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Holtek WAS-2271EN Manual

2.4ghz self-powered wireless doorbell
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2.4GHz Self-powered Wireless Doorbell
D/N: WAS-2271EN
Introduction
Self-powered wireless doorbells use radio transmission and which provide the doorbell power
supply using a self-powered architecture, without requiring wiring and a battery power source. Self-
powered wireless doorbells include two parts, a transmitter to send a doorbell signal and a
transponder to receive the signal and then provide a response to generate a doorbell sound.
For such applications, Holtek has a 2.4GHz self-powered wireless doorbell solution. Here the
doorbell uses a self-powered architecture combined with a 2.4GHz transmitter-only device, the
BC5161. The transponder uses a 2.4GHz receiver module, the BM5602-60-1, and a microcontroller
with an integrated voice function, the HT66FV140.
Applications
Wireless doorbells, wireless ordering bells, wireless switches.
WAS-2271EN V1.00
2.4GHz Self-powered Wireless Doorbell
Figure 1. System Block Diagram
1 / 12
December 12, 2022

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Summary of Contents for Holtek WAS-2271EN

  • Page 1 For such applications, Holtek has a 2.4GHz self-powered wireless doorbell solution. Here the doorbell uses a self-powered architecture combined with a 2.4GHz transmitter-only device, the BC5161.

  • Page 2: Operating Principle

    Alternatively it can also be used to raise an alarm. Figure 2 WAS-2271EN V1.00 2 / 12 December 12, 2022...

  • Page 3: Functional Description

     Number of connected doorbells: up to 4  Power supply mode: 220V/50Hz Solution Functions The following figures show the outlines for a self-powered doorbell product. Self-powered Architecture Power Supply Interface Indicator Figure 3. Transmitter Main Components WAS-2271EN V1.00 3 / 12 December 12, 2022...
  • Page 4 On the transponder, press the Volume+ key and release it to increase the volume by one level. Press the Volume- key and release it to decrease the volume by one level. In this way it will switch among five different volume levels. WAS-2271EN V1.00 4 / 12 December 12, 2022...

  • Page 5: Reference Design Description

    BC5161 will enter the transmitting state immediately after receiving power and continue transmitting until the energy is fully consumed after which it will return to the power off state. WAS-2271EN V1.00 5 / 12 December 12, 2022...
  • Page 6 Figure 7 and Figure 8 show the doorbell transmitter PCB Layout top and bottom layers. Figure 9 and Figure 10 show the transponder PCB Layout top and bottom layers. Figure 7 Figure 8 WAS-2271EN V1.00 6 / 12 December 12, 2022...
  • Page 7 2.4GHz Self-powered Wireless Doorbell Figure 9 Figure 10 PCB BOM List Table 1. Transmitter BOM List WAS-2271EN V1.00 7 / 12 December 12, 2022...
  • Page 8 2.4GHz Self-powered Wireless Doorbell Table 2. Transponder BOM List WAS-2271EN V1.00 8 / 12 December 12, 2022...
  • Page 9 If a voice is being played, it will check whether the voice data in the Flash has been played. If it has been played, it will turn off the internal power amplifier and the external LED and then return to the main program. WAS-2271EN V1.00 9 / 12 December 12, 2022...
  • Page 10 Enter Pairing mode, turn on power keys pressed Simultaneously ? amplifier, LED remains on Stop & Switch Clear address, turn off power keys pressed Simultaneously ? amplifier, LED flashes 3 times Figure 12. Key Action Flowchart WAS-2271EN V1.00 10 / 12 December 12, 2022...
  • Page 11 Conclusion This document has introduced a 2.4GHz self-powered doorbell solution implemented using the Holtek BC5161, BM5602-60-1 and HT66FV140 devices. The BC5161 is a 2.4GHz transmitter which includes an integrated encoder. The self-powered doorbell function eliminates the need for a transmitter power source. The BM5602-60-1 is a 2.4GHz GFSK transceiver, which can decode the RF signals received from the BC5161 transmitter automatically.

  • Page 12: Reference Material

    Information displayed at such sites. Hyperlinks to other websites are at your own risk. Limitation of Liability In no event shall Holtek Limited be liable to any other party for any loss or damage whatsoever or howsoever caused directly or indirectly in connection with your access to or use of this website, the content thereon or any goods, materials or services.