In this article I will comprehensively discuss a relatively accurate electronic heart rate sensor circuit processed by a few discretely wired opamp circuit stages, and subsequently we’ll learn how this can be modified for making a heart rate monitor alarm circuit. Using IR Photodiode Sensors The sensing of the heart pulses is basically done by […]
Newly Updated Circuit Projects:
Ultraviolet UV Water Filter/Purifier Circuit at Home
The post describes an easy method of making an ultra violet water purifier circuit using ordinary electronic components. How UV is Used as Germicidal Ultraviolet germicidal irradiation (UVGI) is a water treatment method which employs UV or ultraviolet light rays in the range of short wavelength in order to eliminate the present pathogens and microorganisms. The technology involves […]
4 Universal Electronic Thermometer Circuits
Here I have explained four best electronic thermometer circuits which can be universally used for measuring body temperatures or atmospheric room temperatures ranging from zero degrees to 50 degrees Celsius. In the previous post I explained some of the features of the outstanding temperature sensor chip LM35, which gives outputs in varying voltages that’s directly […]
Bluetooth Stethoscope Circuit
In situations as critical as a COVID-19 pandemic, a doctor is the one personnel who is the most susceptible to getting infected by the virus from a patient. Therefore, doctors are being continually offered and equipped with many advanced and high tech devices in an effort to guarantee maximum safety to their life and health. […]
Electronic Ballast Circuit for UV Germicidal Lamps
In this post I have explained the construction of a DC UV germicidal lamp ballast circuit which can be used for driving any standard 20 watt UV lamp through a 12 V DC source. Although, the proposed ballast design was originally meant for illuminating a regular 20 watt fluorescent tube light, this can be also […]
Audible Meditation Timer Circuit
In this post I will show how to construct a timer circuit for meditation practices which gives out beeping sound between 1 and 9 seconds (user selectable) and this beeping audio can be integrated with your mediation session, we will see how we can integrate the periodic beeping with “mindfulness meditation” as example in later […]