![how to turn on cambridge radio bluetooth how to turn on cambridge radio bluetooth](https://cdn.mos.cms.futurecdn.net/b99ca0bd36c7c014b2f67b88a1bbd1bb.jpg)
- #How to turn on cambridge radio bluetooth how to#
- #How to turn on cambridge radio bluetooth full#
- #How to turn on cambridge radio bluetooth Bluetooth#
There will probably also be a dot or some other type of marking on that corner. This is the 90 degree corner (the other 3 are rounded). Pin 1 (bottom left corner) is not connected to anything.Oscillator Connections for the Transmitter But if your ransformer is not marked in any way, it will not hurt anything to plug it in and test both sides. In my case the low side of the transformer has a smaller plug which made it easy to figure out.
#How to turn on cambridge radio bluetooth Bluetooth#
The speaker wires from the Bluetooth module get plugged into the low side of the transformer. Using the diagram above, here is how you will build the transmitter and hook the Bluetooth module to it.
![how to turn on cambridge radio bluetooth how to turn on cambridge radio bluetooth](https://i.imgur.com/Dw1LWx0.png)
You can actually use any oscillator that will put your signal in the AM band, but the 1 Mhz ones are fairly easy to find on eBay. The type of crystal with 2 legs (that you can find on a computer motherboard) is just the crystal and does not have the circuitry to make it oscillate.
#How to turn on cambridge radio bluetooth full#
The kind we are using for this is called a full can crystal oscillator. And, if a video explanation helps, here is the same transmitter on YouTube. Here is one that takes more time to explain the details of how it all works, but is essentially the exact same transmitter as the previous link. Here is a basic transmitter that will get you going. If my instructions are not clear, then maybe you will benefit from reading someone else's way of saying it. I include links to them here because I am building the exact same transmitter.
#How to turn on cambridge radio bluetooth how to#
There are a couple of other Instructables that teach how to build the type of transmitter I am using. I can also plug my computer’s audio into the transmitter using an ⅛” audio jack on the Bluetooth speaker if necessary. In this Instructable I will show you how I paired the AM transmitter project with a basic Bluetooth speaker and how I am able to play audio on my phone wirelessly to the radio. (This project is a remix of bmlbytes' transmitter.) So I bought a 1 Mhz crystal oscillator and worked on building one of the projects based on that. I tried one using a 555 timer but was not able to get it to work the way I expected it to. I was able to find a couple of projects for building an AM transmitter. So I searched around for a personal AM transmitter and found they weren’t readily available. But back when my Hallicrafters radio was built (this model was produced from 1947 to 1953), AM was still the common mode for radio. FM works very well for this purpose even if it isn’t perfect. Many of you have probably used an FM transmitter to send audio from a phone to an FM radio in a car. So I thought about finding a way to broadcast from my phone to the radio using a radio transmitter. But, having worked with 110 V AC-powered tube amps in the past, I knew that I really didn’t want to mess with mains power directly. I immediately started thinking about how I could modify the radio so that I could play music from my phone or computer through the tube amplifier. I was recently given a Hallicrafters S-38B radio receiver that had been rescued from a flood but was otherwise was doomed to be thrown out. Or, Broadcast to an Old AM Radio Using Bluetooth