So far, it doesn't look like you've "made" anything, you've only simulated something. Which simulator are you using. Look at the circle data points in the blue "triangle data". They appear to be making a sine wave. Did your simulator just cram the triangle wave into fit the pattern of data points? Is your 555 signal higher frequency than the iteration steps of simulator? Try bumping up the frequency (shortening the interval) of the simulator's steps.I have made a triangle wave from 555 square wave. Below are circuit and simulation.
View attachment 249333
View attachment 249334
You get the rectangular wave from the comparatorI cannot take out 555 because I need the rectangular wave too.
The simulation is Pspice.It you want a true triangle wave, you can generate that with two op amps.
What frequency do you want?
I've tried various triangle wave circuits over the years and this version is by far the best. Be careful if you use this with your LM358 with its cross-over distortion, you'll get a weird glitch at the inversion of each triangle point.Below is the LTspice simulation of a square-triangular generator using two rail-rail op amps:
View attachment 249379
NOTE: this circuit posted immediately above by LowQcab DOES NOT produce a triangle wave. It is simply a wave that charges and discharges a capacitor without constant current control. It looks more like a shark-fin (almost a triangle). If that is good enough for your application, fine. If not, use an appropriate circuit.
If You will expand the Picture You will find the formula forThe fist circuit in post #1 produced 550Hz.
The second circuit in post #6 produced 98Hz.
The third circuit in post #12 produces 2kHz.
Why does the circuit in post #16 produce ultrasonic 32.5kHz?
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by Jake Hertz
by Lianne Frith