Frequency Divider Using T Flip Flop Configuration

The circuit was constructed to produce a frequency divider with the use of flip flops which are the basic building blocks of sequential logic circuits while forming a T flip-flop configuration.

Failure Switch Monitor for Car Lamps/Bulbs

The circuit has been designed for use on cars and other types of vehicles that would provide an indication during a failure of the lamps or bulbs.

Preamplifier Input From Moving Coil Head

The circuit was designed to implement special category of preamplifiers where the output from a moving coil head is amplified before passing to the input of the preamplifier.

Crystal Oscillator Frequency Converter

The circuit was designed to create a frequency convert with the use of a crystal oscillator for the conversion of 10 MHz to 1 MHz.

Buzzer-Employed Timer Circuit With Optional Optocoupler

The circuit was designed to formulate a timer that can provide an alert method with the use of a buzzer while the presence of the optocoupler will make it possible to drive an external circuit.  

20Hz to 200Hz Variable High-Pass Filter

The circuit was designed to create a high-pass filter that can be variably change to work with frequency range from 20 Hz to 200 Hz.