The automatic coin dispenser is driven by a servo. Perfect for vending machines, a prize system, etc. I have used an Arduino Nano to act as an I2C slave but you could use anything. Unfortunately, the maximum size of the coin allowable is ~22mm without major design changes.

###Hardware required: MG92B (Strong micro servo) 2 M2x8 (To mount servo) 2 M2x6 (To mount tip) 5 M3x6 (To mount cover) TCRT5000 IR sensor (Low coin level detector) Arduino Nano or similar

###Source code for Arduino

###Currently tested with coins: Singapore new 10C (18.50 mm x 1.38 mm) Singapore new 20C (21 mm x 1.72 mm)

###Experimental (Not tested) Euro 10C (19.75 mm x 1.93 mm) Euro 20C (22.25 mm x 2.14 mm)

###New DIN rail mounting is now released. The tip has been upgraded to loop design to prevent jams.

###Future A parametric generator in Fusion360 will be available soon... V4 will have a better cover and mounting for the cover.