay And Motor.
7. An small old antique NE555 oscillator without PCB built it about 30 years ago.
If you want to see all the details, please visit The Completed Projects forum.
