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The control terminal at 5 feet and the threshold end at 6 feet represent two internal input voltage comparators. As long as the voltage at 6 feet exceeds the voltage at 5 feet by 5 mV, the 555 timer...
Applications include the 900 MHz ISM Band, Satellite TV LNB IF Amplifiers (950 - 2150 MHz), 1575 MHz GPS, 2.4 GHz ISM Band (802.11 b/g WLAN, Cordless, etc.), "SDARS" Satellite-based Radio (2.33 and 2.6 GHz), 5-6 GHz WLAN (802.11a),...
The pyroelectric infrared sensor head operates as illustrated in the accompanying figure. Upon detecting an infrared signal from a human body within its monitoring zone, the sensor head generates a positive pulse signal. This signal is transmitted to the...
This circuit is designed for tone control utilizing a three-band equalizer. It is based on the LF351 single-chip operational amplifiers. The circuit features three adjustable ranges: bass, mid, and treble controls. The equalizer allows for approximately +/-20 dB of...
If circuits experience frequency overvoltage conditions, continually replacing blown fuses can become quite costly. This shutdown circuit addresses that issue by substituting the fuse with a relay and a low-current SCR. When the input voltage exceeds the threshold established...
The TV transmitter circuit described utilizes UK standard 1 FM modulation for audio and PAL modulation for video. The audio signal intended for modulation is first amplified using transistor Q1 and its associated components. Transistor Q2 serves dual purposes:...
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