555 triangle-wave generator

200

01:58:06

This is possible by using transistors as constant current source, this way the capacitor will charge and discharge in a linear way creating the wave.
Changing the capacitor value will change the frequency.
The OpAmp is there just to buffer the output to allow removing the DC offset, you can use the output directly if you want for some reason..

Anyway, the wave have a distortion at the peak because the current isn't constant all the way. I reduced this effect by injecting voltage at the CTRL pin, but this doesn't fix it.

published 8 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.