Check out the infrared alarm circuit too. For a wider range of the infrared transmitter the current through LEDs must he high. Because the LED cannot stand high dc currents, the impulses must be short ...

The transmitter and receiver circuits of the infrared alarm system shown here have been designed for a range of several meters, almost independent of ambient light conditions. Only in the rare case of ...

• LED and sound alignment indicators (transmitter and receiver) • Dynamic data communication between receiver and transmitter for optimal alignment and performance. By developing this new Smart Line ...

The third-generation smart home hub features an LCD display, an infrared transmitter and receiver, four programmable shortcut buttons, and a rotary knob. By Michael Brown.

An IR transmitter/receiver pair are positioned on either side of the fan. ... If the circuit recognizes both halves of the waveform the output should be 7200. If it only sees half then 3600.