I've just finished building the Pendulum Tremolo and I'm pleased to say that it worked right off the hop!
Other than gobs of level (unity gain is about 9 O'clock on the volume pot), the first thing I noticed, is that the frequency range is too wide for my tastes. Boomy lows and way too much extension in the HF compared to bypassed tone. I tried bending both of the LDRs farther away from the LEDs which helped a bunch and the lows flattened out nicely, but the HF response was still too much. One of the product reviews mentioned changing the LPF cap from 6n8 to 22n, to lessen the tone shift and it worked really well. So...now the frequency response is much better, but it seems that I've lost some depth. On a side note, unity gain is closer to 11 O'clock, which I do prefer.
Could someone please help me understand the relationship between the amount of light hitting the LDR and the depth?
Does a wider frequency range add more perceived depth?
Would changing the HPF cap value to raise the cutoff frequency and then moving that LDR back, closer to the LED give me more depth while keeping a tighter overall LF response?
Other than gobs of level (unity gain is about 9 O'clock on the volume pot), the first thing I noticed, is that the frequency range is too wide for my tastes. Boomy lows and way too much extension in the HF compared to bypassed tone. I tried bending both of the LDRs farther away from the LEDs which helped a bunch and the lows flattened out nicely, but the HF response was still too much. One of the product reviews mentioned changing the LPF cap from 6n8 to 22n, to lessen the tone shift and it worked really well. So...now the frequency response is much better, but it seems that I've lost some depth. On a side note, unity gain is closer to 11 O'clock, which I do prefer.
Could someone please help me understand the relationship between the amount of light hitting the LDR and the depth?
Does a wider frequency range add more perceived depth?
Would changing the HPF cap value to raise the cutoff frequency and then moving that LDR back, closer to the LED give me more depth while keeping a tighter overall LF response?
Last edited: