{"id":39,"date":"2012-10-10T14:26:00","date_gmt":"2012-10-10T13:26:00","guid":{"rendered":"https:\/\/blog.hslracing.com\/3dprinters\/2012\/10\/10\/panelolu\/"},"modified":"2012-10-10T14:26:00","modified_gmt":"2012-10-10T13:26:00","slug":"panelolu","status":"publish","type":"post","link":"https:\/\/blog.hslracing.com\/3dprinters\/2012\/10\/panelolu.html","title":{"rendered":"Panelolu"},"content":{"rendered":"

I was having a look at the various Panelolu<\/a> designs.<\/p>\n

<\/a><\/div>\n

More specifically at how to wire one up at the Think3dPrint3d<\/a> website and decided that I needed to have a go at simplifying the wiring for use with an I2C connected LCD.

<\/span>I am not using an <\/span>SDSL<\/a> per se, but an off the shelf Micro SD card reader that is a fraction of the cost (\u00a35.84 vs \u00a313.20 inc P&P)<\/span><\/p>\n

<\/a><\/div>\n


<\/span>This could potentially be done even cheaper with a standard SD card reader that can be had for about \u00a31.14 from <\/span>Ebay<\/a>. <\/span><\/p>\n

<\/a><\/div>\n
If I believe I can use just 12 pins for all of the panel connectivity. If I use a couple of Dupont 2×3 connectors, then the other pins will still be available for any other uses that may come along, as they can stack side by side.<\/div>\n
<\/a><\/div>\n
The great thing about Dupont connectors is that they are easy to change pinouts – just lift the flap that holds the pin in place, pull out the pin and move it to another slot. If you have any cables with single ends, 1×2, 1×4, 1×6 ends, you can easily change it to a different configuration if you have the appropriate connector or simply want to change the arrangement of pins from one end to the other to quickly make a custom cable.<\/div>\n
<\/div>\n
Typical prices for Dupont pins and connectors – all prices from Ebay<\/a>. <\/div>\n
<\/div>\n
100 x female pins \u00a31.90<\/div>\n
100 x male pins \u00a32.25<\/div>\n
100 x 1×2 pin connectors \u00a31.63<\/div>\n
100 x 1×3 pin connectors \u00a31.63<\/div>\n
100 x 1×4 pin connectors \u00a32.25<\/div>\n
100 x 1×6 pin connectors \u00a32.25<\/div>\n
100 x 2×3 pin connectors \u00a32.32<\/div>\n
40 x 1 pin female – 1 pin female wires \u00a31.21<\/div>\n
<\/div>\n
I use a ratchet crimper with replaceable jaws, but you can just as easily use a pair of needle nose pliers instead.<\/div>\n
<\/div>\n
Here is the Schematic I mocked up, you will see that the PCF8574P<\/a> chip handles all of the connectivity to the LCD.<\/div>\n
<\/a><\/div>\n
I intend to use 90 degree header pins on the LCD panel and some 1×6 Dupont connectors, connection to the Micro SD board is again 90 degree header pins, a 1×6 Dupont and a 1 pin Dupont or 1×3 pin and 1×4 pin (as I need 7 pins) – total cost of connectors (3 x 1×6 connector, 1 x 1×1 connector, 2 x 2×3 connector, 30 x male pins) is about \u00a30.80, with another \u00a30.08 for 90 degree header pins.<\/div>\n
<\/div>\n
Encoder – \u00a36.19 for 10, Pots – \u00a31.41 for 10, switch – \u00a30.08, 2004 LCD – \u00a34.24 and some perfboard.<\/div>\n
<\/div>\n
If you can make do with a 1602 LCD, these can be had for \u00a31.34.<\/div>\n
<\/div>\n
So total parts cost for I2C Panel about \u00a32.60 (includes cost of PCF8574P<\/a>) , then add either Micro SD or standard SD, 2004 or 1602 LCD, and price varies from about \u00a35.00 (standard SD and 1602) to \u00a312.50 (micro SD and 2004) all in.<\/div>\n
<\/div>\n
OK, the STL file for the panel may also need a little tweaking for my internals, but overall should be pretty simple to do.<\/div>\n


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

I was having a look at the various Panelolu designs. More specifically at how to wire one up at the Think3dPrint3d website and decided that I needed to have a go at simplifying the wiring for use with an I2C connected LCD.I am not using an SDSL per se, but an off the shelf Micro SD card…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-39","post","type-post","status-publish","format-standard","hentry","category-uncategorised"],"_links":{"self":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/comments?post=39"}],"version-history":[{"count":0,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts\/39\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/media?parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/categories?post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/tags?post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}