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Wireless Call Bell

This is a wireless musical call bell system built around a 433MHz RF transmitter/receiver module. This circuit does not use any microcontroller, and the entire system builts using 4000 series CMOS logic ICs, NE555 timer, and low power AF amplifier. This video shows all the steps of this project including soldering, mounting, wiring, and testing the wireless call bell system. Additional information on this project, including the schematic and PCB design files, are available at http://jayakody2000lk.blogspot.com/20.... Content of the video: 00:00 - PCB of the wireless musical call bell system 00:07 - Soldering IC sockets 00:18 - Soldering jumper 02:02 - Soldering resistors 03:03 - Soldering capacitors 03:54 - Soldering electrolytic capacitors 04:08 - Soldering 3.0V Zener diode 04:14 - Soldering 2.54mm female header 04:23 - Soldering 2N3904 transistors and UM66 IC 04:54 - Attaching DIP ICs 05:08 - Finalizing the PCB assembly 05:28 - Preparing the front panel of the enclosure 06:05 - Attaching the speaker and other front panel components 06:58 - DC jack mount 07:19 - 433MHz helical antenna construction 08:07 - Connecting antenna to the receiver module 08:28 - PCB mounting 09:03 - Mounting the DC jack socket 09:19 - Connecting front panel components with PCB 09:42 - Finishing the assembling process 10:00 - Testing the musical call bell system