This fun sound-to-beep circuit uses the CD4049 chip and is a simple way to detect sounds. It can turn a whistle into a beeping sound! When it hears a whistle it beeps for about three seconds. You can use it for different things like door alarms remote controls, and other systems that respond to sounds. […]
Simple Dark Sensor Circuit for Security using IC 555 timer
A simple dark sensor circuit designed for security purposes uses the timer IC 555 This electronic design can detect low light levels and activate a response such as turning on a buzzer or a light. It employs a standard light-dependent resistor LDR to sense light. This circuit is quite handy for various security applications such […]
Simple USB Lamp Circuit for Portable Lighting
The basic USB Lamp Circuit is an excellent choice for portable lighting. It is user friendly and draws power from a USB port that gives 5 volts. Additionally, it features a rechargeable battery, which enhances its versatility for various portable lighting applications needs. Remember the USB port can only deliver up to 100 mA so […]
Simple Dual LED Temperature Indicator Circuit
The Simple Dual LED Temperature Indicator Circuit is designed to light up one of two LEDs depending on the temperature. It features an LM35 IC temperature sensor, a CA3130 operational amplifier and two NPN BC547 transistors. To ensure a stable 5V DC output the IC 7805 converts a 9V DC input into 5V. If you […]
Simple Headphone Amplifier Circuit using Transistors
A headphone amplifier is a basic electronic tool that boosts low audio signals allowing them to power headphones effectively. This device is handy in various audio scenarios particularly when plugging directly into an audio source does not deliver sufficient volume or clarity. The Simple Headphone Amplifier Circuit using Transistors, which we will discuss is a […]
High Current Adjustable Regulator Circuit with 30V 3A Output
In this post LM723 IC is a handy chip that helps control voltage. It gives a stable DC output and lets you change the voltage and current as you need. This special regulator can set the output voltage anywhere between 2V and 37V. It can provide up to 150mA of output current and can take […]