armless bandit

7-64 elektor july/august 1980 1 4,5 ... 6 V 4,5 ... 6 V R2 R3 0 4,5 ... 6 V CI R 4,5 ... 6 V . For most of us, giving money away is very easy, all that is required is a car! For many others the odds need to be a little shorter. They use a "one armed bandit", or "fruit machine", or "three in a row", or "jackpot". Call it what you will they all do the same job — part you from your money. A number of rolling drums induce a hypnotic trance in the victim reducing his number of movements to two, inserting coins with the left hand and pulling a lever with the right with only one known surefire cure — atmospheric pockets! Yes, we know that they pay out because the person before you proved it (and so will the one following you). With this circuit it is possible to work out the sequence all day long without touching a single coin. We have even taken out the all too familiar ache in the right arm. It operates with a total of 27 LEDs in three rows of nine. It might be advisable to mount t...