HC-SR501 pyroelectric infrared motion sensor modules Posted 10 January 2016 | Updated 16 February 2018Filed under Electronics
The 4 basic sections of an Arduino sketch Posted 18 September 2018 | Updated 22 February 2021 Filed under Electronics
Laser transmitter and receiver modules for sensing movement Posted 23 March 2016 | Updated 25 January 2021 Filed under Electronics