First of all, Hi, I haven't been here in ages... Secondly, I'm planning to create an interface circuit, so I can connect my old Amiga joysticks to the PC joystick port. The major problem that I face, is converting the digital outputs of teh joystick into the analogue signal that the computer uses. For those of you that aren't familiar, the signal that's used isn't technically an analogue voltage signal. The code required to process such a signal would be very complicated. Instead, it's a simple RC charging network. The joystick axis is a 100k variable resistor, with one end connected to the +5V line, and the other end connects to the capacitor inside the computer. It then measures the time needed to charge the capacitor above a certain level, and uses that to determine the position of the joystick. So, here is the circuit that I'm planning to use: The weird green things are one quarter of a 4016, which connects the top and bottom inputs to each other when the side input is logic 1. What is supposed to happen, is that at it's normal state, the 2 100k resistors are connected in paralell, giving a resistance of 50k. When you move the joystick up, it disconnects the second resistor, making the resistance 100k. And when you move it down, it connects the 1k resistor as well, and drops the resistance to around that level. My question is: Can anyone see any potential problems with this?
www.google.com is the first port of call. Look seriously google will answer this after all it taught me how to wire my C=64 joystick, Playstation joystick and N64 pad all to the pc and more.
I looked a while ago, so I know that idea is correct. I'm just worried about things that I haven't considered...
Heres something strate away fromhttp://w5.cs.uni-sb.de/~stahl/com/index_uk.html and another one As to your question i cant tell at the moment my brain is heavy.
I can't understand how those 2 work. I can understand how mine works, though... Although I did manage to find a better picture of the circuit, that I made back when I was thniking about building it nearly 2 years ago:
