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A new video has just been published. It demonstrates all the possibilities of WiFlip's supervision mode applied to RECEL System 3 pinball machines. See it on :
WiFlip Supervisor
RS3CLN is an exact replica of the original Recel system III MPU which is used in several Recel pinballs from the 70’s. Dimensions, connections, timings are totally indistinguishable. To make it work in a Recel pinball, just disconnect the 3 connectors (PC, MA, MB) from the old MPU and unmount it from the metallic backbone (unscrew the plastic spacers and the power transistors). Then, mount the RS3CLN replacement board in the same way, with the spacers, and reconnect the 3 connectors., PC, MA, MB. That’s it.
When the CPU of a Gottlieb System 1 doesn't start at all even though the clocks signals are good, it's often worth looking at the PO reset signal (TC1 pin 14) . In fact, the SCL4528BE monostable may be out of order or a surrounding component may be causing the reset duration to be too short.
Under 30ms, a PPS4 won't start properly. However, when you're looking to replace the SCL4528BE, which you can hardly find anymore, you may come across a TC4528, an MC14528B or a CD14528B that are pin-to-pin compatible.
But beware!
In fact, the f(Rx, Cx) timings are very different from one IC to another, and so instead of generating a 300ms reset, it creates a reset of only 30ms.
It turns out that the correct replacement for the SCL4528BE is the CD14538BE and not the CD14528B as might have been expected.
Good news! They are available in DIL 16 from Farnell, for example.
We've created an Android app that lets you connect a pinball machine to your smartphone over WiFi. All you need is a PPS-4 clone.
On the smartphone, you can read the 24 configuration dip switches, keep track of the program running on the pinball machine or watch the scores and other information being displayed in real time.