LD271 circuits - related electronic projects and circuit diagrams (schematics), this helps you finding desired informations and facilitates your site navigation through all articles database. In every website page you will find a special section (at the beginning or the end) with tags just like this and also different tags associated with the current article. Tags inter-links stories with related LD271 articles.
This infrared transmitter can be used with this infrared receiver. This transmitter uses impulse modulation. The modulated signal is produced by comparison of an audio signal with a triangle signal of high frequency using a comparator IC. An appropriate triangle signal generator must have the offset equal with half of the 5V power supply voltage and the triangular signal size is 2.5V. Check out the infrared alarm circuit too.
This infrared tranmitter is intended for use with this infrared receiver.
It works with 2 – 1.5V batteries or a 3V lithium battery. To give a compact infrared device assembly and still a good frequency stability, the circuit uses a oscillator with outpashing network. Current consumption depends on power supply and duration as S1 remains pressed. When Ub = 2V, the frequency is 29.3 kHz, the LEDs top current is 25 mA and total current consumption is 27 mA.
