In this article we are going to see, what force sensing resistor is, their construction, specification and finally how to interface it with Arduino microcontroller. We will also study a couple of comparator circuits based on 741 and LM311 ICs, for operating a relay using force sensitive resistor. What is Force Sensing Resistor A force […]
Newly Updated Circuit Projects:
PIR Triggered Message Player Circuit
In this post we diagnose a PIR activated message player circuit, which was sent by Mr. Norman Kelley one of the dedicated followers of this blog for improvements. I have explained more about the design through the following discussions. Triggering Message Playback with a PIR Input I have been working on a project for about […]
Simple Touch Operated Potentiometer Circuit
In this touch operated potentiometer circuit we have two touch pads, which produce a slowly increasing voltage at the output when one touch pad is touched, and a decreasing voltage when the other touch pad is touched. When the touch contact is removed the voltage holds at that particular increased or decreased level “permanently”. Touch […]
Modifying XL4015 Buck Converter with an Adjustable Current Limiter
In this post I have explained a simple way to enhance the the XL4015 DC to DC buck converter with an adjustable current limiter, which seems to be missing in the original module. About XL4015 The XL4015 is a 180 KHz fixed frequency PWM buck (step-down) DC/DC converter, specially designed for operating a 5 V, […]
Switching Boost Converter Circuit using IC MAX732
The proposed boost converter circuit using MAX732 IC will allow you to have a continuous voltage of 12V with a current of 150 or 200 mA. The input voltage can be between 4.5 to 9 V, which can be produced by three 1.5V batteries, for example. The circuit is quite simple, we will be using […]
RTD Temperature Meter Circuit
In this post I have explained the making of an RTD temperature meter circuit, and also learn about different RTDs and their working principles through formulas. What’s an RTD A RTD or resistance temperature detector works by detecting the difference or an increase in the resistance of the sensor metal when it’s subjected to heat. […]