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Showing posts with label BC548. Show all posts
Showing posts with label BC548. Show all posts

Clap Switch Circuit Diagram Project

This is a simple clap switch circuit diagram project. If you are a beginner electronics learner, and love to do new project experiment then this is a great circuit for you.  This circuit can on/off a 220V electronic device like fan, lamp by the sound of clap.

Circuit diagram of clap switch


Water Sensor Circuit Diagram using IC 555

This is a water sensor /rain alarm circuit diagram; it can be used on motorcycle, car or other device that we want to protect from water, rain.
This is a simple water sensor/rain alarm circuit that makes an alarm when water/rain falls on its sensor. This circuit is based on NE555/LM555 IC and two transistors (Q1&Q2). For  transistor Q1- BC547 or BC107 and for Q2-  2N825,BC548 or BC168 can be used in the circuit. This rain detector circuit can be supplied from voltage source of +9V-12V DC. The resistor 470K ohm is a POT/Variable resistor; it is used to adjust the sensitivity of water/rain sensor. Use a 8 ohm,0.5w-1W  speaker to hearing  better alarm. Less than 8 ohm speaker could be harmful for the IC 555.

Circuit Diagram of Water Sensor

Fig-1: Water Sensor/Rain alarm circuit diagram

Heat Sensor Circuit Diagram

This simple heat sensor circuit could senses heat from various electronics device like computer, amplifier etc. and generate warning alarm. It could senses heat from environment also, but here I mention “electronics device” because it is being using mostly in electronic device to protect them from overheat.

Circuit diagram of heat sensor:

Fig-1: Schematic Circuit Diagram Of Heat/Temperature Sensor

Song-Music generator circuit using ic UM66

This is a simple (song) music generator circuit using ic UM66. To make a musical calling-bell, door-bell, kids toys etc. we can use this funny audio/sound/music/tone generator ic UM66. The UM66 series are CMOS IC’s, they has a built in ROM to store the music. The IC operates in DC +3V. We suggest to use two dry cell (1.5V X 2) for +3V Supply.  For Q1 use a TO-92 type NPN transistor like BC548, BC168, BC183, BC238, 2N2222. Speaker must be 4Ω or higher.

Circuit Diagram of Music generator using ic UM66: 

Fig: Circuit Diagram of Song-Music generator using IC-UM66


UM66TXX series IC generate different songs-music, the song-music depends on the model of UM66TXX series IC’s. The song-music are listed below with model number.
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