Parts may of course be replaced by functionally compatible ones, for example use a fork lift relais for the main power relais (relais & fuses are no special parts). Blazej Blaszczyk has built his [prototype](Prototype-Blazej.md) without using Renault parts. For details please contact him at <blazej.blaszczyk@pascal-engineering.com>.
- The `296740718R` signal connector is Yazaki part no. [7282-8854-30](http://connectors-catalog.sys.yzk.co.jp/yazaki-web/servlet/SubServlet_e?forward=7282-8854-30&plist=detail&select=XX) (contact terminals sold separate).
- The `296743399R` main power connector is DELPHI part no. [F473110](http://ecat.delphi.com/feature?search=F473110), with contact terminals [F176600](http://ecat.delphi.com/feature?search=F176600).
- The `296746418R` charger power connector is DELPHI part no. [F873110](ecat.delphi.com/feature?search=F873110), with contact terminals [15516298](http://ecat.delphi.com/feature?search=15516298).
**Note**: if you plan to use **Pascals integrated Twizy BMS**, you won't need an Arduino. The integrated BMS also implements the Twizy protocol.
For a basic setup you'll need an Arduino, a CAN interface and a relais to switch the 3MW signal.
Standard Arduinos can be powered from 12V, but will burn the voltage difference (convert to heat), so a step-down voltage regulator is highly recommended. The [Pololu A-Star SV series](https://www.pololu.com/category/149/a-star-programmable-controllers) has on-board step-down regulators suitable for a 12V supply.
Using an Arduino Uno style main board with shields reduces soldering requirements but needs more money and space than for example a Nano based board with break out components.
Keep in mind for all setups, this is an automotive application: expect high levels of mechanical stress due to road shocks and temperature expansion/contraction. Protect your electronics against humidity.
**Price note**: there are lots of cheap Arduino clones available. These can of course be used as well. Expect a lower build quality, so better order some spares (always a good idea).
