So, the interesting little ESP8266 WiFi SoC finally has a younger brother which appears to be even more capable. Among other expansive updates, the 32 bit Dual Core microcontroller still supports WiFi, but also Bluetooth Low Energy, a DAC, many more ADCs, GPIO pins, etc. etc. Lots of good details here: http://esp32.net/
After the bearing failure on my MR2 Turbo, 3SGTE, I’ve been investigating bearing failures.
There are a couple of very good guides which provide an example of a number of different bearing failure modes.
MAHLE / Clevite bearing failure analysis: http://www.wilmink.nl/Clevite/Clevite_lagerschade_tech_info.pdf
More examples after the break
After dismantling my 3SGTE, we found that all of the bearings had picked up and one big end had spun completely and ripped the bearing in half. Most of them looked like this:
The crank was also scored and I suspect the con rod with the spun bearing my have gone oval too.
I have just bought another ESP8266/NodeMCU development board cheapy from eBay (this one) with an ESP-12E chip on board. I’ve also bought an SPI-CAN bus interface with the common Microchip MCP2515 CAN controller to try and create a CAN-Wifi gateway.
Last summer I bought a 1992 MR2 Turbo – it’s fun to drive, and fast. However, while driving home from work one day, I suffered from some horrible knocking noise from the engine. When I pulled over and stopped, the engine seized solid. So I’m now planning on removing the engine and fixing it.
Here’s some videos:
I had real trouble finding a suitable alternative oxygen/lambda probe for my 1992 Rev 2 MR2 Turbo. I can’t find the original Denso part number at the moment, but I managed to find that a Denso DOX-0107 fits the flange size correctly and is 1-wire, it just requires soldering to the original connector. It’s got a Flange 44 type flange which apparently matches the 3SGTE.
I got it from http://service-parts.co.uk/denso-oxygen-sensor-dox-0107
So a friend told me about the Duke Axial Engine the other day. It’s certainly a very interested idea and does produce some clever solutions to some of the fundamental complexities and disadvantages to the reciprocating internal combustion engine. I always like the idea of novel engine designs, and this one certainly looks like it has potential. Take a look at the video followed by some analysis after the break.
After receiving my ESP8266 Development/breakout board I have been attempting to create a WiFi enabled thermostat to control my central heating from my mobile phone and give me a means of timer programming my central heating. To be a true thermostat requires a temperature sensor. The ESP8266 board came with a DHT11 sensor and already has pins directly compatible with one. I therefore just required the software to interface with it.
ESP8266 Flasher Tool: https://github.com/nodemcu/nodemcu-flasher/blob/master/Win32/Release/ESP8266Flasher.exe
Latest nodeMCU firmware: https://github.com/nodemcu/nodemcu-firmware/blob/master/pre_build/latest/nodemcu_latest.bin
Benlo.com LuaLoader for NodeMCU files and ESP8266 configuration:
Simple ESP8266 GPIO Websserver:
ESP 8266 Development Board Schematic:
Write up of the ESP8266 Development Board: