BuddytheReow
Breadboard Baker
Hey Guys,
Not guitar pedal related, per se, but a project I am working on. I've got some pretty good, albeit old, speakers that I'm trying to hook up to a bluetooth transmitter and amplifier that I'm going to stuff into a 125b enclosure (along with other items making this a utility box) and utilizing a 9V adapter as the primary input. From the 9V input I'll utilize charge pumps and voltage regulators. I decided to pull the trigger on these from Tayda to start with.
Here's the bluetooth module.
And here's the amplifier.
The amplifier works pretty well if I hook it up to a charge pump at ~17V or so and is loud enough for my needs. I don't think my problem is here since I've used something like this in the past.
My problem is actually with the bluetooth receiver. It's not inherently loud (hence the need for the amplifier), but it constantly puts out a 800Hz hum that is quite annoying in addition to whatever audio I put through it. Making a crude noise gate (2 diodes in parallel) cuts out to much overall signal. Adding a few kOhm resistor helps, but also quiets the output signal.
My question is pretty simple: how do I get rid of this 800Hz hum? My gut is telling me its not worth the time trying to put lipstick on a pig and I should just go find a different bluetooth chip. If that is the case, can anyone recommend a decent and inexpensive bluetooth module for audio? For reference, I'll be connecting my phone to it for some Spotify shenanigans.
Not guitar pedal related, per se, but a project I am working on. I've got some pretty good, albeit old, speakers that I'm trying to hook up to a bluetooth transmitter and amplifier that I'm going to stuff into a 125b enclosure (along with other items making this a utility box) and utilizing a 9V adapter as the primary input. From the 9V input I'll utilize charge pumps and voltage regulators. I decided to pull the trigger on these from Tayda to start with.
Here's the bluetooth module.
And here's the amplifier.
The amplifier works pretty well if I hook it up to a charge pump at ~17V or so and is loud enough for my needs. I don't think my problem is here since I've used something like this in the past.
My problem is actually with the bluetooth receiver. It's not inherently loud (hence the need for the amplifier), but it constantly puts out a 800Hz hum that is quite annoying in addition to whatever audio I put through it. Making a crude noise gate (2 diodes in parallel) cuts out to much overall signal. Adding a few kOhm resistor helps, but also quiets the output signal.
My question is pretty simple: how do I get rid of this 800Hz hum? My gut is telling me its not worth the time trying to put lipstick on a pig and I should just go find a different bluetooth chip. If that is the case, can anyone recommend a decent and inexpensive bluetooth module for audio? For reference, I'll be connecting my phone to it for some Spotify shenanigans.
