Your keyboard is cracked

Inject a little innovation vitality into this screwed-up keychain. Nowadays, there are too many people trying to make money in keychains, there are a lot of conflicts, there are a lot of people trying to get rid of them, and they still have an inexplicable sense of superiority. Innovation is getting worse and worse. It’s all about changing the skin, hey.

The detached keyboard is divided into four parts: left, right, F area and numeric keypad area. The shell has been ordered to be 3D printed by 3D Monkey, and the PCB has been drawn. Waiting for proofing and testing, all four areas use nrf51822 master control. Use The control method is 2.4G (only 2.4G) and are independent of each other. They are only connected to 5V for charging through pigopin. Each area has a TP4056 lithium battery charging module that supports hot swapping, but there is no light. (I repainted the reverse sticker light, but this light is globally controlled and cannot be controlled individually, because to save power, you cannot use WS2812, and the axis supports 5-pin reversible insertion, so you can only add 2-pin lights)

The casing has been bought back, costing 100+, and now we have to do the PCB, but the PCB costs a lot, and it costs 160+/5 pieces if it is not rolled down.

The progress is slow because I have no money for proofing, so I can only go to the enemy's house to make 2 pieces every month. The two pieces made this month are due to missing M2 screw holes and re-modification of the LED package. Don't rush me. Also busy with other things. (JLC proofing the above four PCBs costs at least 150 yuan/5 pieces, I am poor) 2021-09-29

1) Tested the receiver, the receiver is ch552e + nrf51822, the test 2.4G function is normal, HID data transmission is normal, but because of the problem of using the onboard antenna, the signal is poor (30 cm effective communication distance) at the back Replaced it with a ceramic antenna and used the plastic casing of the USB receiver sold on Shenshuibao. 2) After thinking about it, I found that adding LEDs seemed useless. The four keyboard areas could not be synchronized, so the RGB lights seemed very awkward. It’s abrupt, and the current version has a little less functionality. 3) Maybe delete the LED lights. After all, it’s not synchronized and can’t be used indiscriminately. But if you have a battery, you need to have a battery indicator, which requires lights. 4) You need to add a lithium battery voltage collection network ( ADC) 5) 32k crystal oscillators need to be added to the 4 keyboard areas to ensure low power consumption, but the receiver is not used because the receiver is always plugged into USB and consumes power from the computer. 6) The onboard antenna is too wide. Later modified to a ceramic antenna

I can no longer afford JP proofing, and JLC is too expensive (more than 200 for 4 partitions). I will come back later when I have more money. I will take the PCB project off the shelf first, and just leave the schematic diagram, and modify it later. After what time will the new project be updated 2021-10--22