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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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1st Oct 2022, 7:33 pm | #1 |
Heptode
Join Date: Jul 2020
Location: Larkhall, South Lanarkshire, Scotland.
Posts: 671
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Project Gone Wrong
So i decided to add a bluetooth module to my old HI-FI, Used the CD Player's amp input and installed a switch to switch between the bluetooth module and the CD Player, So far so good, Now i had to find a 5v supply to power the module, Found a 5v supply inside the HI-FI but it was causing buzzing etc,
So i decided to knock up a 5v regulator on some stripboard using a LM317T, Have a bag of them i bought from china years ago, But the circuit kept burning up the resistors So i thought they must be fakes and ditched that idea, I went back to it today and discovered i had made a schoolboy error, So circuit all working and tested i screwed the HI-FI Back together plugged it in and nothing No power, I traced the fault to a solder splash bridging the output of the transformer, Removed the bridge still no power, Took all the screws out the HI=FI but it still wouldn't come apart but i managed to get my hand in far enough to remove the blown transformer fuse, All working now Moral of the story is don't solder over a PCB Everything that could have gone wrong did
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Help!! I've been electrocuted by a glass thing that glows |
1st Oct 2022, 8:01 pm | #2 |
Nonode
Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,315
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Re: Project Gone Wrong
The other moral of the story is perseverance! Well done for going through methodically and working out what was wrong, resulting in a successful outcome.
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1st Oct 2022, 8:14 pm | #3 |
Heptode
Join Date: Jul 2018
Location: Worthing, West Sussex, UK.
Posts: 983
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Re: Project Gone Wrong
The best and ever lasting way to learn is by mistakes, as long as it isn't too costly in any way..
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"Behind every crowd, there's a silver Moonshine" |
1st Oct 2022, 8:15 pm | #4 | |
Heptode
Join Date: Jul 2020
Location: Larkhall, South Lanarkshire, Scotland.
Posts: 671
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Re: Project Gone Wrong
Quote:
Was ready to chuck the thing in the bin after i took all the screws out and it still wouldn't come apart most probably due to lashings of hot glue from the factory, Oh and the AM bar antenna came free from it's mounting point due to me removing a screw which i thought at the time was holding the PCB in the casing, Luckily none of the wires broke off
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Help!! I've been electrocuted by a glass thing that glows |
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1st Oct 2022, 8:17 pm | #5 |
Heptode
Join Date: Jul 2020
Location: Larkhall, South Lanarkshire, Scotland.
Posts: 671
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Re: Project Gone Wrong
Thing is when i was soldering the module over the top of the HI=FI PCB i thought i should cover the PCB To prevent solder splashes, Then i thought nah it'll be fine
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Help!! I've been electrocuted by a glass thing that glows Last edited by Radio Scotland; 1st Oct 2022 at 8:26 pm. Reason: typo |