The circuit, consisting of an infrared transmitter-receiver pair, utilizes IR beam transmission to switch the toy car ‘on’ or ‘off’, yeah… it will be only switching on and switching off, you may modify this circuit to make the toy car to turn left or right. To operate the toy car, you have to hold the transmitter in your hand, trying to keep it pointed at the toy car which has [...]
This is the circuit diagram of seismic / vibration sensor. The circuit simulates a seismic sensor to detect vibrations/sounds. It’s really sensitive and may detect vibrations due to the motion of animals or human beings. So it could be utilized to monitor protected locations to restrict entry of undesirable individuals or animals. The circuit applies readily available electronic parts and the circuit design is simple. A common piezo sensor is [...]
Above circuit design is thermocouple amplifier circuit using CA3193 operating amplifier. The CA3193 is an excellent choice for use with thermocouples. In the circuit, the CA3193 amplifies the generated signal 500 times. The three 22MΩ resistors will provide full-scale output if the thermocouple opens.
This is a ultrasonic motion detector (or movement detector) circuit. The circuit claimed has a high movement sensitivity. Even air moving (hot air rising, wind blowing) will trigger it when the trimpot is set near the most sensitive position. The transmitter sends out a steady ultrasonic tone at 40kHz. At this frequency the wavelength is about 6 mm. Any reflected sound is detected by ultrasonic receiver. The signal is then [...]
