Vermes
Advanced Member level 4
The machine is constructed on base of the clone of Nintendo (similar to Pegasus). The choice was not accidental, because a plate with plenty of chips present very well. Also, consoles like that have much clearer picture. The picture is displayed by 5 inch colour tv set. Everything is powered by transformer power supply, which originally was for the tv set.
Pictures taken before installing the console module:
The module with LED displays is a driver on Attiny2313 (program written in BASCOM). Its work is displaying time to end of the game after throwing a coin. '8888' appears on the displays and pad (a panel of buttons for playing) doesn't work after starting. D0 line from pad is unplugged from motherboard of the console. After throwing a coin into the hole (black hole under the buttons panel), relay shorts D0 line between the pad and the console. Then playing is allowed. It counts 5 minutes. After that time, the driver unplugs D0 line once again and controlling the game is unavailable. Once again, '8888' appears on the display. There is a possibility to throw a coin once again, but there is also another way to start the game. In the side of the housing, there is a lock. Its bolt pushes the movable switch element, which activates the option FULL. Subscription 'FULL' appears on the display, the driver starts and you can play.
Detector of coins is a switch, to which a piece of cardboard reinforced with hot glue is attached. A coin falling turns it on for a short moment. Money is removed by unscrewing the three large bolts from the container for the coins.
Pictures of the device inside:
Pictures of the displays:
Machine isn't used for hazard! This is only a model – a toy!
Link to original thread (useful attachment) – Automat do grania typu Arcade Game