VFD18-0615 Clock

The back of the screen is printed with JG180602. This clock is an improved version of the ESP32-C3 VDF clock for this project. I didn't take any video or pictures. I'll leave it as it is for now.
I bought 20 of this screen for 25 yuan, but now they're all sold out. The screen is cheap, but the drive circuit is expensive.
Project source code repository link
Development notes
 
Negative voltage circuit + LM9022 AC filament driver + HT16512 constitute the drive circuit of this VFD screen. The pin diagram shows the segment information and the corresponding display data written into HT16512.
Program download: Please understand the use of STC-ISP by yourself.
Assembly: The VFD screen is fixed on the PCB with 3M double-sided tape, single-pass copper pillars M2-5+3mm x4 on the rear panel, double-pass copper pillars M2-8mm x4 on the front panel, M2 round head hexagon screws x8, two cut 1.8mm thick acrylic plates (the cutting specification file is in the front and back panels of the circuit project, please export it to Taobao to cut it yourself)
 
VFD18-0615 clock:
. 24H hour time display
. 8-level brightness adjustment or automatic brightness adjustment (4-8 levels of brightness currently do not see any difference)
. The annual error of the travel time is about 2 minutes (room temperature 25℃)
. The RTC chip has a built-in rechargeable battery. The battery is fully charged and can travel for about 8 months when the clock is powered off
. Turn off the display at night
. Countdown
VFD18-0615 clock parameters:
. Dimensions: 91mm*25mm*22mm (manual measurement inevitably has large errors)
. Working temperature: -10~60℃
. Working voltage: 5V
. Working current: average 206mA, the instantaneous current of the buzzer is about 462mA, and 10mA when the display is turned off and in standby mode
. The power supply interface is a 6pinTypec port, and the power adapter should be 5V 1A or can output a larger current.
 
Notes:.
Please bring your own 5V power adapter
. Please keep it for at least 3 days for the first power-on to fully charge the RTC battery
. Do not touch it with wet hands
. Do not use the computer USB port to power the clock
. It is normal for the copper column to oxidize and turn black
. Avoid direct sunlight to cause aging of acrylic boards and components