Reddit:Electronics

All thanks to one single person who believed in me & pushed me to do it!

Yesterday I started up an old Soviet gas discharge rectifier ВГ-176.

Fixed a couple of old broken carriage clock recently with some STM32s, e-displays & some bling.

Setup:
* Microcontroller - NUCLEO_L432KC
* Display - Waveshare 2.9" & 3.7" E-Paper Displays
* Sensor - DHT Temperature & Humidity Sensor with 100k pull-up resistor between the 3.3V rail and the DATA/OUT line.
* Power - Voltage Regulator HT7333 and Micro USB 18650 Lithium Battery Charger Module
* Bling - Some pencil art with gold surround, gold run on transfers & corner protector gold filigree

How it works:

1. The teacher first scans their fingerprint to unlock the system.

2. Students then scan their fingerprints.

3. The system identifies the student using the fingerprint sensor.

4. It records the student's attendance along with the exact date and time from the RTC module.

5. The student's name and attendance status are displayed on the LCD.

6. An SMS is automatically sent to the parent informing them that the student attended the lecture

7. Attendance data is also sent to another number in a form hat can be stored digitally.

Last year I built this , then i visited tech feast with this, people there showing AI language translators, automated water filling and packaging machines, computer vision systems, custom PCBs, and projects that looked like actual products.

Meanwhile, my project was basically a small box with a fingerprint sensor and LCD

Now I'm motivated to build something much bigger this year, but no good idea is coming in mind

Can anyone share there project they might have built in there college times

Im so happy that it even works! Took me about an hour.