Full feature custom PCB prototype service:https://www.pcbway.com/
One pcb board for free, for new pcb designers,try it.
nokia 5110 lcd display and dht11 to make temp and humidity gadget:
https://youtu.be/lpR8hmQY8JA
Arduino lcd 16x2 display and soil sensor to make watering system:
https://create.arduino.cc/projecthub/...
For DIY Led hourglass i got this info:https://www.reddit.com/r/arduino/comm...
MQ9 gas sensor experiment video:https://youtu.be/MlNrHiFGRKo
ISD1820 Sound Voice Recording Playback Module Recorder:
https://ebay.to/2WecYxd
10 Smart Gadgets For DIY Projects ─ Hacktuber
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