Pulse frequency counter count signal in hertz (Hz) and it is an important tool in electronics. Now Arduino and other microcontroller make counter easy and cheap. So, this article for Simple Pulse Frequency Counter Circuit with Arduino show how to make this easy circuit with few parts; also we have used IC 555 to make […]
555 Timer Projects
Hysteresis in Schmitt Trigger Circuit using IC 555
Schmitt Trigger is special type of comparator, which gives stable switching even if input signal is noisy or slow. We can use a 555 timer IC as a Schmitt trigger and it is also used in many projects. Furthermore, a Schmitt trigger provides two types of output: normal (non-inverting) and inverted square waves. Next, we […]
Build Your Own Door Knob Touch Alarm Circuit
Todays time safety is very important, so this Build Your Own Door Knob Touch Alarm Circuit can help protect home and office. Also, this small project is Door Knob Touch Alarm using 555 IC, which can sense when someone touches the door knob. Furthermore, if someone touches then alarm makes loud sound and it scares […]
Simple Positive Voltage to Negative Voltage Converter Circuit
This article for Simple Positive Voltage to Negative Voltage Converter Circuits shows how to change positive DC voltage to negative DC voltage using special converter circuit; also this circuit is useful for many electronic things. One popular and easy way to generate a clock signal is to use the IC 555; also this reliable IC […]
Fire Alarm Circuit using Thermistor and IC 555
The Fire Alarm Circuit using Thermistor and IC 555 help to find and warn people about fire, as this design uses IC 555 and thermistor to check temperature change and maybe fire. Furthermore, thermistor is special part which feels the temperature change, also circuit is easy to make and thermistor changes resistance with heat and […]
Power ON Delay Circuit
To begin with, Power ON Delay Circuit using IC 555 give time gap between power ON and circuit starts. When trigger comes, IC 555 work in monostable mode and give one output pulse for set time; furthermore, resistor R1 and capacitor C2 make timing part for delay. When the circuit is OFF, the output stays […]