{"id":756,"date":"2015-03-03T02:01:02","date_gmt":"2015-03-03T02:01:02","guid":{"rendered":"http:\/\/blogs.discovery.wisc.edu\/projects\/?p=756"},"modified":"2015-03-03T02:13:41","modified_gmt":"2015-03-03T02:13:41","slug":"322015-teb-update","status":"publish","type":"post","link":"https:\/\/blogs.discovery.wisc.edu\/projects\/2015\/03\/03\/322015-teb-update\/","title":{"rendered":"3\/2\/2015 TEB Update"},"content":{"rendered":"

What I accomplished this week<\/strong><\/p>\n

All my time this week was spent solving the electrical issue that was causing a\u00a0short circuit (actually very high resistance, but not infinite) which prevented the circuit from functioning properly. \u00a0After spending a few hours with Professor Kevin Ponto\u00a0analyzing and testing different subsystems of the circuit, we identified that the issue was coming from the H-Bridge section of the circuitry. I checked my design twice and verified that there weren’t any problems with it. This meant that there was an error when populating the board.<\/p>\n

What I found was that I mixed up the location of two transistors when populating the board. There was a P-channel where an N-channel was supposed to be and vice verse. \u00a0 I then removed and swapped the transistors and sure enough, everything is working perfectly now.<\/p>\n

See the image below for more details.<\/p>\n

Next week’s work<\/b><\/p>\n

I would like to finish writing and testing the code out on my board. \u00a0The reason I have to write new code for this iteration is because I modified the PCB design so that the buttons are now connected to the external interrupts on the microcontroller. \u00a0This should help eliminate the delay issues (when the buttons were pressed) I was having with my first iteration.<\/p>\n

\"1_30_2015<\/a>

The transistors in the white boxes were the root of my issues. I had one N-channel and one P-channel in each box, this enabled current to flow directly from power to ground. Q2 and Q3 in the left box should be two P-channel transistors and Q1 and Q4 in the right box should be two N-channel transistors<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

What I accomplished this week All my time this week was spent solving the electrical issue that was causing a\u00a0short circuit (actually very high resistance, but not infinite) which prevented the circuit from functioning properly. \u00a0After spending a few hours … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":101,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,33],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/posts\/756"}],"collection":[{"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/users\/101"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/comments?post=756"}],"version-history":[{"count":4,"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/posts\/756\/revisions"}],"predecessor-version":[{"id":761,"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/posts\/756\/revisions\/761"}],"wp:attachment":[{"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/media?parent=756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/categories?post=756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.discovery.wisc.edu\/projects\/wp-json\/wp\/v2\/tags?post=756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}