Be careful not to accidentally cut other traces (or yourself!). You must cut the ground traces as shown in the photo with a razor blade or similar. Left connects to pin 1 (the square pad), the middle pin (2) is ground and pin 3 is the Right input. If you no longer want to use the input jack, you can just connect to the P1 header alongside the input jack. O2 INPUT JACK CONNECTIONS: There are two options for connecting the ODAC to the O2. Note the grounds are together (click for larger if desired): The photo below shows the twisted pairs connected to the ODAC output header. You can also use small shielded wire but it might be harder to “route” within the O2 enclosure. ODAC TO O2 WIRING: Use twisted pair wiring, such as you can find inside any CAT5 ethernet cable or similar. I’m still hoping to have at least a preliminary ODA design published before the end of summer. And, beyond that, look for the next ODA article. But it’s hopefully coming Real Soon Now… Really! Honest! There’s also the final large ODAC article with the rest of the measurements and more tech background on the design. It’s been my most daunting article yet and I’ve only had limited free time. WHAT’S NEXT: I’m still working on my Timex vs Rolex article. Hopefully, if I can publish articles more frequently to spread out the comments, you won’t have to worry about it. As long as you see either of those links, there are newer comments not being shown. It’s not perfect, and sometimes doesn’t work with Internet Explorer or mobile browsers, but clicking the “ Load More…” or “ Loading…” link at the end of the comments should load at least some of the newer posts. More on that in the next ODAC article.Ģ00 COMMENT LIMIT: With some help from friendly blog readers I’ve found a work around for the 200 comment limit. SCHEMATIC: YoYoDyne has received approval from Tenor to release the schematic once. If you don’t have either source powered up you may hear some hum and/or noise due to the floating input. When you unplug the jack the O2 will switch to the ODAC. When a jack (say from a portable player) is plugged into the jack the O2 will disconnect the ODAC and play the external source. O2 + ODAC: As previously discussed, when combined with the O2 and wired to the input jack as shown in the Tech Section below, you can still use the line input jack of the O2. You need some sort of headphone amp like the O2 (the ODAC fits inside), the upcoming ODA, a FiiO E5/E6/E9/E11, etc. ODAC CANNOT DRIVE HEADPHONES DIRECTLY: There still seems to some confusion the ODAC is a headphone DAC by itself.
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