Vintage Analog Synthesizer
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Twin-t-notch-filter
This filter is utilized to reject or block a specific frequency or range of frequencies. Such filters are commonly integrated into audio and instrumentation systems to eliminate a single frequency, for instance, 60 Hz. Commercial-grade components with a tolerance of...
Shruthi-1 Sound Filter
The Shruthi-1 is an impressive hardware synthesizer equipped with the highly regarded SMR-4 MkII filter board. Developed about a month ago, it has become a favorite tool for sound exploration. As a sound designer, there is a continuous drive to...
why doesnt this circuit oscillate
The buba oscillator initially failed to oscillate. The first step is to check the fundamental components, as minor errors in the values of capacitors, resistors, and inductors can significantly impact performance. It is advisable to measure component values with a...
High drive oscillator-flasher
The driver in the package is configured as a Schmitt trigger oscillator (A), utilizing resistors R1 and R2 to create hysteresis. The inverting feedback timing components consist of resistor R3 and capacitor C, while resistor R4 serves as the pull-down...
Big loop oscillator
L1 is a loop consisting of 10 to 20 turns of insulated wire with a diameter ranging from 4 inches to 4 feet. The oscillator frequency, which operates between 7 to 30 MHz, varies significantly when an individual approaches or...
Simple triangle-square wave oscillator
By making Rt variable, it is possible to alter the operating frequency over a 100 to 1 range. The versatile triangle/square wave oscillator has a possible frequency range of 0 Hz to 100 kHz.
The described circuit features a variable resistor,...
Acousto-optic detector circuit to measure the crystal
The circuit consists of a capacitance three-point oscillator, an isolation level, a voltage doubler rectifier circuit, a stereo sound circuit, and a flash display circuit. It can detect the quality of a crystal; a good crystal will emit a "Didi"...
RC Low-Pass passive Filter
What is the purpose of this circuit? Basically it has two roles: to pass the desired low frequency signals and stop the unwanted high frequency signals. Open the netlist file lpfilter1.cir with your SPICE simulator. Most simulators display the netlist...
Metal detector 4
The metal detector circuit comprises a detection oscillator, a reference oscillator, a mixer, and a signal display, as illustrated in Figure 8-70. The detection oscillator circuit is made up of the time base oscillator IC1, inductor L1, potentiometer RP1, diode...