Video Signal Emphasizer and Amplifier Circuit

The construction of the circuit was focused on emphasizing and amplification of video signals to obtain more clarity of picture frequencies.

Ring Indicator of Telephone Line Circuit by LM555

The circuit has been designed for telephone apparatus to indicate an incoming call as it rings using an LED for visual indication.

Frequency Multiplier for Low Frequency with Noise Rejection

The circuit was designed to produce a frequency multiplier for low frequency from the measurement of their signals while eliminating the noise that comes with them.

Electronic Dice Circuit

The circuit is designed to produce a dice that can be operated electronically and digitally just like the function of a normal dice.

Telephone Spy Conversation Recording Circuit

The circuit aims to create a recording scheme not only for spying but for business purposes where conversations are noted for future reference.

Electronic Key Operated Security Door

The simple circuit was designed to create a security option for entering a door that would require electronic key inputs.