John John Vu
UKRAINE • + Follow
Download BOM(Bill of materials)
Apr 25,2024
593 views
end-flag

Speaker Turn-On Delay and DC Protector

593
2
9
Published: Apr 25,2024
Add to cart

*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.

Copy this HTML into your page to embed a link to order this shared project
Copy
Copyright Info

Attribution-ShareAlike (CC BY-SA) License

Read More⇒
Under the Attribution-ShareAlike (CC BY-SA) License.
gift
Smart Soldering Iron TS101-BC2
BUY NOW
gift
Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen（Without Speaker）
BUY NOW
gift
ESP32-S3 4.3inch Capacitive Touch Display Development Board, 800×480, 5-point Touch, 32-bit LX7 Dual-core Processor
BUY NOW
gift
MHP50-B5 Mini Hot Plate Preheater
BUY NOW
gift
Smart Soldering Iron TS101-BC2
BUY NOW
gift
Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen（Without Speaker）
BUY NOW
Topic
Audio
  • Comments(9)
  • Likes(2)
Upload photo
You can only upload 5 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP
0 / 10000

  • I was trying to ask what is the purpose of "prot" in photo?  Test point? 

    Feb 22,20252 Comments
    John John Vu 2025-02-23 00:50:23Reply

    This is a test point. From this point you can take a signal for indication.

    Joel TLA 2025-02-23 03:13:47Reply
    Reply@ John John Vu：

    Thanks.  My board functions properly. Mounted to binding posts is a good design.. I will implement several boards..

    Reply

  • Also what is the purpose of "detect" at DC power connection?

    Feb 21,20251 Comments
    John John Vu 2025-02-22 01:16:23Reply

    I did not quite understand the question. 
    The supply voltage for this circuit is supplied from a separate source. Protection works with DC voltage at the output of the amplifier 1.5...1.8V.
    The time through which the relay connects acoustics depends on the capacitance of the capacitor 220 (470).

    Reply

  • The relay that is in your photo of assembled board is   https://www.alldatasheet.com/datasheet-pdf/view/1134268/SONGLERELAY/SMIH-24VDC-SL-C.html
    Just like mine so not sure how yours can operate unless mix up with spec sheets.

    Anyway I'll look for relays you show now.. Thank you

    Feb 21,20251 Comments
    John John Vu 2025-02-22 01:10:14Reply

    I deleted this photo, there were wrong relay.

    Reply

  • Am I missing something? I have a connection from IN to OUT "without" power connected. In the photo I marked the 2 connections with a black marker.
    I'm showing the relay configuration.  It looks like the 2 marked connection should be removed?

    thanks!

    Feb 21,20251 Comments
    John John Vu 2025-02-21 20:31:07Reply

    Relay is necessary with 2 independent groups of contact.

    Reply
VOTING 0 votes
VOTE NOW !
  • 0 USER VOTES
0.00
  • YOUR VOTE 0.00 0.00

More by John John Vu

You may also like