Archiving old project

this is a project to control the electronic bi modal valve controllers in the vf commodore using arduino.
it uses 10v PWM at 200hz to control the valve state

I just went with a simple momentary switch to toggle the valves but you could use a remote relay or you could add a Bluetooth module to the Arduino project and use a mobile phone to toggle the valves.

depending on the parts you use it will cost anywhere between $60 to $100.

I used a nano board in the project

I used a fuse tap to get 12v ignition switched power from the fusebox above the battery

there is a unused bung under the battery tray that can be used to run the wires for the valve controllers

in the box

top

bottom

bench test

Needed parts:
1x https://www.jaycar.com.au/duinotech-nano-board-arduino-compatible/p/XC4414 - $29.95
1x https://www.jaycar.com.au/1k-ohm-0-5-watt-metal-film-resistors-pack-of-8/p/RR0572 - $0.55
1x https://www.jaycar.com.au/1-5k-ohm-0-5-watt-metal-film-resistors-pack-of-8/p/RR0576 - $0.55
1x https://www.jaycar.com.au/10k-ohm-0-5-watt-metal-film-resistors-pack-of-8/p/RR0596 - $0.55
1x https://www.jaycar.com.au/7812-12v-1a-voltage-regulator-to-220/p/ZV1512 - $1.85
1x https://www.jaycar.com.au/bc639-npn-transistor/p/ZT2179 - $0.95
1x https://www.jaycar.com.au/double-mini-blade-fuse-socket-wire-tap/p/SF5125 - $4.95

you can use any "momentary" switch you like
1x https://www.jaycar.com.au/ip67-rated-dome-pushbutton-switch-black/p/SP0656 - $4.95

Total for needed parts: $44.30

Optional parts:
1x https://www.jaycar.com.au/bulkhead-black-88-x-69-x-33mm/p/HB6075 - $3.75
2x https://www.jaycar.com.au/small-breadboard-layout-prototyping-board/p/HP9570 - $4.95
2x https://www.jaycar.com.au/2-way-pcb-mount-screw-terminals-5mm-pitch/p/HM3172 - $1.20

Total for all parts i used: $60.35

this total does not include the wire, you can source that pretty much anywhere you like used or new.

Plugs for controllers
if you want plugs for the valve controllers you can get these ones that john revill linked from aliexpress
according to the listing there are 4pcs in the lot so you will get 4 plugs in the one purchase.

1x: https://www.aliexpress.com/item/4pcs-lot-5-Pin-Way-Nitrox-Sensor-Plug-Mass-Air-Flow-Sensor-Meter-MAF-Connector-Socket/32850617234.html - $21.40

Total for all parts i used including the plugs: $81.75