From 21220612b65432cf18402b1ca6ddc7aa15e5da5d Mon Sep 17 00:00:00 2001 From: Valery Rutkovskiy Date: Sat, 2 Jan 2021 07:17:31 +0000 Subject: [PATCH] docs: create boards/V01 --- ru/boards/V01.md | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 ru/boards/V01.md diff --git a/ru/boards/V01.md b/ru/boards/V01.md new file mode 100644 index 0000000..aa9a3be --- /dev/null +++ b/ru/boards/V01.md @@ -0,0 +1,45 @@ +--- +title: V01 +description: +published: true +date: 2021-01-02T07:17:22.886Z +tags: +editor: markdown +dateCreated: 2021-01-02T07:17:22.886Z +--- + +IMG_20151010_123440490_zpsqw2dla5a-sideways.jpg + +Overview +-------- + +The V0.1 board was the first hardware implementation and is not intended for general in car use. It does however drastically simplify testing on stationary engines. + +Layout +------ + +The board is a 2 sided 'shield' that is approximately the same width as an Arduino Mega, but extends out at both ends. It has I/O for all the main sensors as well as 4 channels each of ignition and fuel. + + +Populating the board +-------------------- + +The following components are needed to fully populate the board: + +- R1, R2, R3, R5, R7, R7 = 10k Ohm resistors +- R4, R6, R8, R9 = 1k Ohm resistors +- D1-D4 = Schottky diode (Eg 1N5819) +- C1-C4 = 100nF capacitors rated for at least 6V +- Q1-Q4 = TO220 nChannel MOSFETs (Eg STP62NS04Z). Other appropriate MOSFETs will work and maybe substituted but these should have clamping >30V and some protection built in. +- U1 = Opto-isolator (Eg CNY17-3). May or may not be needed depending on the type of crank sensor you are using. If your sensor outputs 0-5V directly, this can be left out and the sensor connected directly to digital pin 2 on the arduino + +Dev Notes +--------- + +The V0.1 board has several drawbacks and issues that are to be addressed for the next version. These include: + +- Lack of ground screw terminals. The board only has a single ground screw connector which must be shared by all sensors. This is less than ideal both physically and electrically. +- The use of an opto-isolator for the crank sensor is of debatable value. Most suitable hall sensors will output 0-5V signals and I'm not sure it's worth the extra cost/space to support 0-12V+ sensors as well. This leads to the next issue: +- No support for VR crank sensors. The next version of the board will either use a built in VR conditioner or will allow something such as \[the jbperf VR conditioner board\](http://jbperf.com/dual_VR/v2_1.html) to be plugged in if required +- No bias resistors onboard for the 2 temperature inputs (CLT and IAT). In order to standardise the voltage divider circuit, these should both have a 2490 Ohm resistor +- There is no fly back diode on the MOSFETs. Assumption for this board was that protected drivers would always be used, but the provision for a diode should be added for flexiblity.