Im having problems using the LM317 current limiter configuration. Im tryin to input a squarewave (fig a) and im assuming that a squarewave (fig b) should be the output having the same amplitude and frequency, provided that i don't exceed the current limit that Ive set for the LM317 circuit. The problem is that the output always becomes fig c it still has the same frequency and amplitude but a small squarewave/pulse always appear on its off cycle on the output. What should i do to have this small squarewave/pulse removed. Thanks in advance
Ive tried to input a sawtooth waveform basically having the same frequency and amplitude the output was fine works fine without unwanted oscillation at all.
i tnk it is due to the capacitor sitting at the out put.that may discharge when out put is low.this will not happense if u r giving saw tooth as input.plz check it out.
regards sabu
i used lm317 as to create a 3.3V output... but instead of having 3.3V output it created a more or less 1.2V output. I'm pretty sure that i used the right value for r1(240ohms) and r2(400ohms). my input voltage is 12V. I tried to change the value of the resistor, still the output is 1..2V. what might be the problem?