Showing 1 of 84 conversations about:
Tosel
157
Jan 13, 2019
bookmark_border
Just for the sake of curiosity, what is the power consumption of this thing? I have an IBM model F coming on which I will insert a teensy as soarer's converter, and I am wondering if it would be possible to insert also this little dongle and a little battery bank! Probably the problem would be power drag of the old capacitive pcb anyway...
Jan 13, 2019
woodstick
2
Jan 13, 2019
bookmark_border
I don't know about the power consumption but an adafruit feather with Bluetooth built in might be a solution for you
Jan 13, 2019
Tosel
157
Jan 13, 2019
bookmark_border
That probably would be the right path, I know adafruit makes a lot of cool things, some with bluetooth too, too bad that I know exactly nothing about how to program those things, and programming in general! Soldering 4 wires on a teensy and flashing a prebuilt image using a guide is the best I can do unluckily... (and yet it seems to be a lot more than what an average person can do!)
Jan 13, 2019
woodstick
2
Jan 13, 2019
bookmark_border
Depending on what teensy you ise the flash would be the same. The feather comes with an atMega4u32 chip which is the same as a lot of teensy config.
(Edited)
Jan 13, 2019
Tosel
157
Jan 13, 2019
bookmark_border
The chip is the same, but I probably should build into the firmware the ability to send scancodes over bluetooth, otherwise it should work exactly like a standard teensy...
Jan 13, 2019
woodstick
2
Jan 13, 2019
bookmark_border
start here i guess https://learn.adafruit.com/convert-your-model-m-keyboard-to-bluetooth-with-bluefruit-ez-key-hid edit-fyi: the feather has built in battery charging
(Edited)
Jan 13, 2019
Tosel
157
Jan 13, 2019
bookmark_border
I had already seen that, but it seems a little outside of my comprehension, at leas by now! It's a start anyway!
Jan 13, 2019
woodstick
2
Jan 13, 2019
bookmark_border
look at it like this, if you get the hang of this, you can tweek any keyboard you want. A very nice addition to your skill set i would say. good luck if you choose to pursue
Jan 13, 2019
Klingon00
12
Jan 13, 2019
bookmark_border
Here are some tips I found for running a teensy project off a battery: https://www.pjrc.com/teensy/low_power.html Overall, a teensy uses a low amount of power and a typical cell phone charging battery should last a long time.
Jan 13, 2019
handheldsci
152
Jan 13, 2019
bookmark_border
The adapter itself takes about 40mA of current (not counting any current taken by the connected keyboard). To convert a Model M/F to wireless, you will need a BT-500 and a PS2 to USB converter which can be had for less than $2 (look at our web site to see which ones are supported). I wouldn't try to power a Model M/F with a battery bank because it takes huge amount of current (by today's standard). If you really want to do that, figure out the battery time based on its capacity and keyboard current consumption (to avoid disappointment), then power the BT-500 with the battery bank and now you have a Bluetooth Model M/F.
(Edited)
Jan 13, 2019
Tosel
157
Jan 13, 2019
bookmark_border
Thank you! I just measured the model M, and the power consumption seems to depend only from the locklights, it is 110 mA in normal use (only num lock light), and has a minimum of 80 mA with all lights off and a maximum of 140 mA with all lights on. Combined with the BT-500 it should be about 150 mA, so with a small 3000 mAh it should last about 3000/150= 20 hours. Not really a lot, and probably a model F has an even higher power draw...
Jan 13, 2019
handheldsci
152
Jan 14, 2019
bookmark_border
The Model-M we have consumes 200mA of current. And the voltage range is pretty strict. It won't work if the voltage is below 4.8V (so make sure the battery bank will maintain its voltage during discharging especially towards the end). In any case your calculation is correct. If you are ok with the battery time, this BT-500 + PS2 to USB converter + battery bank is the easiest way to convert the keyboard to wireless, without messing with circuit board or programming.
Jan 14, 2019
dragon788
69
Feb 14, 2019
bookmark_border
Have you guys tested the Model M/F with a Soarer's Mod between the keyboard and the BT-500? I haven't fully dug into the key mapping/conversion options of the BT-500, but in the past I've used a couple prebuilt Soarer's Mods that are as small as a PS/2 to USB converter but let you remap keys and adjust various other settings as well on several keyboards, and I wonder if they would complement each other.
Feb 14, 2019
handheldsci
152
Feb 16, 2019
bookmark_border
Are you talking about Soarer's Model-M to USB conversion cable as in the following picture (id is 154A:0002)? We have one and it does work with BT-500. There is no point to use this expensive cable. You can buy a PS2 to USB converter for less than $2 (our compatibility page lists all those converters tested), so you can use any PS2 keyboard/mouse including model M/F with the BT-500, which is a lot more capable.
search

Feb 16, 2019
dragon788
69
Feb 16, 2019
bookmark_border
I was actually thinking about this one for a model M, but great to know with the correct cable or PS/2 no extra controller is required. https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F282933562080
(Edited)
Feb 16, 2019
View Full Discussion