From 740f1504e2bb4b994aa4f5abeefe633d5a0a0386 Mon Sep 17 00:00:00 2001 From: Skip Hansen Date: Mon, 19 Feb 2024 10:51:58 -0800 Subject: [PATCH] Created Chroma 74 (markdown) --- Chroma-74.md | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Chroma-74.md diff --git a/Chroma-74.md b/Chroma-74.md new file mode 100644 index 0000000..1bcd066 --- /dev/null +++ b/Chroma-74.md @@ -0,0 +1,37 @@ +## Status + +This tag is not supported by OpenEPaper link yet, but ports are in progress. + +## Specs +* TI CC1110 - 26Mhz 8051 32kB Flash / 4kB RAM +* 6.4 x 3.5 in ePaper display (BWR or BWY) 640x384px +* 1Mbyte SPI flash +* 6x CR2450 button cell +* SubGhz (868 Mhz / 915 Mhz) Radio + + + +## History + +This was one of the tags reverse engineered by [Dmitry Grinberg](https://dmitry.gr/?r=05.Projects&proj=29.%20eInk%20Price%20Tags) who's code is the basis of the OpenEPaperLink project. + +This tag has been somewhat readily available for some time and multiple DIY projects have used it successfully. + +At the moment (Feb 2024) the tag is still available from multiple vendors on ebay. + +Several of ads have been active for several months and ads with higher asking prices for multiple years. + +Even the higher priced units aren't completely outrageous ($44) but are close to the price of a new display from Waveshare. + +This tag is no longer in production, it was replaced by the Chroma 74 H+ which has a higher resolution screen and a more modern SOC. + +From outward appearances the old and tags are identical. + + + + + + + + +