Same 7.5inch e-Paper HAT (B) on another listing: （amazon.com.au/dp/B0BFQH7NNP?ref=myi_title_dp） Sometimes there will be stocks shipped by Amazon

User Manual: waveshare.com/wiki/7.5inch_e-Paper_HAT_(B)?amazon

---Note:

1.Refresh time: The refresh time is the experimental results, the actual refresh time will have errors, and the actual effect shall prevail. There will be a flickering effect during the global refresh process, this is a normal phenomenon

2.Power consumption: The power consumption data is the experimental results. The actual power consumption will have a certain error due to the existence of the driver board and the actual use situation. The actual effect shall prevail.

What is the usage environment of the e-ink screen?

• Working conditions: Temperature range: 0~50°C; Humidity range: 35%~65%RH
• Storage conditions: Temperature range: below 30°C; Humidity range: below 55%RH; Maximum storage time: 6 months
• Transportation conditions: Temperature range: -25~70°C; Maximum transportation time: 10 days
• After unpacking: Temperature range: 20°C±5°C; Humidity range: 50±5%RH; Maximum storage time: Assemble within 72 hours

Specifications

Precautions for e-ink screen refresh:

*refresh mode

• Full brush: The electronic ink screen will flicker several times during the refresh process (the number of flickers depends on the refresh time), and the flicker is to remove the afterimage to achieve the best display effect
• Bureau brush: The electronic ink screen has no flickering effect during the refresh process. Users who use the partial brushing function note that after refreshing several times, a full brush operation should be performed to remove the residual image, otherwise the residual image problem will become more and more serious, or even damage the screen (currently only some black and white e-ink screens support partial brushing, please refer to product page description)

*refresh rate

• During use, it is recommended that customers set the refresh interval of the e-ink screen to at least 180 seconds (except products that support the local brush function)
• During the standby process (that is, after the refresh operation), it is recommended that the customer set the e-ink screen to sleep mode, or power off operation (the power supply part of the ink screen can be disconnected with an analog switch) to reduce power consumption and prolong the life of the e-ink screen. (If some e-ink screens are powered on for a long time, the screen will be damaged beyond repair.)
• During the use of the three-color e-ink screen, it is recommended that customers update the display screen at least once every 24 hours (if the screen remains the same screen for a long time, the screen burn will be difficult to repair)

*Application

• The e-ink screen is recommended for indoor use. If it is used outdoors, it is necessary to avoid direct sunlight on the e-ink screen, and at the same time, take UV protection measures, because charged particles will dry out under strong light for a long time, resulting in loss of activity and failure to refresh. This situation is irreversible. When designing e-ink screen products, customers should pay attention to determine whether the use environment meets the requirements of e-ink screen
• It is a normal phenomenon that the three-color EPD will have a certain color difference in different batches. Hence, It is recommended to use the program to clear all the pictures on the EPD and store it facing up. Please clear the screen several times before powering on.
• Control the 0x3C or 0x50 (refer to the datasheet for details) register to adjust the border color. In the demo, you can adjust the Border Waveform Control register or VCOM AND DATA INTERVAL SETTING to set the border.
• The FPC cable of the screen is relatively fragile, pay attention to bending the cable along the horizontal direction of the screen when using it, and do not bend the cable along the vertical direction of the screen.
• The screen of e-Paper is relatively fragile, please try to avoid dropping, bumping, and pressing hard.
• We recommend that customers use the sample program provided by us to test with the corresponding development board.