During a recent impulse-buy at DealExtreme I added the following two items to my cart:<\/p>\n
I intended to just play around with it, with no particular purpose in mind. However, I’ve recently been asked to bake up a clock-like display, and figured I could use these two for that purpose. This post will be the first in a series detailing what I’m doing with it, and how I’ve done so. The first post will focus on what the boards contain, where to get information, and a small summary of some of my plans.<\/p>\n
First the JY-MCU 3208 Lattice Clock. Basically it’s just a little development board that comes out of the box with:<\/p>\n
Apart from that it comes with solder-pads for a lot more components that you can solder on manually:<\/p>\n
The factory firmware is basically a clock, but it’s highly inaccurate, and loses it’s time whenever it loses power. Even though it’s a nice demo, I think the real power of this board comes from the fact that you can write your own firmware and the PCB contains traces and solder-pads for virtually anything you’d want to make with a 32×8 display like this. Out of the box you could use it to receive data from the UART TX\/RX pins and put that on the screen, which would make a nice display for something like an arduino, if you add extra components you could make a clock, a USB display, thermometer, or anything else you can come up with that uses a combination of the things listed above.<\/p>\n
This one is a bit simpler. Out of the box, it’s just 4 4-digit 8-segment displays with a TM1640 chip to drive them. However, here too there’s room for more!<\/p>\n
There’s solder-pads available for something like an ATTiny25\/45\/85 chip, with the option of removing two resistors so the TM1640 is connected to 2 output pins of the ATTiny, and the normal DIN and SCLK inputs will then wire to the ATTiny’s DI\/DO pins, allowing for something like serial communication.<\/p>\n
On top of that it allows you to place two push buttons directly wired to the ATTiny in case you’d like to run it standalone.<\/p>\n
Stand-alone it’s nice for a display on any microcontroller\/arduino project. With the ATTiny, you can write up an easier protocol, or even have it running as a standalone display.<\/p>\n
My current plan is to create a clock, with the LM1640 used as an extra display to show, for example, the year, month, and day. I also plan to add an USB option so that you can synchronize the time with a computer, and possibly use the displays directly from the PC.<\/p>\n
For this I’ll be adding the DS1302 RTC chip, and adding all the needed components for a USB connection.<\/p>\n
The next post will feature all the datasheets and other manuals I can find, and will detail how I’d like to wire things up, what components I’ll be needing \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
During a recent impulse-buy at DealExtreme I added the following two items to my cart: A 32×8 LED Clock thingie (JY-MCU 3208 Lattice Clock) http:\/\/dx.com\/p\/jy-mcu-3208-lattice-clock-ht1632c-driver-with-mcu-support-secondary-development-104306?item=1\u00a0(SKU 104306) A 16-digit 8-segment LED display (JY-MCU JY-LM1640) http:\/\/dx.com\/p\/jy-mcu-16x-digital-tube-yellow-led-module-104311?item=3\u00a0(SKU 104311) I intended to just play around with it, with no particular purpose in mind. However, I’ve recently been asked to … Continue reading Turning a JY-MCU 3208 into something useful<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[45,43,44],"class_list":["post-143","post","type-post","status-publish","format-standard","hentry","category-electronics","tag-45","tag-43","tag-jy-mcu"],"_links":{"self":[{"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=\/wp\/v2\/posts\/143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=143"}],"version-history":[{"count":4,"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=\/wp\/v2\/posts\/143\/revisions"}],"predecessor-version":[{"id":147,"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=\/wp\/v2\/posts\/143\/revisions\/147"}],"wp:attachment":[{"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fw.hardijzer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}