Really want to give this pedal a go, but I've only got ne555 timers. Does anybody know if I can replace the tlc555 with ne555? Would it make much of a difference?
Quick research on the difference between the regular 555 and the CMOS version. When you engage the flip-flop on the 555 chip, there can be a power spike coming out of the chip on the regular 555. The TLC version has a much lower spike and better power dissipation than the standard 555 chip. Highly unlikely that you will damage anything but a standard 555 may end up making the whole circuit sound differently than it was designed to with the CMOS chip.
Also - given that the flip-flop function of the 555 comes out of pin 3, which here connects to the LDR, I'm going to theorize that a standard 555 may make the effect sound different. I can't imagine that the designer would have used a less common chip if it wasn't necessary. However - try it and see?
After a scant five years of doing this, I know just a little. Which is only slightly more than nothing. Which can often be far worse than nknowimg nothing at all, hah. See: Dunning-Kruger🤣
I think the reason why he chose the TLC555 to feed the LDR is because of a high input impedance, this device supports smaller timing capacitors than those supported by the NE555 or LM555. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power-supply voltage.
Awesome! thanks! will try it asap
ReplyDeleteTag this one Anders, pretty cool fuzz
ReplyDeleteThanks Ian!
DeleteTagged.
Really want to give this pedal a go, but I've only got ne555 timers. Does anybody know if I can replace the tlc555 with ne555? Would it make much of a difference?
ReplyDeleteQuick research on the difference between the regular 555 and the CMOS version. When you engage the flip-flop on the 555 chip, there can be a power spike coming out of the chip on the regular 555. The TLC version has a much lower spike and better power dissipation than the standard 555 chip. Highly unlikely that you will damage anything but a standard 555 may end up making the whole circuit sound differently than it was designed to with the CMOS chip.
DeleteAlso - given that the flip-flop function of the 555 comes out of pin 3, which here connects to the LDR, I'm going to theorize that a standard 555 may make the effect sound different. I can't imagine that the designer would have used a less common chip if it wasn't necessary. However - try it and see?
DeleteYou’re right, they’re both 555 timers, but they have different characteristics, so I’m sure they differ in performance, maybe he knows something?
ReplyDeleteAfter a scant five years of doing this, I know just a little. Which is only slightly more than nothing. Which can often be far worse than nknowimg nothing at all, hah. See: Dunning-Kruger🤣
ReplyDeleteI think the reason why he chose the TLC555 to feed the LDR is because of a high input impedance, this device supports smaller timing capacitors than those supported by the NE555 or LM555. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power-supply voltage.
ReplyDelete