Issues
- Breakable parts are hard to break without incisions, need mouse bites (plate cutouts too)
- If you're soldering side parts without double row headers, solder leaks through the holes
- Small clearance between switch pads in footprints (works fine, maybe fix in next version)
- Li-Po charger mounting holes are about 0.1mm off (not really a problem, but could be fixed)
- Li-Po solder jumpers on the back side of the PCB are messed up (fixable with wire jumpers)
It's been recently discovered that battery could leak from LEDs (apparently there's still current when LEDs are off). All RGB Keyboards are affected (Corne, Helidox, etc.). According to specs, ws2812 LEDs draw 1mA of current when off:
- https://cdn-shop.adafruit.com/product-files/1138/SK6812+LED+datasheet+.pdf
- https://www.pjrc.com/how-much-current-do-ws2812-neopixel-leds-really-use/
Possible solutions would be desoldering ALL LEDs OR cutting VCC line (and maybe adding a switch).
You could desolder LEDs so the keyboard won't draw more than the original Mitosis keyboard.
Read about it here: https://github.com/joric/nrfmicro/wiki/Issues#add-power-switching-circuit-to-the-board
Power pin (I suggest using PIN20) can be turned on and off with a modified firmware for the keyboard halves. Put the code to enable and disable power pin somewhere here:
#define POWER_PIN 20 // unused pin (marked as SWO)
static void gpio_config(void) {
...
nrf_gpio_cfg_output(POWER_PIN); // configure pin for the output
}
void hw_keys_handler() {
...
rgb_mode = (rgb_mode + 1) % rgb_num_modes();
if (rgb_mode==0) nrf_gpio_pin_clear(POWER_PIN); else nrf_gpio_pin_set(POWER_PIN);
...
}