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Driving an LC shutter using a solar panel

The point is, that any DC current will destroy this type of shutter. The circuit you linked, creates an AC square wave voltage to feed the shutter. "Hex buffer" is just slang word and refers ...
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How can I get higher fps with ESP32-CAM and ST7789 TFT LCD?

By switching to Larry Banks JPEGDEC library, I have achieved a total throughput of 33.27 fps for capturing, decoding and displaying the images. This library employs an optimized jpg decoder as well as ...
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How to filter EMI noise from DC motor between LCD and microcontroller?

Well, many antennas close together. The only display signal input, that can cause data to be written, is the E (Enable) input. It is the clock of the transfer. So, it's likely, that this wire receives ...
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How to filter EMI noise from DC motor between LCD and microcontroller?

Filter the motor. I have one in my junk box, long since forgotten what it was pulled from, but it's got capacitors on the back -- a perfect illustration for this, actually. The leads on the caps ...
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TFT-LCD VCOM powered by LDO

Supply the required voltage from wherever or whatever you want. Just be careful about the voltage limits and current demand, although the VCOM current requirement of the LCDs is generally low. Some of ...
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LCD identification & repair

If you re-insert the FPC into the connect, see if it changes. Vibration may have shifted it or something is oxidized. While operating, Then press with finger on each component to look for open solder ...
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