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+![Photo](./photo.jpg)
+
+This is the firmware for a simple thermocromic selfie camera based on
+
+- A OV7670 camera module (without FIFO),
+- A STM32F103C8T6 microcontroller, and
+- A LTP1245 thermal printer module.
+
+Apart from that, only a level shifter for the thermal printer (which needs 5 V signals), a motor driver for its stepper, a pullup for its thermistor, and a MOSFET for turning all power off are needed.
+
+More details can be found [here](https://25120.org/post/inverse_thermal_camera/).
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