Erector sets used to be all metal, used screws & nuts to hold it together, later little hex-head screws & nuts. Stuff I saw recently was all plastic!
They show the circuit diagram needed to hook up to a smart servo - and the communication protocol is laid out nicely. It should be very straightforward to create a library - if someone else hasn't already done so. The servos and LEDs only need a 5 volt supply - a simple Uno would be a fine starting point; you'd have to experiment with how many you can daisy chain off a single I/O pin on the Arduino (that, or measure the current consumption for the servo data line, then divide that into 20 or 30). Likely you could use a couple of pins on the Arduino and control at least 4 of the servos daisy chained.
Actually there is this arduino library offered by meccano: http://www.meccano.com/meccanoid-opensource
And im stuck LOL what is the trick to see whats in it .. ? i mean hoe do i retrieve to code ?
i cant program from scratch ... i need the original code and from there i will try and error
Also .. what is the difference between the motor ? the 20$ upgrade one is not the same as the original ?
I'm pretty sure you can't take advantage of the Arduino's UART to communicate with the servos.
The bits of Smart Module data bytes are about 1.1ms long. Each byte has a start bit that is~2ms LOW. There is no stop bit.Unlike the bits from the MeccaBrain™ which are just HIGH and LOW for 1 and 0, the bitsfrom the Smart Modules are based on high pulse widths. A "1" bit is when a High pulse is> 400ms; a "0" bit is when the High pulse is < 400ms.
Well, this shouldn't really be a problem if you are using Meccano-Erector parts for the mechanical hardware.