Papalapa Posted December 26, 2021 Share Posted December 26, 2021 Until now I was succesfully using my Commodore Amiga mouse with an adapter in my Atari 1040 STF. Recently I get a second-hand STM1 mouse, and once received I found that one of the encoder shaft supports was broken. It has been not complicated to repair it, but now I have another curious problem: On the repaired shaft axis the cursor only moves in one direction, that is, if I move the mouse to the left, the cursor in the screen moves to the left, but if I move the mouse to the right, the cursor also moves to the left. What can be the cause of this problem? Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted December 26, 2021 Share Posted December 26, 2021 Usually broken wire in cable, at connector. 1 Quote Link to comment Share on other sites More sharing options...
Chri O. Posted December 28, 2021 Share Posted December 28, 2021 I fix one Mouse by replacing IR emitter on the encoder wheel. You can use your cell phone camera to see if the IR emitter works properly. 1 Quote Link to comment Share on other sites More sharing options...
Papalapa Posted December 28, 2021 Author Share Posted December 28, 2021 18 hours ago, Chri O. said: I fix one Mouse by replacing IR emitter on the encoder wheel. You can use your cell phone camera to see if the IR emitter works properly. You're right, using the cell phone camera I have seen that one of the IR emitters is not working. What sounds strange to me is that only one IR emitter is damaged and the second one is working, and as you can see in the diagram both are in serial configuration so, if one of them is in open circuit , the other should not work. Anyway, what kind of IR emitter can I use? Unfortunatelly the diagram has not any part reference nor model... Quote Link to comment Share on other sites More sharing options...
Chri O. Posted December 29, 2021 Share Posted December 29, 2021 Quote Anyway, what kind of IR emitter can I use? Try this: Digi-Key Part Number QEE113-ND DATASHEET 1 Quote Link to comment Share on other sites More sharing options...
Papalapa Posted December 29, 2021 Author Share Posted December 29, 2021 6 hours ago, Chri O. said: Try this: Digi-Key Part Number QEE113-ND DATASHEET Many thanks, I'll try... Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted December 29, 2021 Share Posted December 29, 2021 15 hours ago, Papalapa said: diagram both are in serial configuration so, if one of them is in open circuit possibly a short to 0V at the junction between the two TX diodes ? that way the top one would work, the other off 1 Quote Link to comment Share on other sites More sharing options...
Papalapa Posted December 30, 2021 Author Share Posted December 30, 2021 22 hours ago, TGB1718 said: possibly a short to 0V at the junction between the two TX diodes ? that way the top one would work, the other off Thank you for the suggestion, but I already checked this and also re-soldered some solder points in the PCB without success. As the plastic parts have also some minor defects and the mouse cover are like new, finally I decided to buy the Tim Lenke's conversion kit to improve the mouse movement and avoid future mechanical problems. Quote Link to comment Share on other sites More sharing options...
Chandler Posted December 30, 2021 Share Posted December 30, 2021 How do you use a cell phone to test the wheel emitter? Quote Link to comment Share on other sites More sharing options...
snarkdluG Posted December 30, 2021 Share Posted December 30, 2021 1 hour ago, Chandler said: How do you use a cell phone to test the wheel emitter? Just start your camera app on your phone and point it at the IR source (LED/emitter). You could check it on your remote control for your TV for example. You will see it flashing when you press a button. Quote Link to comment Share on other sites More sharing options...
Papalapa Posted December 31, 2021 Author Share Posted December 31, 2021 On 12/30/2021 at 7:11 PM, snarkdluG said: Just start your camera app on your phone and point it at the IR source (LED/emitter). You could check it on your remote control for your TV for example. You will see it flashing when you press a button. That's right, but I do not know why the iPhones at home are not able to see the IR emitting. I succefully tested a Nokia, an HTC and two different Samsung phones without problems, but the iPhones 5s, SE and 7 at home do not show the light ¿? I alss tested the IR remote of my SAT receiver with the same result. Quote Link to comment Share on other sites More sharing options...
snarkdluG Posted December 31, 2021 Share Posted December 31, 2021 (edited) 56 minutes ago, Papalapa said: That's right, but I do not know why the iPhones at home are not able to see the IR emitting. I succefully tested a Nokia, an HTC and two different Samsung phones without problems, but the iPhones 5s, SE and 7 at home do not show the light ¿? I alss tested the IR remote of my SAT receiver with the same result. Oh, that's interesting, I didn't know that. EDIT: Apperently some iPhones has a filter on the (back) lens. But front camera should work. Edited December 31, 2021 by snarkdluG Quote Link to comment Share on other sites More sharing options...
Chri O. Posted January 1, 2022 Share Posted January 1, 2022 That all means stay away from iPhone they are overrated anyways. Happy New Year all ? 1 Quote Link to comment Share on other sites More sharing options...
Chandler Posted January 9, 2022 Share Posted January 9, 2022 OK so i used a phone camera to check the LEDs on an STM1 i have that doesn't move left/right And sure enough i can see all 4 LEDS emitting a purple coloured light So does this mean the LEDS are ok? and there is something else causing the lack of left/right movement? On this particular mouse i have changed the cable and caps and still the issue, no broken solders or tracks What else to look at apart from changing the chip and testing resistors?! Quote Link to comment Share on other sites More sharing options...
Fivetwenty Posted January 9, 2022 Share Posted January 9, 2022 Have you tried to roll those axis wheels by finger both directions without the ball? You have probably cleaned those axis very well but very dirty mouse acts similarly if I remember right. If it does work that way maybe one of the axis is not alignet right for some reason? Quote Link to comment Share on other sites More sharing options...
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