Yep! Schottky diode. See this thread on selecting an appropriate one. https://budgetlightforum.com/t/-/34123
As for size, iirc its SOD-323. But any size that fits can work.
Thanks for sharing the schematic. I came across that in my search but I’m a bit unlearned as of yet and was hoping for something that mapped it’s way through all of the components (even the duplicates like the 7135s) and especially the AK-47A vs the 105C.
Something more akin to the color photo from the tutorial would be most helpful.
Edit: I also came across the second photo you posted. I guess I was hoping for some combination of the two but I suppose I’ll need to roll up my sleeves a bit and fill in some blanks.
Is the schematic understandable, as far as showing how parts connect to the attiny? I mean, I know it uses component symbols instead of actually labeling everything. Are you familiar with all the symbols there (diode, capacitor, resistor and ground)?
The off time capacitor is connected between ground and pin 2.
With the ak47 the attiny is oriented with the “reset” pin (pin 1) bottom left. So looking at the DrJones ak47 pic, you can follow the yellow line from R4 (labeled “3” in the pic) to pin 2 on the attiny. Schematic shows pin 2 is aka PB3 (when talking about firmware code).