On Mice and Keyboards

Author	Message
CircuitGizmos Guru Joined: 08/09/2011 Location: United States Posts: 1427	Posted: 05:40pm 08 Jul 2021       I've updated the list of keyboards and mice that are known to work with the CMM2/RetroMax: https://docs.myretromax.com/Of_Mice_and_Keyboards.html If anyone has more that they know of and would like to share, please feel free to post. Micromites and Maximites! - Beginning Maximite
Grogster Admin Group Joined: 31/12/2012 Location: New Zealand Posts: 10056	Posted: 01:06am 09 Jul 2021       Keyboard: PHILIPS WPG3KB11S/42 I've used that KB all through the CMM2 testing, and it works perfectly.
mklausm Newbie Joined: 10/07/2021 Location: Germany Posts: 4	Posted: 05:37pm 10 Jul 2021       I have the Logitech K120 which is on the list and it does not work with Maximite 2 and Maximite 2 Gen2. It seems that no matter which keyboard (Fujitsu KB 410, Trust, Logitech K120 and others) is connected, they only work for a certain time. It's probably the power supply that's the problem. The ones I've tested don't seem to be powerful enough. What kind of power supply should I use ?
Volhout Guru Joined: 05/03/2018 Location: Netherlands Posts: 6168	Posted: 06:58pm 10 Jul 2021       Dell 08017 works fine...
CircuitGizmos Guru Joined: 08/09/2011 Location: United States Posts: 1427	Posted: 08:01pm 10 Jul 2021         mklausm said   I have the Logitech K120 which is on the list and it does not work with Maximite 2 and Maximite 2 Gen2. It seems that no matter which keyboard (Fujitsu KB 410, Trust, Logitech K120 and others) is connected, they only work for a certain time. It's probably the power supply that's the problem. The ones I've tested don't seem to be powerful enough. What kind of power supply should I use ? So many 5V supplies are not up to the specification written on them. I great number that I have tested that say something like 5V 1000mA don't provide both specs simultaneously. In other words, as I increase the load to draw 300mA, the 5V has dropped to 4.5V. At 500mA a lot of these are under 4V. I suggest the Samsung or Apple wall warts. They maintain 5V well above 500mA. I changed the RetroMax design (2.3a) to use the USB "C" connector.
Mixtel90 Guru Joined: 05/10/2019 Location: United Kingdom Posts: 9173	Posted: 07:32am 11 Jul 2021       Doesn't matter about the power supplies too much in my experience. Most will hold their voltage high enough to keep the 'mites happy if they have enough current rating. I wish I could say the same for A-B USB leads though. Many of them are made with partially-conductive cheese instead of wire and are simply useless for supplying current. That's fine when they are connecting from a computer to a printer - there'll rarely be more than a few mA on any wire and often virtually no current on +5v. No good for 500mA though. The voltage at the 'mite will easily fall by over a volt. The supply is still putting out 5v but the lead loses the rest. And just to stay on topic....  :) I have a really cheap Acer SK-9621 which, while it will win no prizes for typing experience, works well on the CMM2. :) Edited 2021-07-11 17:35 by Mixtel90
mklausm Newbie Joined: 10/07/2021 Location: Germany Posts: 4	Posted: 09:09am 11 Jul 2021       at least the problem with the Maximite 2 Gen 2 Deluxe has been solved, the sockets were wrongly labelled (there are 2 usb sockets for keyboard and mouse). Thanks to Piotr's quick help, the problem was fixed. Piotr reacted very quickly and I am glad about the fast and good help. For the old maximite 2 I will try a Microsoft 600 keyboard and I have changed the USB cable to the power supply. As soon as I have the new keyboard I will test it and give feedback
CircuitGizmos Guru Joined: 08/09/2011 Location: United States Posts: 1427	Posted: 03:13pm 12 Jul 2021       You have a very valid point about the A-B leads/cable:   Mixtel90 said   Many of them are made with partially-conductive cheese instead of wire and are simply useless for supplying current. That's fine when they are connecting from a computer to a printer - there'll rarely be more than a few mA on any wire and often virtually no current on +5v. No good for 500mA though. The voltage at the 'mite will easily fall by over a volt. The supply is still putting out 5v but the lead loses the rest. Better cables have fixed a few problems for the MaxiMites.