Actually looking again at the schematic I see four toggle switches, which at a glance appear to be in H-bridge formation. That would suggest you can use a dual motor driver. Rewire the VW one: 12V input is fine; add two resistors to the output - 2k2 and 1k5, then the GND on the 1k5 and the mid point of the two to the analog input of the Arduino. Maybe add a resistor between the mid point and the analog input for protection against spikes; 4k7 - 10k would be a good value here. would be a good value for the pull-down. For accuracy you want it to be roughly halfway the range of the resistor values you want to measure, for current limiting you want it as high as possible. This value will limit the current to ~3 mA for the lowest value of the switch, which is comfortable. and Shroud (You will need pulley, tensioner and belt as they are missing). Collection only.Update - Possibly Bergman Kit -

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Parts Emporium VW Volkswagen Used Aircooled Spares and Cars in the UK. Beetle Bus Buggy Camper Cabrio Splitty Split Bay Transporter Volkswagon T3 T4 Parts Emporium VW Volkswagen Used Aircooled Spares in the UK Bug Beetle Camper Buggy T3 Parts Emporium - Used Type 2 VW Camper bus bay split splitty microbus t25 wedge Parts for sale Parts Emporium - VW wheels volkswagen used tyres Parts Emporium - VW Beetle Parts For Sale volkswagen bug buggy type 1 t1 Some info is here - http://www.thesamba.com/vw/archives/manuals/Bosch_Tune_Up_Parts/Bosch_Tune_Up_Parts.pdf if (R2 > 626 && R2 < 909) {digitalWrite(in1, LOW); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, LOW); digitalWrite(in5, LOW); digitalWrite(in6, LOW); digitalWrite(in7, LOW); digitalWrite(in8, LOW); }

const uint8_t IN_PIN[] = {3, 4, 5, 6, 7, 8, 9, 10}; // Remember: computers start counting at 0, so your in1 is IN_PIN[0]. if (R2 > 966 && R2 < 1029) {digitalWrite(in1, LOW); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, LOW); digitalWrite(in5, LOW); digitalWrite(in6, LOW); digitalWrite(in7, LOW); digitalWrite(in8, LOW); } accessory, The other side just sold on the samba - https://www.thesamba.com/vw/classifieds/detail.php?id=2168803if (R2 > 1051 && R2 < 1179) {digitalWrite(in1, LOW); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, LOW); digitalWrite(in5, LOW); digitalWrite(in6, LOW); digitalWrite(in7, LOW); digitalWrite(in8, LOW); } if (R2 > 1196 && R2 < 1000000) {digitalWrite(in1, LOW); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, LOW); digitalWrite(in5, LOW); digitalWrite(in6, LOW); digitalWrite(in7, LOW); digitalWrite(in8, LOW); } Then the 5V of the Arduino would go to the original 12V side of the switch; original GND of the switches to the analog inputs, resistor from analog input to Arduino GND. That makes for a regular voltage divider.

It is not mentioned in the schematic, but those "illumination" LEDs should have a current limiting resistor of sorts. You may be able to replace those resistors with a lower value and run the LEDs themselves off 5V. Otherwise it may be possible to simply replace the LEDs themselves for a set of your own, with appropriate resistor for 5V supply. if (R2 > 0 && R2 < 529) {digitalWrite(in1, LOW); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, LOW); digitalWrite(in5, LOW); digitalWrite(in6, LOW); digitalWrite(in7, LOW); digitalWrite(in8, LOW); }raw= analogRead(analogPin); if(raw) {buffer= raw * Vin; Vout= (buffer)/1024.0; buffer= (Vin/Vout) -1; R2= R1 * buffer; Serial.print("Vout: "); Serial.println(Vout); Serial.print("R2: "); Serial.println(R2); delay(50);