Commodore 16 RAM expansion
5 August 2022
Ping-o-Tronic
20 August 2022
Another pong?
Yes, but this time it is different .. this fairly dated pong has a very stripped down control board, there is no real modulator, everything is generated in this PCB.
How can we do if we wanted to take out the composite signal? follow this guide and you will find out.
Let's see how it is made inside, from what we can see there is very little.
The power supply is integrated on the board, then we have an integrated that manages the game and the I / O signals, the RF signal is generated by an integrated circuit and the circuitry with coils and capacitors.
The audio signal can be taken directly on the integrated, the video, however, like other cases, must be amplified.
The integrated that takes care of everything is the MM57100N and this is a similar scheme (not of this console) that could come in handy. Unlike the console above, the schematic below has composite output but not RF.
What if we try to add what's missing on our console?
The classic modifications used on Atari, Intellivision are not good due to the particular power supply of this console, in fact here we work in negative with a voltage of -15V.
I recovered the NJM456D operational amplifier and made the circuit you see above, using pin 6 (video).
Above you can see the modification made on a millefori and connected as the diagram above.
The result was perfect, now this pong also has a composite exit !!
If you want to see its realization, don't miss this video
