Electronics Schematic Diagram alarm Door Bell circuit using NE555 The main part of this doorbell circuit are two NE555 timer ICs.When some one presses switch S1 momentarily ,the loud speaker sounds a bell tone as long as the time period of the monostable multivibrator built around IC1. When the switch S1 pressed, IC1 is triggered […]
Posts tagged NE555
Cell Phone / mobile phones Detector circuit using CA3130, NE555, BC548
Cell Phone Detector circuit using CA3130, NE555, BC548 This detector functions let you know that nearby there are phones that activated from a distance of five feet. So that can be used to prevent the use of mobile phones in the exam room, secret room, a place of worship, etc. It is also useful to […]
Making inverter technology for Car
Making inverter technology for Car Inverter is a series of functions to change the dc voltage into ac voltage. One of the purposes inverter that is popular enough to raise the dc voltage of 12 to be 220 Vac. after the change in voltage from 12 Vdc into 12 Vac, and the increase in the […]
Power Amplifier Circuit
Power Amplifier Circuit Diagram using LM1875
Which technique uses in IR remote control systems?
harsh2035 asked: IR remote system uses in TV, DVD players etc.. is very sensitive, gives perfect result from some distance. When I tried to make very simple remote system which can be found on “http://www.electronic-circuits-diagrams.com/alarmsimages/alarmsckt19.shtml”, it results very less sensitivity, when emitter is almost 2m apart from sensor it stops to respond. Moreover it consumes […]
Electronics Circuit Programmable LED light
Electronics Circuit Programmable LED light circuit diagram flashing LED that, after a preset number of flashes will illuminate steadily until P1 Reset Parts: R1______________10K 1/4W R2_______________1M 1/4W R3_______________1K 1/4W C1_______________4µ7 25V C2______________10nF 63V D1___________1N4148 75V 150mA D2______________LED IC1____________4060 B1______________3V to 15V Battery
