Search Results for "signal detector"

...The mode this signal decay depends of target characteristics ( form, type, material ) and the distance. This is the signal we need to analyze, so it is supressed by two antiparallel diodes and passed to an operational amplifier . After amplification, the analog signal is read by one of analog input of Raspberry Pi Pico board and is analized by the software.

...It is an Android application that leverages on-device sensors to provide monitoring and protection of physical areas. Haven turns any Android phone into a motion, sound, vibration and light detector, watching for unexpected guests and unwanted intruders. We designed Haven for investigative journalists, human rights defenders and people at risk of forced disappearance to create a new kind of herd immunity. By combining the array of sensors found in any smartphone, with the world’s most secure communications technologies, like Signal and Tor, Haven prevents the worst kind of people from silencing citizens without getting caught in the act.

By leveraging a microcontroller RS232 port as both a modulation source and detector, it is possible to make a simple proximity or through beam type sensor for very little cost. A special bit pattern is used to eliminate any DC component in the RS232 signal making it compatible with the IR receiver.

Tapita (snack in spanish) is a BPM detector trough keyboard, MIDI and jack written in C with GTK2.