Hi
This is a cct from a forum known as "quoro" , the claim was that with two tweaks of this cct you could vary the duty cycle but maintain frequency!!
https://www.allaboutcircuits.com/uploads/thumbnails/astable-555-circuit.png?v=1452314372856
The pot was 2kohms and C was 10 nanofarads , Vcc was 9 volts.
Any chance this can work with a few more tweaks?
Best regards
This is a cct from a forum known as "quoro" , the claim was that with two tweaks of this cct you could vary the duty cycle but maintain frequency!!
https://www.allaboutcircuits.com/uploads/thumbnails/astable-555-circuit.png?v=1452314372856
- Make the R1 and R2 the resistance of a single pot with fixed value (R1+R2), but with a sliding tap. Pin 7 will be connected to that slider tap.
- Next, Fix a diode like 1N4001 between the pins 7 and 6( or 2) pointing downwards.
The pot was 2kohms and C was 10 nanofarads , Vcc was 9 volts.
Any chance this can work with a few more tweaks?
Best regards