Electronics circuits

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IR Remote Control

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DIGITAL STOP WATCH

Here’s a digital stop watch built around timer IC LM555 and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926). IC MM74C926 consists of a 4-digit counter, an internal output latch, npn output sourcing drivers …

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Power supply failure alarm

Most of the power supply failure indicator circuits need a separate power supply for themselves. But the alarm circuit presented here needs no additional supply source. It employs an electrolytic capacitor to store adequate charge, …

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Rain Alarm

This circuit gives out an alarm when its sensor is wetted by water. A 555 astable multivibrator is used here which gives a tone of about 1kHz upon detecting water. The sensor when wetted by …

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Fridge Door Alarm Circuit

This fridge door alarm is using a 3V battery supply should be placed (in a small box) in the fridge near the lamp or close to the opening. With the door closed the photo resistor …

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Infrared Beam Break Detector

Application An infrared detector that sounds a buzzer when an IR beam is broken, meaning the IR signal is lost. A pulsed IR signal generator is necessary, but not included in this post. This project …

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Common Types of Relay

    You can choose from a wide range of relays but do you know what type to use in your project? Well, sometimes is hard to choose, especially if you’re not sure which model …

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dijital termometre devresi

Termometre devresinin beslemesi tek kaynak 5 volt sıcaklık sensörü olarak bc547b kullanılmış p1 ve p2 trimpotları ile kalibrasyon yapılıyor gösterge için iki adet HD-A544Dled display kullanılmış 2 faklı pcb bulunmakta yukarıda ki resimde gördüğünüz ve besleme, kontrol, display katlarının ayrı modüller halinde olanını aşağıdaki linkte bulabilirsiniz. …

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Arduino