{"action":"created","issue":{"url":"https://api.github.com/repos/heatseeknyc/hardware/issues/1","labels_url":"https://api.github.com/repos/heatseeknyc/hardware/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/heatseeknyc/hardware/issues/1/comments","events_url":"https://api.github.com/repos/heatseeknyc/hardware/issues/1/events","html_url":"https://github.com/heatseeknyc/hardware/pull/1","id":120320775,"number":1,"title":"Doodles from @raphaelabrams","user":{"login":"williamcodes","id":4542879,"avatar_url":"https://avatars.githubusercontent.com/u/4542879?v=3","gravatar_id":"","url":"https://api.github.com/users/williamcodes","html_url":"https://github.com/williamcodes","followers_url":"https://api.github.com/users/williamcodes/followers","following_url":"https://api.github.com/users/williamcodes/following{/other_user}","gists_url":"https://api.github.com/users/williamcodes/gists{/gist_id}","starred_url":"https://api.github.com/users/williamcodes/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/williamcodes/subscriptions","organizations_url":"https://api.github.com/users/williamcodes/orgs","repos_url":"https://api.github.com/users/williamcodes/repos","events_url":"https://api.github.com/users/williamcodes/events{/privacy}","received_events_url":"https://api.github.com/users/williamcodes/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-12-04T02:50:46Z","updated_at":"2015-12-04T04:52:56Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/heatseeknyc/hardware/pulls/1","html_url":"https://github.com/heatseeknyc/hardware/pull/1","diff_url":"https://github.com/heatseeknyc/hardware/pull/1.diff","patch_url":"https://github.com/heatseeknyc/hardware/pull/1.patch"},"body":"- Simplify the power supply rail to a star\r\n- Strengthen the ground plane\r\n- Add several decoupling capacitors\r\n\r\nTake these changes or leave them, they are just doodles from @raphaelabrams, the engineer behind goTenna. Raphael recommends looking at digital temperature sensors to further reduce noise. Putting a second or third type of sensor onto the board just in case the first one doesn't work out could be a good insurance policy and would allow us to experiment with multiple sensors without printing more boards."},"comment":{"url":"https://api.github.com/repos/heatseeknyc/hardware/issues/comments/161876641","html_url":"https://github.com/heatseeknyc/hardware/pull/1#issuecomment-161876641","issue_url":"https://api.github.com/repos/heatseeknyc/hardware/issues/1","id":161876641,"user":{"login":"williamcodes","id":4542879,"avatar_url":"https://avatars.githubusercontent.com/u/4542879?v=3","gravatar_id":"","url":"https://api.github.com/users/williamcodes","html_url":"https://github.com/williamcodes","followers_url":"https://api.github.com/users/williamcodes/followers","following_url":"https://api.github.com/users/williamcodes/following{/other_user}","gists_url":"https://api.github.com/users/williamcodes/gists{/gist_id}","starred_url":"https://api.github.com/users/williamcodes/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/williamcodes/subscriptions","organizations_url":"https://api.github.com/users/williamcodes/orgs","repos_url":"https://api.github.com/users/williamcodes/repos","events_url":"https://api.github.com/users/williamcodes/events{/privacy}","received_events_url":"https://api.github.com/users/williamcodes/received_events","type":"User","site_admin":false},"created_at":"2015-12-04T04:52:56Z","updated_at":"2015-12-04T04:52:56Z","body":"Yes, all the vias are there to strengthen the ground plane and reduce noise. He said they're more effective the larger they are, but in some instances there wasn't room so he made them smaller. \r\n\r\nOh, he did other things that I didn't mention. He moved some things closer together to reduce the distance the signal had to travel through traces to reduce noise. He increased the size of the traces to reduce resistance and used the miter tool to round their edges. Apparently 90 degree angles are verboten for traces because the angle gets eaten into by the etchant during the wash and becomes narrower than you planned. In some cases it can cause the trace to short, although our traces are probably too wide for that to be a problem. He also tried to make the labels clearer by increasing the font size and positioning them in places that made it unambiguous what they were referring to.\r\n\r\nHe recommended we try out tempoautomation.com for production. Apparently you just send them an eagle file and they order parts, print the boards, assemble them, and ship them in 3 days, all for not much more than Advanced charges, and they might give us a discount if we name drop him. I'm gonna call them tomorrow. I'll also email Raphael your question about using digital sensors with xbees."}}