Quantity   Component name
1 × TCT40-T 40 kHz piezo ultrasonic transmitter
1 × NodeMCU V2
2 × HC-SR501 PIR motion sensor
1 × NE556 Clock and Timer ICs / Timer ICs
1 × 5mm green LED
2 × 5mm amber LED for motion detect + transmitting indicators
1 × Pushbutton switch For testing
1 × 2N2222 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs