ArdynoMon

After some external interest (thank you) I've been nudged into refreshing this page.  
I still get a bit lost with KiCAD files so if I've missed one from the upload, let me know.  
Amusingly, I have recently used it to check th timing of a minimal EVSE (EV charger) I've built.  

Significant updated coming shortly to address the following issues with this version:  
I accepted a subtitution of the transistors without realising that they have a different pinout.  
The RX going through the level shifter prevents in-situ programming.  
Better to choose the regulator on the Arduino *OR* the one on ArdynoMon shield, but not both!  
Both 1-Wire busses need a power pin as passive power is not always wanted.  

- drop A4 & A5 reducing on-board analogue inputs from 6 to 4.  
+ frees I2C to go with UART & SPI  
+ accept 1-wire digital temperature sensors (both 5V & 3.3V) bus powered or not  
+ accept trigger from coil primary. Option for lo-V (5-12V COP) or hi-V (400V CDI/IDI)  
+ accept trigger from 12V (& 5V) Hall effect sensors with suitable protection. Rising or Falling edge    
+ option for VR conditioner / Opto-isolator plug-in board  
	E.g. in addition to coil primary trigger for measuring dwell time  
+ gives 2 digital I/Os for PWM, servo, Dir+Step, analogue output etc.
	E.g. PWM eddie current brake & servo throttle  
	E.g. foot-switch to trigger logging time-stamp 'way-point'  
+ better use of coastline with 3-pin 90-degree pin headers, can also use IDC ribbon cable connectors  
+ all key signals are 3V & 5V  
+ replace 555 timing C & R with 1nF (as close as poss) & 1k + optional 2M trim-pot for variable pulse width  
+ put LED on output of 555 to aid diagnosing pick-ups which use it  
= wider audience, upgradable, inline with YourDyno  

+ uSD/TF on SPI, sharable with other SPI devices
+ ambient humidity, air pressure, temperature on I2C  
+ RTC on I2C  
+ jumper option with resistor divider to measure vehicle battery voltage
= fully integrated logger (not just ArdynoMon) better than existing one. Can share SPI, doesn't use analogue pins  

drive individually addressable RGB LEDs for rev-counter & other indicators etc.
serial logging via Bluetooth or WiFi module. On pigtails to get out of Faraday cage  
current sensor on COP to find required dwell time - to one of the analogue inputs  
RS485 bus for multi-drop peripheral/controller  
1-wire: DS18b20, K-type thermocouple amplifiers, battery monitor  
I2C: 24-bit ADC strain-guage amplifier, IMU  
SPI: CAN bus?
published (push-pull buffered) sync pulse from conditioned signal. For tacho, etc. (crank & cycle)  
can drive high power COB LEDs via MOSFET for simple ignition strobe light