Hi Everyone,
I am trying to simulate the following astable 555 timer circuit in KiCAD.
I am using the attached (TLC555.zip) TLC555 timer model.
TLC555.zip (731 Bytes)
Rather than the expected square wave output, I am receiving the following, erratic, waveform from the output (pin 3):
The waveform generated by the charge time of the timing capacitor is also wonky:
I’ve also tried simulating this outside of KiCAD (in ngspice) with the same results.
The TLC555 model works for the following monostable configuration:
With the following output (pin 3):
Thank you in advance for any help that you can give me.
Tim