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Mionix Castor Ice Cream Gaming and Artist Mouse Review

By Chad Sebring from Sep 29, 2017 @ 11:55 CDT
TweakTown Rating: 93%Manufacturer: Mionix

Inside the Castor Ice Cream




Only two screws are holding the Castor Ice Cream together, and once removed, we can peek in at the internal components. There is a PCB built into the top section, and for access inside, it is best to remove the short cable which connects to the main PCB found in the lower half of it.





The PCB in the top half of the Castor houses a trio of TTC switches. The pair of red ones is for the left side buttons. These are softer in required force than the white one for the DPI button, but all three offer the same, slightly audible, click from use.




Mionix is still using Omron switches to back the main buttons. They are also sticking to the D2FC-F-7N(20M), or those with a twenty-million-click lifespan. Just because they got rid of the LEDs does not mean they skimped anywhere else. We can also see that the scroll wheel has a pad style switch, which is easy to press, but has a hollow click reported when used.




From what we can recall, the MCU has changed slightly. In the Castor Ice Cream, we are looking at the ST Microelectronics STM32L100-RBT6. This Arm Cortex-M3 processor is a 32-bit controller, overkill for this device, and is also where the 128 kB of memory is found.




Mionix chose to use an optical sensor in this device, but the Castor Ice Cream has half the DPI of the original. To offer the 5000DPI range, we find the PixArt PMW3310DH-AWQT present in the middle of the PCB.




The last thing we found inside of the new Castor mouse is the second Omron switch used under the right click button. Both switches are standard in feel to many other mice using Omrons, and the report is easily heard when the switch is pressed.




Believe it or not, we do have the Mionix Castor Ice Cream powered, and it is indeed working. Unlike many other products on the market today, Mionix chose to buck the system and has removed any and all LEDs from the design, so the only way to tell if it is connected is to try using it.

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