The very popular 595 shift register chip of the 74 series is used a lot by hobbyis because of its wide availability, good speed and simplicity. Just plug it on an arduino like shown in the tutorials and youi have 8 more outputs, put two and you have 16 more outputs ! (up to a lot of them actually, with only three pins !)
This is the official current Arduino board, top quality, made in Italy and with a Zero Carbon Footprint!Arduino UNO Rev 3 ( R3 )The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power...
This a well designed, Arduino compatible mobile robot development platform,you can build it and program it easily with tons of published free codes. Compare with the last mobile platform, this one has a tough aluminium body with mounting holes, you can add Variety of sensors to make it more interesting.
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