{"id":47,"date":"2010-04-28T17:53:44","date_gmt":"2010-04-29T00:53:44","guid":{"rendered":"http:\/\/tubetime.us\/?p=47"},"modified":"2010-04-28T17:53:44","modified_gmt":"2010-04-29T00:53:44","slug":"iee-clock-internals","status":"publish","type":"post","link":"https:\/\/tubetime.us\/index.php\/2010\/04\/28\/iee-clock-internals\/","title":{"rendered":"IEE Clock Internals"},"content":{"rendered":"

Let’s take a look inside the previous posted IEE clock<\/a>:<\/p>\n

\"IEE<\/a><\/p>\n

Here you can see the laced wiring harness for the displays. This is not a multiplexed display–each of the 40 light bulbs has its own transistor driving it. All these wires come off the displays and into a very large DIN-style connector that plugs into the main circuit board. The ICs are all on the other side of the board.<\/p>\n

\"IEE<\/a><\/p>\n

This is a closeup of the main PCB. It’s quite small. You can see the PIC’s ICD header off on the right, along with a header that allows access to the I2C bus for troubleshooting.<\/p>\n

\"IEE<\/a><\/p>\n

And looking at the other side, we can see the driver ICs, the PIC, and the RTC device, along with some passives. You can also see the spare pads I put next to the PIC so that I can easily solder wires to the unused GPIOs if I ever need them.<\/p>\n

\"IEE<\/a><\/p>\n

Some people commented about the switch on the front. I have a decent collection of switches of all colors, types, and vintages. It’s disconcerting for me to see what would be a really neat project marred by boring switches. Here’s a small sampling of my collection:<\/p>\n

\"Switch<\/a><\/p>\n

People really liked the photos of the disassembled IEE module from the other website. Here are a few gratuitous “artsy” shots:<\/p>\n

\"IEE<\/a><\/p>\n

\"IEE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Let’s take a look inside the previous posted IEE clock: Here you can see the laced wiring harness for the displays. This is not a multiplexed display–each of the 40 light bulbs has its own transistor driving it. All these wires come off the displays and into a very large DIN-style connector that plugs into […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[3,5],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p80Z1r-L","_links":{"self":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/47"}],"collection":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/comments?post=47"}],"version-history":[{"count":0,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/47\/revisions"}],"wp:attachment":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/media?parent=47"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/categories?post=47"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/tags?post=47"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}