Most recent activity
-
The sockets are actually for IC pins and the last place I bought something similar was from Mechboards .
The usual breadboard jumper wires are too thick for these sockets and I am afraid I have no idea where the ones in the picture came from.
-
Here is the video of the editor in action writing the traditional hello world program. The typing is a little painful as I am used to using this keyboard with my thumbs.
https://youtu.be/eWG1iZ8Woz0?si=R9hkCvVP_7za8025
There is an example of cut and paste at the end of the video.
-
I have posted a more comprehensive description of this on Hackaday https://hackaday.io/project/195010-pocket-pad/ . It has also been picked up by a Hackster writer here.
-
Thanks, that is interesting, I will try it on the boards I have. Yes, I think the main difference is the 3.3V regulator. The full schematic for the nice!nano can be found here https://nicekeyboards.com/docs/nice-nano/pinout-schematic. There are two versions. I think the AliExpress board is like V1 except that the resistor should be 2M not 5K. I have the V2 board which has a different circuit for the external 3.3V.
Can you post a photo of the location of the 5K resistor.
-
I saw that too but I think it’s related to switching off the 3.3V supply pin so I do not think it helps if you do not switch off the 3.3V. That is, it’s a pullup on the pin which controls the 3.3V
-
@Gordon Thanks, I missed the keypad module but that is exactly how my scanner works. To make sure nothing is missed, I keep the scanner active for 5 seconds from the last key event after the first keypress wakes it up then it goes back to waiting for a key interrupt as you describe.
@fanoush In fact, I started with some of the Aliexpress modules and in some ways, you get what you pay for. The quiescent current of the nice!nano is around 10 microamps while the Aliexpress module is more than 140 microamps.
I now have a basic editor working and I can now hack all its software on the device itself. Hope to post a video of it soon.
I have only got the datasheet for the ST7302 which I have attached. I did not manage to get hold of a ST7301, what is the physical size?