An electronic adjustable thermostat controls temperature in heating or cooling systems, as this adjustable thermostat circuit uses the low-power IC LM56 chip to switch between two temperature modes. First, it controls outside transistor for output load and then IC LM56 give reliable, precise temperature control. Moreover, it is good for many uses like check temperature […]
Sensors and Detectors
Simple LED Alert for Telephone Off-Hook Detection Circuit
This simple LED circuit detects voltage drops when we lift the handset, actively turning ON an LED to show that our telephone is in use. Also, circuit is good for old phones with no light alert and it is very useful for shared phones and stops call interruptions. Here, circuit runs on simple 3V battery […]
Mobile Incoming Call Detector Circuit
Mobile Incoming Call Detector Circuit is a smart project, which detect incoming call and make LED light up. Circuit is good for noisy places where ringtone is hard to hear and can catch RF signal from phone when call comes. In addition, the circuit uses LC circuit, transistor, 555 timer to turn ON LED and […]
DIY Water Level Monitoring Circuit
DIY Water Level Monitoring Circuit is good for tank or reservoir, it use IC 555 timer in astable mode and make repeated signal, hence, when water reaches a set level then buzzer turns ON. Also, the circuit helps to stop water overflow and is useful in home, factory and farm. Circuit Working: Parts List: Components […]
Metal Detector Circuit using IC CS209A
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 […]
Simple Light to Frequency Converter Circuit using Timer IC 555
Simple Light to Frequency Converter Circuit using Timer IC 555 changes light brightness into frequency signal, it is useful for light measure, optic sensing and automation. Also, circuit uses IC 555 timer in astable mode and photodiode to catch light, as more light means more frequency which is easy to see link between light and […]