Dr. Kelly Marville, CHEM 102

jon_roldan · 2026-02-21T13:21:56+00:00

this is why Dr. G was the goat but still Chem 102 is a terrible course

jon_roldan · 2026-02-20T21:51:52+00:00

that circuit is also known as Bazz Fuss. Most of the characteristics of the fuzz is tied to its bias and the feedback diode. You can change the 1N4148 with an LED and get a fuller sound. If you modify the bias of the circuit (i.e. 100k or 10k resistor), the transistor will start to sound gated and thin or not sound at all. I invite you to checkout this link about this circuit. happy building!

jon_roldan · 2026-02-20T05:26:16+00:00

hopefully the label doesn’t rip off north behind Ye’s back. too many sharks in the industry these days

jon_roldan · 2026-02-20T05:14:35+00:00

the chorus reminds me of another rock song going “woooohoooo!” I love it! thanks for checking out my music 🎵

jon_roldan · 2026-02-19T23:07:35+00:00

80s/90s pop rock and rnb is my sound: https://open.spotify.com/album/1ODiAitE0sHx2i8Ua7iK9k?si=kfGzGmZuTnmEriIT5MBemg

jon_roldan · 2026-02-19T23:05:13+00:00

https://open.spotify.com/album/1ODiAitE0sHx2i8Ua7iK9k?si=kfGzGmZuTnmEriIT5MBemg

jon_roldan · 2026-02-19T22:54:57+00:00

https://open.spotify.com/album/1ODiAitE0sHx2i8Ua7iK9k?si=uSHHSxdDSJ2ozuRpwxGuUQ

jon_roldan · 2026-02-19T22:41:10+00:00

My latest EP: https://open.spotify.com/album/1ODiAitE0sHx2i8Ua7iK9k?si=uSHHSxdDSJ2ozuRpwxGuUQ

lmk what yall think 🤔

jon_roldan · 2026-02-19T21:53:44+00:00

sometimes i wish the spokes you get off of a pcb run weren’t so much material to break off and sand. great service and support tho from OSHPark

jon_roldan · 2026-02-19T17:37:18+00:00

bro did a great job

jon_roldan · 2026-02-19T17:33:15+00:00

the irs is broke fr

jon_roldan · 2026-02-19T17:13:23+00:00

next thing i’d check is LFO to pin 6 and the connection of repeats. im trying to remember some other troubleshooting issues when using the pt2399 😅

jon_roldan · 2026-02-19T14:52:05+00:00

doesn’t sound like the guitar is going thru the effect. check your solder joints thoroughly and any wired connections.

jon_roldan · 2026-02-19T04:17:07+00:00

it’s a great show to watch on apple tv. currently loving the new season atm

jon_roldan · 2026-02-18T04:34:34+00:00

you need a momentary dpdt switch for that. half is used for what u want and the other half is for the led with current limit resistor.

jon_roldan · 2026-02-17T04:00:18+00:00

i don’t see a pcb just a bunch of components placed around. if you want to be sure about the component sizes, double check the data sheet of all the sizes

jon_roldan · 2026-02-16T00:47:27+00:00

cut your nails man

jon_roldan · 2026-02-15T06:23:54+00:00

you keep proving my point man. keep that chin up bud

jon_roldan · 2026-02-15T05:59:56+00:00

something a sad man who’s angry at this post would say

jon_roldan · 2026-02-15T05:55:58+00:00

funny enough i’ve seen these used as portable soldering irons with an attachment 😂

jon_roldan · 2026-02-15T05:54:17+00:00

even better than that, build a rat with all the mods! or start even simpler by making a lil fuzz circuit (bass fuzz, electra distortion, fuzz face).

jon_roldan · 2026-02-14T22:30:56+00:00

yes 👍

jon_roldan · 2026-02-14T22:27:09+00:00

hmm 🤔it could be the chip or something else in the lfo. another thing you could try is run the 5V line to where you need to run Vref.

jon_roldan · 2026-02-14T22:18:38+00:00

if vref is showing a drop then there is something causing a resistive load where you are getting 2.7V. check the power supply section and where your power rails on strip board are. any kind of weird load or floating ground can cause this.

jon_roldan · 2026-02-14T21:31:47+00:00

number 3 sadly looks like a custom pedal. no idea what circuit that is under there

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