Hello there!

Here is my first post. I am trying to work this schematic. I am using the 4093 chip. I tried to built 2 oscillators but it's not possible the operation. It doesn't start, not works. Please, anyone can to help me with it.

http://fluxmonkey.com/electronoize/4093_Oscillator.htm

all the best
Javier

 

Hello,

How is your set-up?
Is it also on a breadboard?
Can you post a picture of the set-up?

Bertus

 

The breadboard examples is wrong, missing resistors, etc..

To calculate the output frequency is fo = 0.8/RC...

Search more for Schimidt Trigger.

Best regards.

 

Hello,

How is your set-up?
Is it also on a breadboard?
Can you post a picture of the set-up?

Bertus

Hello! Thanks for your reply. Attached are some images. I hope that it can be ok.

 

What a messy tangle of wires all over the place! How can you see which connects to what?
What is your output, an LED or an amplifier?

The Fluxmonkey article shows that the red thing in the breadboard is a resistor standing up.

 

The author says:

Like last week, it’s easiest if you build one oscillator at a time, make sure it’s working, and then adding it to the chain.

Did you?

 

Attached are some images.

How about a schematic?

 

How about a schematic?

http://fluxmonkey.com/electronoize/4093Oscillator_files/image003.jpg

 

http://fluxmonkey.com/electronoize/4093Oscillator_files/image003.jpg

I'd call that a cartoon.

Here's a schematic of what the cartoon depicts.

It can't work.

I see two pots in your pictures, so the cartoon isn't what you wired. It would be helpful if you posted a schematic for what you wired.

 

NO. The red thing on the demo breadboard circuit is said to be a resistor standing up, they say try 100k, not an LED.
With a 100k resistor and a 0.01uF capacitor then the RC makes an audio tone into the input of an audio amplifier (not a speaker) and it will not be powerful enough to feed an LED.

 

I'd call that a cartoon.

Here's a schematic of what the cartoon depicts.
View attachment 207122
It can't work.

I see two pots in your pictures, so the cartoon isn't what you wired. It would be helpful if you posted a schematic for what you wired.

I understand the meaning that I use 2 pots. The main reason is because, the first one doesn't work so, I was looking if, it's a problem in some place if, I work the 2nd oscillator. It was not possible withe first too.

 

NO. The red thing on the demo breadboard circuit is said to be a resistor standing up, they say try 100k, not an LED.
With a 100k resistor and a 0.01uF capacitor then the RC makes an audio tone into the input of an audio amplifier (not a speaker) and it will not be powerful enough to feed an LED.

Yes, I tried with a potentiometer that's the same that a resistor but, it doesn't work.

 

NO. The red thing on the demo breadboard circuit is said to be a resistor standing up, they say try 100k, not an LED.
With a 100k resistor and a 0.01uF capacitor then the RC makes an audio tone into the input of an audio amplifier (not a speaker) and it will not be powerful enough to feed an LED.

What's the difference in to start to work the audio between an amplifier and a speaker?

 

When I do breadboard protos, the wire to use is solid single core from an old bit of telecom cable. Ethernet cable works well too.
Then trim the wires to fit, so it is easier to trace.
Here is an example I just tossed together.
And, if you phone has a Macro setting on the camera, use that for better close ups.


By the way, this flashes the LED.

 

What's the difference in to start to work the audio between an amplifier and a speaker?

A CD40xx IC has a low output current of about 15mA when it is powered from 9V. Then it can produce 5V to a 333 ohm load because 5V/15mA= 333 ohms. The input resistance of an amplifier is thousands of ohms so it works fine.
Now see how much output voltage the 15mA will produce in an 8 ohm speaker: 15mA x 8 ohms= 0.12V which is not enough voltage to let the oscillator work.

 

View attachment 207124
By the way, this flashes the LED.

It looks very neat and tidy but we cannot see your resistor and capacitor values.

 

A CD40xx IC has a low output current of about 15mA when it is powered from 9V. Then it can produce 5V to a 333 ohm load because 5V/15mA= 333 ohms. The input resistance of an amplifier is thousands of ohms so it works fine.
Now see how much output voltage the 15mA will produce in an 8 ohm speaker: 15mA x 8 ohms= 0.12V which is not enough voltage to let the oscillator work.

Thanks a lot really, you had reason with it. It works now. Just I would like to add a volume + a kind of simple effect. Could you to help me with a schematic?

 

It looks very neat and tidy but we cannot see your resistor and capacitor values.

It's solved but, I need to add some kind of effect to it.

 

Sure looks like an LED to me. Note how the right side has a "flat" edge. They were detailed enough to show the bare wire ends. You'd think they could show a wire coming out of the top of a resistor that was standing up.


My advice would be to never trust a circuit from someone who draws cartoons.

 

It looks very neat and tidy but we cannot see your resistor and capacitor values.

Yes, that it so.
But it is just a demo.
The blue cap on the supply is a 100nF.
The LED resistor, lying down is a 2K2.
The vertical resistor is 1M
The Tant timing cap is 10uF.