Fuzzbox, Distortion, Phaser, Chorus, Echo and other Guitar Effects Info

I have revised the page with the LED resistor calculator by adding a chart below the calculator with forward voltage measurements of selected LEDs. You will see on the chart that the red, green and yellow voltage drops are all similar while the other LEDs have a higher Vf.

I was surprised that the pink’s voltage was so high as I thought it was a modified red, but it turns out that it is apparently more closely related to the blue and white devices.

The UV is also a modified blue, as would be expected. I did not have an infrared pair to test but if I find some I will add them to the chart.

Update: I have modified the calculator so that it is more versatile. Enter the current at which the LED is to operate and the calculator will find the resistor value. Alternately, you can leave the LED current field empty and the calculator will report the milliamps being used by the LED. The Voltage Supply and LED forward voltage values must always be entered into the form.

I have revised the R-C filter calculator in the Lab Notebook so that it can work out the value of any of the 3 parameters if you input the other two. For example, enter the resistor and capacitor values and it will tell you the cutoff frequency, or put in the resistor value and the frequency that you want, and it will calculate what capacitor to use.