zeke 693 Posted January 13, 2017 Share Posted January 13, 2017 Hi Everybody! I have eight or nine clock ring PCBs here that I am thinking of selling. This is what they look like with the LEDs installed: This is what they look like in operation: This is what they look like in operation when installed in the Ikea Clock: Purchase options: Bare board Bare board with LEDs and Ikea clock Populated board Populated board with Ikea clock Would anyone be interested in buying one of them? Quote Link to post Share on other sites
yyrkoon 250 Posted January 13, 2017 Share Posted January 13, 2017 @@zeke So *maybe*. I've actually been wanting to some RGB LED experimenting, for lighting purposes in my bedroom. Sunrise alarm clock and all that. But it really depends on the cost. Costs of the board, with LEDs, and cost of the board + LEDS populated. I must say that does look pretty cool ! EDIT: By the way total newb question here. What is "APA102" ? Quote Link to post Share on other sites
timotet 44 Posted January 24, 2017 Share Posted January 24, 2017 APA102 Serial addressable LED. https://cdn.sparkfun.com/datasheets/Components/LED/APA102C.pdf Quote Link to post Share on other sites
zeke 693 Posted January 27, 2017 Author Share Posted January 27, 2017 @@yyrkoon, Check out the linki @@timotet posted. The way I describe this LED is that it's an addressable RGB LED that uses a one way protocol SPI-like protocol. Each LED emitter inside the unit consumes up to 20mA of current for a grand total of about 60ma when the color White is commanded. The refresh speed appears to be quite quick - faster than the common WS2812 RGB LED anyways. I believe I have the SPI configured for an unrealisticly high speed of 8MHz and the LEDs are working, mostly. In my test code, the last LED's Red element glows slightly. I beleive if I were to slow down the SPI port then that artifact would go away. My motivation for making these rings was to push myself forward to learn new skills with Altium, MSP430s and to make a clock that my kids would enjoy having in their rooms. My motivation for offering these units for sale is to gauge the interest of you all in this technology. Not many people seem interested therefore I can conclude that this design is a dud i.e.: It's just a clock. I am considering a completely different kid friendly design using these LEDs where I will use a standard sized picture frame and install a single board matrix of APA102Cs that can display pretty much anything your creative mind can come up with. I'm still doing a feasability study on that design. Feel free to ask questions. yyrkoon 1 Quote Link to post Share on other sites
yyrkoon 250 Posted February 3, 2017 Share Posted February 3, 2017 @@yyrkoon, Check out the linki @@timotet posted. The way I describe this LED is that it's an addressable RGB LED that uses a one way protocol SPI-like protocol. Each LED emitter inside the unit consumes up to 20mA of current for a grand total of about 60ma when the color White is commanded. The refresh speed appears to be quite quick - faster than the common WS2812 RGB LED anyways. I believe I have the SPI configured for an unrealisticly high speed of 8MHz and the LEDs are working, mostly. In my test code, the last LED's Red element glows slightly. I beleive if I were to slow down the SPI port then that artifact would go away. My motivation for making these rings was to push myself forward to learn new skills with Altium, MSP430s and to make a clock that my kids would enjoy having in their rooms. My motivation for offering these units for sale is to gauge the interest of you all in this technology. Not many people seem interested therefore I can conclude that this design is a dud i.e.: It's just a clock. I am considering a completely different kid friendly design using these LEDs where I will use a standard sized picture frame and install a single board matrix of APA102Cs that can display pretty much anything your creative mind can come up with. I'm still doing a feasability study on that design. Feel free to ask questions. Yeah, this specific format isn't something that I'd need per se. I did look up APA102 a week or longer ago, and got the gist. Basically ws28xx "ish". I'm not exactly sure what I want really. For work, I do need something as a test system for GPIO indication. For this, a serial type LED would probably not be ideal. But for a personal type project, I want something, but don't know exactly what I want yet. Something I can control remotely, something that is RGBW, and then . . . I don't know. The remote bit could possibly be something like an ESP32( if they're out yet ) or of that nature. Then the actual control MCU, I'm not sure. Quote Link to post Share on other sites
Inscribe 0 Posted March 12, 2017 Share Posted March 12, 2017 Hi Zeke, Would you have any LED rings left? I would like to buy two populated ones (without clock) or maybe three if priced reasonably ;-) Thanks - Inscribe Quote Link to post Share on other sites
zeke 693 Posted March 18, 2017 Author Share Posted March 18, 2017 On 3/11/2017 at 9:55 PM, Inscribe said: Hi Zeke, Would you have any LED rings left? I would like to buy two populated ones (without clock) or maybe three if priced reasonably ;-) Thanks - Inscribe Hi Inscribe. I have all of them still. I will figure out a price and let you know. Quote Link to post Share on other sites
ijeoc 0 Posted July 6, 2017 Share Posted July 6, 2017 Hi, I would be potentially interested in buying a couple depending on the cost as well, Could you pm me? Cheers! Quote Link to post Share on other sites
pololu 0 Posted October 9, 2018 Share Posted October 9, 2018 hmmm...pretty cool...can you use APA107 to make this ring? to reduce the cost....so all of us can afford it ....👀 I saw the APA107 is same with APA102, made in China, not from Taiwan, this is the datasheets: https://www.element14.com/community/servlet/JiveServlet/previewBody/87739-102-4-376328/APA107 RGB.pdf Quote Link to post Share on other sites
zeke 693 Posted October 9, 2018 Author Share Posted October 9, 2018 As mentioned in your other post, yes, it appears that the APA107 is a drop in replacement for the APA102 LED. APA107_RGB.pdf Quote Link to post Share on other sites
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