Step 2: Background: How the Wireless Doorbell Receiver Works

The circuit of the wireless receiver is divided into five main parts.

1. The Radio Receiver: This section filters and amplifies the incoming radio signal.
2. The Decoder Array: This array of jumpers is used to set either the device's tuning frequency or the security code on the IC chip. This helps to prevent it from interfering with other nearby wireless devices.
3. The IC Chip: The IC Chip monitors the incoming signal and detects when the button on the transmitter has been pressed. When the signal is detected, it sends a tone to the speaker.
4. The Volume Control: This is a simple transistor amplifier that uses a variable resistor to set the speaker volume.
5. The Speaker: The speaker is a plain 0.25W speaker. It is wired between the positive supply voltage and the volume control transistor.
What size capacitor should I use to fix the stutter and playback interruption? I ripped a random one out of a broken toy, and it's obviously way too big, because it takes like, 13 minutes to drain before it will play again. Also, I figured while I had "the doorbell of eternal flatulence" opened up again, I wanted to beef up the little speaker by adding in a sparkfun audio amplifier with an added 15k resistor to raise the gain by 20. I also switched out the crappy mic with an 1/8" audio jack so I can directly line in for recordings. I'll let you know how these additions worked out... but only if you tell me what freaking size capacitor I need.
<p>Just try to find a smaller capacitor. It doesn't need to be anything specific. Just find one that will work for you.</p>
Rather than use the supplied microphone to record the tone, can I attach a 1/8&quot; aux cord to record the tone straight from my iPod/phone?
Maybe. I don't know. I have never tried that before. If you try it let me know if it works.
Here is my doorbell board.
<p>You are using a plug-in door bell. The system that I designed was for a battery powered door bell. So I can make no guarantees about how it should be set up. The only thing that I could suggest is that you might get it working by connecting the negative wire to the emitter of the speaker transistor. So you would have one wire connected to the collector and one wire connected to the emitter. But I make no promises. Proceed at your own risk.</p>
I did it!! I ended up buying a battery powered unit. The sound quality is pretty bad. Is that due to the speaker that comes on the recorder or the chip itself? Would swapping out to a better/bigger speaker make a difference?
<p>Yeah. That is a pretty cheap speaker. Replacing it will improve the quality a little bit. But it will still be a mono wav file. So it won't ever have great clarity.</p>
I did get it to work! but for whatever reason, sometimes when I hit tecord, it would tell my phone that the &quot;war oh ones were diconnected.&quot; kind of a pain, but eventually timed it right to get the recording on there.<br><br>The issue I'm having now, is where to connect the negative wire from the 9v battery. My doorbell plugs into the wall, so there are no batteries. I've zapped 2 recorders by piting that wire in the wrong place. here is a picture of the circuit board. Should the (-) 9v wire be connected to the Hot or Nutral wire?
edit: &quot;earphones,&quot; not &quot;war oh hones&quot;
<p>Hi, I have a question about this. What 2 points on the circuit board would you jumper to make this doorbell ring manually? I do have the wireless doorbell button, but I need to find a way to &quot;manually&quot; jumper this circuit board and make the chime go off without the wireless button. I'm doing a different project that requires the chime to be triggered with a &quot;closed&quot; signal sent thru 2 wires directly to the circuit board, from one of my home automation devices (an I/O Linc). Basically all I need to do is find a way to manually jumper the board to make the chime to go off. Thanks in advance!</p>
<p>Each board is a little different. Send me a close up picture of both sides of the board on the doorbell reciever.</p>
I love this idea, great instructable! I did have a quick question, I'm working on transforming my front door from what it is now to look like the blue phone box from Doctor Who. Something like this would be perfect so that I could record the TARDIS sound and have it play when someone rings the bell. My only question is, how could I go about doing that so it sounds loud and clear? Either way I'll try your instructable and let you know how it goes. Can't believe there aren't more customize-able ones out there. Thanks again!
There are a few commercial version available but thet are a little more expensive,<br><br>Example:<br>https://www.google.com/shopping/product/11141394869277110590?q=mp3+doorbell&amp;rlz=1C1CHFX_enUS492US492&amp;bav=on.2,or.r_cp.r_qf.&amp;bvm=bv.48705608,d.aWc&amp;biw=1241&amp;bih=606&amp;tch=1&amp;ech=1&amp;psi=ncPTUeDADuTeyAHxo4H4Ag.1372832661395.3&amp;sa=X&amp;ei=p8PTUcffNKSuyQGLjYCQBg&amp;ved=0CFkQ8gIwAA<br><br>http://dx.com/p/wireless-mp3-doorbell-door-chime-transmitter-receiver-set-black-1-x-cr2032-3-x-aa-197511?utm_source=GoogleShoppingUS&amp;utm_medium=CPC&amp;utm_content=197511&amp;utm_campaign=1029&amp;gclid=CIP8vK_YkrgCFc8WMgodeRIA9g<br><br>http://www.hsn.com/products/swann-wireless-mp3-music-doorbell/6746305?sz=6&amp;sf=EC0463&amp;ac=INCEC0463&amp;cm_mmc=Shopping%20Engine-_-PLA-_-Electronics-_-6746305&amp;channel=Froogle&amp;mr:referralID=50729a72-e3a9-11e2-9389-001b2166c62d
Is this ripped from here? <a href="http://make.dozuki.com/Project/history/2867/now" rel="nofollow">http://make.dozuki.com/Project/history/2867/now</a>
I post all of my projects to Instructables, Make Projects, and DIYHacksAndHowTos.com
The author is just moving them over from Make and his personal website. :)
Congratulations on being a finalist in the DIY Audio Contest!! Good luck to you!
You are a thief this project site? http://makeprojects.com/
That was a little embarrassing... :P
I see that you have come across my MakeProjects account. I am an active member of both communities and I post all of my projects to both websites. I appreciate your concern.
i liked th wooden box....i had the same doorbell and never thought to close it in a box....is neat.
This is a cool How to. The doorbell with the wood on the sides is a Heath Zenith 8-Note Melody Wireless Doorbell. I have one and that's why this instructable caught my eye. <br> <br>Frank
Hey, <br> <br>Could you give more details on the original doorbell? I've had a devil of a time finding a good one... <br> <br>thanks, <br>Scott
Unfortunately, I have no idea what brands or models that I used. I moved into a new house and there were two wireless doorbells there. The circuits were really similar in terms of how they activated the buzzer. So I assume that it is a pretty common design. The setup that I used will work as long as the ringer is using a transistor to short the negative terminal of the speaker to ground.
Great idea, and really so simple. Now add an amp to drive a larger speaker.
Can one just &quot;jumper&quot; the original speaker wiring to make the recorder play at a remote (additional) location (like the basement or laundry room)?
I used a wireless doorbell, so you are free to put it anywhere. But it would only work for one location. If you wanted to add a second ringer, you would need to get an additional receiver and recording module and then match the encoding combination on the receiver board.
Next step: RFID. Each family member gets a different ringtone, so you know who's at the door without a peephole! :-)
This is great.

About This Instructable




Bio: My name is Jason Poel Smith I am a Community Manager here at Instructables. In my free time, I am an Inventor, Maker, Hacker, Tinker ... More »
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