The Metal Detector Circuit using the CS209A IC is a useful tool for detecting nearby metal objects. People use it for security screening, treasure hunting and industrial applications, also this article explains a simple yet effective metal detector circuit based on a single CS209A chip. The circuit is easy to build and provides reliable metal […]
DIY Projects
Canary Bird Chirp Generator Circuit
Canary Bird Chirp Generator Circuit is fun and easy circuit, it make sound like real canary bird chirping and it works like audio oscillator to copy bird sound. In addition, toys, sound gadgets and DIY projects use this circuit to generate sound effects and, also, a 9 V battery powers the circuit, making it easy […]
Jet Engine Sound Generator Circuit using IC HT2844P
Jet Engine Sound Generator Circuit using IC HT2844P is fun learning project and it makes jet engine sound using simple parts. Furthermore, it uses IC HT2844P sound chip to make real jet noise which is good for model fans, school work or DIY fun; also circuit needs 3V power and keeps under 3.3V or else circuit […]
Subwoofer Low Pass Filter Circuit using Op-Amp TL062
Subwoofer Low Pass Filter Circuit using Op-Amp TL062 that let low sound go and block high sound, also this circuit is good for subwoofers which gives deep and strong bass. The circuit uses TL062 op-amp which is active for low pass type and it cut high sound and keep bass clean and loud. Also, STMicroelectronics […]
LM331 Based Frequency to Voltage Converter Circuit
A simple F/V converter is a useful circuit that converts signals of different frequencies into corresponding DC voltages, and people use it in many applications, including tachometers, speedometers and industrial machines. LM331 is popular IC for this and it can do both V/F and F/V and it is very accurate and very flexible, here LM331 […]
Frequency to Voltage Converter Circuit using IC TC9400
Frequency to Voltage Converter Circuit using IC TC9400 is useful in signal work, motor speed control and sensor connect. It takes frequency signal and gives voltage output and this helps to read and use frequency as voltage in many ways. Also, the circuit operates from a 10–15 V DC power supply, the circuit diagram uses […]