Who is first

This control circuit utilizes two silicon-controlled rectifiers (SCRs) to ensure that only one lamp is illuminated at any given time. The first lamp (I1) is activated by SCR1, which is triggered when switch S1 is pressed. Similarly, the second...

This is the first MOSFET power amplifier designed, featuring a comprehensive circuit. As a 60-watt power amplifier, it is adequate for typical usage. The 60-watt MOSFET power amplifier circuit is designed to deliver high efficiency and robust performance for audio...

A Butterworth filter is a type of filter characterized by a frequency response that is flat within the passband region. This filter was first described by British engineer Stephen Butterworth. A Butterworth filter is designed to provide a maximally flat...

Quiz-type game shows are increasingly popular on television. In these games, fastest finger first indicators (FFFIs) are used to test players' reaction times. When a player presses their entry button, their designated number is displayed alongside an audio alarm....

First Response Monitor, Input Selector, Game Circuit. This circuit is utilized for first response applications as it aids in monitoring various responses in games. The First Response Monitor circuit is designed to facilitate real-time monitoring and selection of input signals...

If 12V relays are used, you can replace the 180R resistors R7, R9, R14, R16, R20, R22, R26, and R28 with a wire link (the resistors are only there to limit current if you use 5V relays, of which...