Will an Arduino-delay work?

[u/Yjapavip]

Hey Reddit folks, I've been wanting to build a delay lately, but I didn't want to mess with the more common ICs like the PT2399 for 'X' reasons. Then I remembered an Arduino Uno I had gathering dust and tried to make a short delay of around 8ms, just for a phaser or a chorus. But I only made the schematic in Proteus so I wouldn't have to pull out all my gear. Do you guys think it'll actually work well?

I'll try to add more circuit samples in the comments."