Hello everyone,
I am new, and I am trying to get started with a simple astable 555 circuit. I am trying to generate seven different frequencies (square wave pulse, 20% duty cycle): 73 Hz, 146 Hz, 292 Hz, 584 Hz, 1168 Hz, 2336 Hz, 4672 Hz. I am keeping R1 at a constant 1k Ohms.
The R2 and C values are:
(73 Hz) R2: 9,383.6 Ohms, C: 1.0 uF
(146 Hz) R2: 10,014.41 Ohms, C: .47 uF
(292 Hz) R2: 10,731.33 Ohms, C: .22 uF
(584 Hz) R2: 5,677.23 Ohms, C: 0.1 uF
(1168 Hz) R2: 12,643.05 Ohms, C: 0.047 uF
(2336 Hz) R2: 13,539.162 Ohms, C: 0.022 uF
(4672 Hz) R2: 14,943.08 Ohms, C: 0.01 uF
When I run these values through any of the online 555 calculator websites, they seem to give me what I am looking for. I read that I will have to use diode between R1 and R2 to go below a 50% duty cycle:
My question is: what brand, voltage rating, type of capacitors should I use for this project?
The same question for the diode and the resistors. Should I use a multi-turn trimmer potentiometer?
I was thinking of building this circuit run on a regulated 5 volt supply. My goal is to then feed the Output (pin 3) into an LC circuit and create sinewaves at these frequencies. My only goal after that is to step up the voltage through a transformer for more power.
If any of this seems tenable to you all, could you please help me with buying components, as I am so new to this.
Thank you for your time.
I am new, and I am trying to get started with a simple astable 555 circuit. I am trying to generate seven different frequencies (square wave pulse, 20% duty cycle): 73 Hz, 146 Hz, 292 Hz, 584 Hz, 1168 Hz, 2336 Hz, 4672 Hz. I am keeping R1 at a constant 1k Ohms.
The R2 and C values are:
(73 Hz) R2: 9,383.6 Ohms, C: 1.0 uF
(146 Hz) R2: 10,014.41 Ohms, C: .47 uF
(292 Hz) R2: 10,731.33 Ohms, C: .22 uF
(584 Hz) R2: 5,677.23 Ohms, C: 0.1 uF
(1168 Hz) R2: 12,643.05 Ohms, C: 0.047 uF
(2336 Hz) R2: 13,539.162 Ohms, C: 0.022 uF
(4672 Hz) R2: 14,943.08 Ohms, C: 0.01 uF
When I run these values through any of the online 555 calculator websites, they seem to give me what I am looking for. I read that I will have to use diode between R1 and R2 to go below a 50% duty cycle:
My question is: what brand, voltage rating, type of capacitors should I use for this project?
The same question for the diode and the resistors. Should I use a multi-turn trimmer potentiometer?
I was thinking of building this circuit run on a regulated 5 volt supply. My goal is to then feed the Output (pin 3) into an LC circuit and create sinewaves at these frequencies. My only goal after that is to step up the voltage through a transformer for more power.
If any of this seems tenable to you all, could you please help me with buying components, as I am so new to this.
Thank you for your time.