Lightspeed Passive Attenuator DIY Project

Daily Timer with Binary Display by PIC16F630

The circuit is featuring a binary display on a daily timer since the evolution of binary clocks, which have been used for planning time ON and time OFF using a relay.

Electronic Tag Reader of 125 KHz RFID

The circuit was built to read and decode the RFID tags with 125 KHz frequency using a single low cost ATtiny2313 ATMEL microcontroller.

RF Remote Control with 3 Channels by PIC12F509

An ultra small wireless transmitter TLP434 is being employed by the RF transmitter module with a frequency of 433.92 MHz. This is ideal for data transfers to a remote object and remote control projects.

Thermostat Heating System

The purpose of the creation of this circuit is to provide a control over a central heating plan or a heating system by maintaining the indoor temperature at constant value regardless of the temperature change from the outside.

Sound Meter with Piezoelectric Feature

The sound meter was built with piezoelectric buzzer in reverse, as a microphone which makes a single transistor amplifier demonstrate its functionality.