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 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

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