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deprecated/F1/Timelapse_keyboard_only_lasers/Readme.md

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+## Time-lapse as USB HID keyboard
+
+This tool allow to get precision time of events: four lasers with sensors (0->1 event), pressing switch-button (1->0 event).
+
+Just connect board to any device with USB keyboard support, after some time
+(needed to establish GPS connection and precision timer setup) it will simulate
+keyboard on which somebody types time of sensors' state changing
+
+
+#### Sensors supprorted
+* four lasers or other things, catch signal 0->1
+* simple switch-button, catch signal 0->1
+
+To get precision time this tool use GPS module (NEO-6M)
+
+#### Connection diagram
+| *Pin*  | *Function*  |
+| :---: | :-------- |
+| PA0  | Laser 1 |
+| PA1  | Laser 2 |
+| PA2  | GPS Rx (MCU Tx) |
+| PA3  | GPS Tx (MCU Rx) |
+| PA4  | GPS PPS signal |
+| PA5  | Trigger (button) switch |
+| PA6  | Input power measurement |
+| PA7  | Laser 3 |
+| PA8  | Laser 4 |
+| PB9  | Beeper |
+| * LEDS * |
+| PA13 | Yellow LED1 - Laser1/4 found |
+| PA15 | Yellow LED2 - PPS event |
+| PB7  | Green LED1 - Laser3 found |
+| PB8  | Green LED2 - power state: ON == 12V OK, BLINK == insufficient power |
+| PB6  | Red LED1 - Laser2 found |
+| PB7  | Red LED2 - GPS state: OFF == not ready, BLINK == need sync, ON == ready |
+
+
+#### Powering devices
+* To power up GPS module you can use +5V or +3.3V.
+* Lasers & photosensors need 10..30V of power, I connect them to 12V
+* Lasers' sensors connected to MCU through optocouples