Switch Debounce circuit | Next Electronics

The NEScaf filter is designed to offer greater flexibility than previous filters for QRP (low-power) radio rigs. It features two panel-mounted controls: a single center-detent potentiometer that adjusts the center frequency of the filter's bandpass (settable between approximately 415 Hz...

ROTARY SWITCH DEBOUNCE

A three-stage active Butterworth bandpass input filter is utilized in a radioteletype demodulator to differentiate RTTY tones from one another and from noise. The filter is centered at 2200 Hz and has a bandwidth of approximately 260 Hz, allowing for...

AMP Hexadecimal Rotary Switch

Pictures and a sample schematic (including pinouts) of an AMP hexadecimal (16-position) switch with a screw slot actuator. The AMP hexadecimal switch is a 16-position rotary switch designed for applications requiring multiple selectable options. This switch features a screw slot actuator...

circuits

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First-order butterworth active Low-pass filter circuit

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 frequency...

Variable Q Filter For 400Hz Circuit

A bootstrapped twin notch filter in this circuit can yield an effective Q of up to 10. Rs adjusts the feedback, hence the Q. Values of C1 and C2 can be changed to alter the frequency. RF is a fine-tune...

Logic adjustable Glow-Plug drive

All of my turbine starts before the research on the ECU involved a very successful spark ignition. I thought (only briefly) of trying to add spark ignition to the ECU, but the mixture of delicate logic circuitry and perhaps 30,000V...

Logic adjustable Glow-Plug drive

All of my turbine starts before the research on the ECU involved a very successful spark ignition. I thought (only briefly) of trying to add spark ignition to the ECU, but the mixture of delicate logic circuitry and perhaps 30,000V...

af filter

The graphs below illustrate the computer predictions of filter performance provided by Harry PA0LQ. Click on the thumbnail to view the full-size graph. A significant challenge in aligning the filter was the lack of access to a frequency counter with...