Electronics! Falling into the geek rabbit hole.

[Core Shot]

Holy jeebus
I’m jealous

[basinbeater]

No ham. Just like playing cracker loud in the living room.



sent from Utah.

[fatnslow]

Sounds like some folks with stereo knowledge here. I have a Kenwood car stereo that turns off after 5-10 minutes and won't come back on until the next car start. I have taken a look at the power and it seems just fine. Do car decks have some sort of thermal fuse link that can cause something like this ? I actually know my way around electronics a bit so just looking for some direction bsinc I can't seem to find any info online and would rather try repair than replace.

[basinbeater]

It may be getting hot, and some ic that is involved in the power circuitry is shutting down, or an amp piece is getting hot and triggering the power supply to shut down. Toss it and get another one. Each of my 5 cars has a $40 used pioneer deck.

sent from Utah.

[abraham]

My guess would be a cracked solder joint that fails after the board/part is heated enough. Could waste a ton of time troubleshooting a problem like that

[basinbeater]

My power supply on my diy amp is together and putting out the right voltage.
I've retained the arcam factory soft start circuitry, as well as the other power supplies should I want to add things like an active crossover circuit, etc... I had to trick the startup board that controls the relays for the transformers into thinking it was getting the right signal from the (removed) cpu that controlled everything in the arcam. With that trick in place, it fires up like it is supposed to, and I get +-63.3v at the rails that will power the amp. The power supply cap board also serves as the star ground for all amp related circuits. Voltages shown are with a bad LED. with that fixed I get the 63.3 value. More power!


sent from Utah.

[CarlMega]

My guess would be a cracked solder joint that fails after the board/part is heated enough. Could waste a ton of time troubleshooting a problem like that

Cold solder joints are almost fun when you can see them or detect & repair them. Great solder practice. However, multilayer PCB with conductive glue are no fun at all...micro breaks that are essentially in-between layers are maddening.

So try if you want or are interest, or jsut toss if you want "results"..lol.

Solid work basin btw. I enjoy your posts here - great project.

[basinbeater]

I'm surprised at how much fun this stuff is. I'm trying to get a simulation of the amp circuit up and running. Someone else built it along with a virtual test bench, that when I get to trying to design my own stuff, will be very handy. Instead of futzing around with a breadboard and little wires, you just build it on the computer and see if it works, and tweak it there. When you like what you get, test it in real life. This stuff is all like a big puzzle.

sent from Utah.

[basinbeater]

Making progress. One side of the amp is finished being built. We'll fire it up tonight and adjust and see if the smoke stays inside. All electronics run on smoke, and when you let it out, then it won't work anymore.


sent from Utah.

[The Reverend Floater]

Yup. Basin got mad man-skills. Jealous.

[ötzi]

On a slightly lower level of sophistication, i need a cheap-ass tablet to live in a closet and play music from wifi over the stereo. That's all it will ever need to do. Cheap and works are the only words I really care about. What should I buy online right now while I'm thinking of it?

[El Chupacabra]

On a slightly lower level of sophistication, i need a cheap-ass tablet to live in a closet and play music from wifi over the stereo. That's all it will ever need to do. Cheap and works are the only words I really care about. What should I buy online right now while I'm thinking of it?

Would an Amazon Echo Dot or Google Home Mini work?

[ötzi]

Well I dunno it just needs be Android or ios so I can put a couple apps for internet radio on it and have a 3.5 mm headphone jack. An old iphone would work actually fine. I had an android tablet that I bought on Amazon for literally $27.00 that was a complete piece of shit but worked for a year before it crapped out completely. edit: I looked those two up Chup, they're not what I'm looking for but thanks.

[Touring_Sedan]

I picked up two ONN 10 inch tablets refurbished on eBay for under $100 ea. They're Walmart's house brand. The kids, 6 & 3, have been using them CONSTANTLY for the last 8 months. It's unreal, apparently they're bulletproof, and might cure cancer.

[basinbeater]

Victory is mine! For one channel anyways. Check it out! Source is laptop, to Sony preamp, to honey badger amp board. Took my sweet ass time adjusting the DC offset to around 1mv, bias to about 20mv. Made sure the input tail current was around 3.5ma. everything checked out, moved the plug to unprotected ac wall plug, and she works! Gotta work on the other side now and do some more building to get the case stuff wrapped up. But it's alive!

https://youtu.be/aKxUZ2CA1_U

sent from Utah.