Window-detector

This circuit de-energizes a normally energized relay if the input voltage exceeds or falls below two individually set voltages. The transistor driving the relay is typically activated by resistor R4, keeping the relay energized. If the cathode of diodes...

The detector circuit compares the output voltage of two separate voltage dividers with a fixed reference voltage. The resultant absolute error signal is amplified and converted to a logic signal that is TTL compatible. The described detector circuit serves as...

This simple window detector utilizes half of a 7400 quad NAND gate along with four resistors, selected to ensure that the voltage at point A exceeds the voltage at point B for any input voltage. When no input is...