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OK, I implemented your instructions. See version 3 schematic attached.
That seems to have fixed the joystick problems!!
The encoder still works OK.
Well, I can't thank all of you enough. I would have NEVER figured all of that out myself. I bought this joystick/encoder because it had all the...
Brian,
My schematics have shown 3.3v going into the MCP3008 at pin 16 VDD and pin 15 VREF. Are you and @FvM saying the 3008 is still getting 5v? (from the X and Y wires coming from the joystick?)
OK Brian, I'm implementing your instructions now.
Ah ha...you were right Brian. 3.3v is not enough light to make the encoder work reliably. So I had to connect to 5v and it seems to work 100% of the time now.
So while the encoder now works reliably, the joystick X Y is no longer discrete:
X Left == 1023 and Y also shows 1023.
Y down == 1023...
Brian,
The joystick seems to be working OK at 3.3v so I'm going to stick with that. I cannot run the 3008 at 5v because the Raspberry Pi GPIO pins are only good for 3.3v.
Just for completeness, I'm going to now build a Fritz wiring diagram and will post it next.
Thank you...
1615557003...
I got it all working OK using 3.3v power. The joystick can now move discretely left/right/up/down. For some reason it cannot do that using 5v.
My last question is: do I need to add those resistors as shown in the wiring spec (see attachment). If I do, exactly how do I run the A and B wiring to...
Hi Brian,
Thanks for that clarification. I'll go back to connecting to 5v.
I do have the rotary encoder connected and it is working fine.
I do have the push switch connected and it is working fine.
I'm just struggling with trying to get the joystick X and Y pins of the whole CJ25-882010...
I am not using any pull ups at this time (as far as I know).
I'm using the Raspberry Pi SPI library to connect to the MCP3008. I'm still trying to determine if that library even let's me set a pull up.
I think once I can figure out how to eliminate that random voltage drop to zero (which...
I have not installed any pull up resistors. Which line would I do that with and what res value?
I connected the joystick to 3.3v and I'm getting better results, meaning, the left-right and up-down voltages are now discrete so I should be able to code for specific stick positions. The only...
I bought a CJ25-882010 encoder/joystick to control the moving map display of my desktop flight simulator.
I'm using a Raspberry Pi 4 and have i2c and SPI enabled. I'm using an MCP3008 ADC chip (but I'm not sure if I need it with this encoder?).
The CJ25-882010 spec sheet says voltages for the...
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