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| Building a Penny Pusher Arcade Game |
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| vtsteam:
One more thought Chris, and others could probably correct or amplify this, I think you will need a certain minimum amount of current draw on that 5 volt line to keep the power supply healthy. LEDs are usually pretty efficient. And if you use low power ones, and not very many, there might not be enough current draw between them to be a good "dummy" load. Incandescent bulbs on the other hand tend to be more wasteful, and draw more current, which in this case is maybe a good thing. Whichever you choose, try to draw enough current to equal what the usual dummy load resistor is on these conversions. Perhaps someone else can suggest a reasonable current draw minimum. |
| raynerd:
It is a good point since I expect when I initially want to test the supply on the motor I won't have any LEDs at all. I'll load the 5v line as I usually do with a resistor initially. Just got back out of the workshop and very chuffed. I know it seems insignificant but I've been having a hell of a job sourcing some tiny slides. It isn't critical enough to use proper linear slides and bearings and too pricy. I've wanted to use a ball bearing draw slide but they are too long. Went to BQ earlier and there was one lone 12" slide, too big for me but it wasnt in a packet of a pair. Decided to ask if they would sell it me and they asked for £3!! I've spent many many thousands over the year but I have never walked out thinking I'd got a good buy ..... A first time for everything. Anyway, I chopped it in half tonight. Stripped all the 3 segments apart, ground off any stops, removed the bearings, removed and disposed of the outer extension (telescopic 3 section and I only needed 2 sections), cut it in half and re-assembled. Two really neat, mini slides! |
| mattinker:
Chris, I thought you might be interested in these :- http://uk.farnell.com/hamlin/59140-010/sensor-magnetic-spst/dp/1839038?Ntt=59140-010 They are magnetic switches, when approached by a magnet, the switch closes, they are very easy to set up when compared with mechanical limit switches. They will switch a relay or light diodes. Given as 10watts at a maximum of 200 volts they are pretty flexible. Regards, Matthew |
| raynerd:
Hey Matt, they do look interesting, do you have a specific use in mind with relation to this project. Got a moving table. It will need to be rebuilt as the link arm is too long and wasting far too much space. |
| awemawson:
Chris, Have you considered the not insignificant weight of a table of pennies or 2p pieces? The frictional load will be quite a bit I suspect as it pushes forwards. The actual movement of the pusher is somewhat less than on your prototype. Don't forget that when the pennies tip over the edge in the commercial machine, a portion of the 'haul' is split off by a divider so the punter only gets about 75% of what falls - the remainder re-circulates. Andrew |
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