From fd16c0acf3841f18aa5ac78186b81f32ef70e5e6 Mon Sep 17 00:00:00 2001 From: Ray Jones Date: Fri, 11 Jan 2019 02:50:23 +0000 Subject: [PATCH] Update Hardware design files --- Hardware-design-files.md | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Hardware-design-files.md b/Hardware-design-files.md index d1fa008..2e2b750 100644 --- a/Hardware-design-files.md +++ b/Hardware-design-files.md @@ -2,12 +2,18 @@ [DieselHeater.pdf](uploads/fdae5fae2f96549175ded789e84dc991/DieselHeater.pdf) -**NOTE:** +### NOTE: The schematic shows an I2C EEPROM. This is not presently supported but was added to the production board as it makes no difference to the board production, and may be handy in the future. As such, this can be omitted from the build. Non volatile storage is achieved using the "persistent" class available in the ESP32 software suite (uses FLASH memory). +### DS3231 +The most cost effective way to source a DS3231 RTC is to obtain a DS3231 Real Time Clock Module For Raspberry Pi from eBay, then use a hot air gun to remove the chip from the module. +As a bonus it comes with a free battery! +The V1 PCB is not designed to take this battery directly, but it could be used as shown in the following image, if some of the solder mask is scraped away to expose the earthy copper: +Battery + ## Gerber & NC drill design files [BTCheater.zip](uploads/1390e8b392675d0606f3917f847d874c/BTCheater.zip)