I built a basic astable circuit for the 555 and I'm using an oscilloscope to view the output.

I know this IC is supposed to output a square wave but instead I get these slopes (I don't know what to call them) in the wave. Is there a way I can get better waveforms out of the circuits like putting more capacitors or others?

enter image description here

with ac coupled you mean that switch?

this is the calibration signal from the scope, this has a more square shape

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    \$\begingroup\$ What is the load, what is your exact circuit, how have you configured the scope (AC coupled?) have you tuned the scopeprobe \$\endgroup\$ – JonRB Mar 3 at 19:39
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    \$\begingroup\$ If you're just putting a scope probe on pin 3 of the 555 and there's no load, the scope is probably AC coupled. If that's not the case, then post your schematic, and post a picture of the control panel of your scope. \$\endgroup\$ – TimWescott Mar 3 at 19:41
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    \$\begingroup\$ Your scope is AC coupled. Put it in DC mode. \$\endgroup\$ – Hearth Mar 3 at 19:48
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    \$\begingroup\$ @NicoPerez now that your question is answered, this would be an excellent chance to write your first answer – to your own post! That way, the question can be marked as "solved", and future people with the same problem see prominently how to solve it. A single sentence answer suffices. \$\endgroup\$ – Marcus Müller Mar 3 at 21:03

The scope was AC coupled. I changed it to DC and I got an almost perfect squarewave.


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