Inside a casino slot-machine topper (top sign)
bigclivedotcom 10:18
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This is a game sign for the top of a casino slot machine. It's a standard unit supplied by SuzoHapp a significant manufacturer of components and spares for the maintenance of gaming equipment.
The PDF manual they have for this unit seems to show the schematic and layout of a different version of this PCB. The component I was puzzled about is a MC33164 voltage monitoring chip to make sure the processor resets cleanly if there is a power issue. Especially important with multiplexed LEDs, since a crashed processor can leave one section of the matrix lit with higher current than normal.
At first when I saw the PCB I thought that the system was direct driving the LEDs using the ULN2803A drivers for 16 pairs of LEDs. I was surprised to find they had an 8X4 multiplexed array.
The button on the PCB is used to select the LED intensity and also whether they are continuously on or off. (on/off modes only on software V1.5 and higher.)
If you wish to browse the website of SuzoHapp (not a sponsor) then you can find it here:-
https://www.suzohapp.com/
The user guide with schematic for this topper is here:-
https://na.suzohapp.com/pdf/topper_pdf/xenon/104-07890manual.pdf
This type of topper is still listed on their website, complete with fluorescent tube.
Apparently the LEDs that light at power up do indicate the software version. In this case, one LED at the left (1) and three LEDs at the right (3). So the software version is V1.3.
Other things worthy of note. The 12V feed to the PCB has one wire going through a ferrite inductor and the fluorescent tube has a high value inductor across it. Both probably for electrical noise suppression.
If you enjoy my videos then the easiest way to support the channel is to subscribe for more good video content. But if you would like to contribute a dollar or two for coffee, cookies and gadgets to take apart, you can do so by supporting me on Patreon. I release videos without adverts for critique and feedback on Patreon as soon as they have been made. I also do Patreon live streams, which are much more relaxed and chatty than the busy public ones.
https://www.patreon.com/bigclive
Alternatively, for a single coffee contribution you can use PayPal:-
https://www.paypal.com/paypalme/bigclive
#ElectronicsCreators
The PDF manual they have for this unit seems to show the schematic and layout of a different version of this PCB. The component I was puzzled about is a MC33164 voltage monitoring chip to make sure the processor resets cleanly if there is a power issue. Especially important with multiplexed LEDs, since a crashed processor can leave one section of the matrix lit with higher current than normal.
At first when I saw the PCB I thought that the system was direct driving the LEDs using the ULN2803A drivers for 16 pairs of LEDs. I was surprised to find they had an 8X4 multiplexed array.
The button on the PCB is used to select the LED intensity and also whether they are continuously on or off. (on/off modes only on software V1.5 and higher.)
If you wish to browse the website of SuzoHapp (not a sponsor) then you can find it here:-
https://www.suzohapp.com/
The user guide with schematic for this topper is here:-
https://na.suzohapp.com/pdf/topper_pdf/xenon/104-07890manual.pdf
This type of topper is still listed on their website, complete with fluorescent tube.
Apparently the LEDs that light at power up do indicate the software version. In this case, one LED at the left (1) and three LEDs at the right (3). So the software version is V1.3.
Other things worthy of note. The 12V feed to the PCB has one wire going through a ferrite inductor and the fluorescent tube has a high value inductor across it. Both probably for electrical noise suppression.
If you enjoy my videos then the easiest way to support the channel is to subscribe for more good video content. But if you would like to contribute a dollar or two for coffee, cookies and gadgets to take apart, you can do so by supporting me on Patreon. I release videos without adverts for critique and feedback on Patreon as soon as they have been made. I also do Patreon live streams, which are much more relaxed and chatty than the busy public ones.
https://www.patreon.com/bigclive
Alternatively, for a single coffee contribution you can use PayPal:-
https://www.paypal.com/paypalme/bigclive
#ElectronicsCreators
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