#Tag
Repair Day is tomorrow at Pedal Markt, Berlin. Come work on your broken music gear and DIY projects:
Repair Day is tomorrow at Pedal Markt, Berlin. Come work on your broken music gear and DIY projects:
#electronics beings of Fedi, can you please tell me how to #repair this switch in my electric kettle? it looks like it’s been exposed to a lot of water (hot water leaked into the electronics of the kettle) and it’s rusted. the problem is that it doesn’t complete the circuit when it’s in the “on” position. I want to either disassemble and clean the rust off of it or just buy a replacement switch
but, I can’t even disconnect it from its electrical connectors. they look like you can just pull them off, but I’ve been pulling fairly hard and they won’t budge
so my questions are:
#electronics beings of Fedi, can you please tell me how to #repair this switch in my electric kettle? it looks like it’s been exposed to a lot of water (hot water leaked into the electronics of the kettle) and it’s rusted. the problem is that it doesn’t complete the circuit when it’s in the “on” position. I want to either disassemble and clean the rust off of it or just buy a replacement switch
but, I can’t even disconnect it from its electrical connectors. they look like you can just pull them off, but I’ve been pulling fairly hard and they won’t budge
so my questions are:
I've got a new paper out on eprint: Monitoring tamper-sensing meshes using low-cost time-domain reflectometry.
In the paper, I wrote up how you can build a ~200 ps resolution time-domain reflectometer from an STM32 and some cheap display bus redriver ICs. The circuit is sensitive enough to distinguish several identical copies of the same test specimen PCB from manufacturing tolerances!
blog post: https://jaseg.de/blog/paper-sampling-mesh-monitor/
paper preprint: https://eprint.iacr.org/2025/1962
I've got a new paper out on eprint: Monitoring tamper-sensing meshes using low-cost time-domain reflectometry.
In the paper, I wrote up how you can build a ~200 ps resolution time-domain reflectometer from an STM32 and some cheap display bus redriver ICs. The circuit is sensitive enough to distinguish several identical copies of the same test specimen PCB from manufacturing tolerances!
blog post: https://jaseg.de/blog/paper-sampling-mesh-monitor/
paper preprint: https://eprint.iacr.org/2025/1962
I've got a new paper out on eprint: Monitoring tamper-sensing meshes using low-cost time-domain reflectometry.
In the paper, I wrote up how you can build a ~200 ps resolution time-domain reflectometer from an STM32 and some cheap display bus redriver ICs. The circuit is sensitive enough to distinguish several identical copies of the same test specimen PCB from manufacturing tolerances!
blog post: https://jaseg.de/blog/paper-sampling-mesh-monitor/
paper preprint: https://eprint.iacr.org/2025/1962
And hey, since the weather is absolutely abysmal today, I will treat you to another die shot as an extension of #nakeddiefriday.
This is КР1810ВМ86, an otherwise identical clone of Intel 8086 made by Soviets at an unknown plant.
The 8086 was extensively reverse-engineered by @kenshirriff -- give his blog a read!
SiPron page: https://siliconprawn.org/archive/doku.php?id=infosecdj:unknown:kr1810vm86
Ok I have a very specific #electronics question... I want to control a #telescope mount from an Raspberry through the ST4 interface. This interface is very simple, you just have to "short" one of the 4 lines to the common ground to send the signal to move in that direction. On my mount I've measured 3.3v. On the interwebs everyone does what I want to do with optocoupleurs, but I don't have those at hand. In my mind I can achieve the same thing using transistors. Am I going to break something?
Hi there! This is #nakeddiefriday again!
Today I'd like to present you one of frequent sources of pain for C64 owners, the infamous PLA. This is MOS 7700R2. They failed way too often, and considering this is custom silicon, the only option was to get another one of the same.
Many thanks to @root42 for providing this sample!
SiPron link: https://siliconprawn.org/archive/doku.php?id=infosecdj:mos:7700r2
Hi there! This is #nakeddiefriday again!
Today I'd like to present you one of frequent sources of pain for C64 owners, the infamous PLA. This is MOS 7700R2. They failed way too often, and considering this is custom silicon, the only option was to get another one of the same.
Many thanks to @root42 for providing this sample!
SiPron link: https://siliconprawn.org/archive/doku.php?id=infosecdj:mos:7700r2
Recently I've been working with analog magnetic sensors for reading keyboard position, velocity and aftertouch.
Wrote a quick FM-synthesis engine for some sweet 1980s synth bells. Then took the prototype keyboard for a test drive on one of them free jam-tracks. : }
Recently I've been working with analog magnetic sensors for reading keyboard position, velocity and aftertouch.
Wrote a quick FM-synthesis engine for some sweet 1980s synth bells. Then took the prototype keyboard for a test drive on one of them free jam-tracks. : }
This question might sound silly for a lot of people who work with #electronics every day… but the centre pin in these barrel plugs always is the positive contact, right?
Don't have the power supply for this OptiPlex 5050, I do have a fitting 65W USB-C PD adapter board though and want to use that instead. I'm just… decently scared of screwing up something since I can't test it with the original power adapter beforehand.
#diy #soldering
Being pretty much a beginner in PCB stuff, I can't tell whether this is good routing or absolutely horrible
But it should get the job done, right...? U1 is a MCP73831-2 charge IC
Happy #nakeddiefriday to everyone! Let's get this ball rolling.
Today we have a real classic, the MC6845 by Motorola. This is a CRT controller chip used in quite a few video adapters back in the day.
Thanks to @gloriouscow for suggesting this one! We'll do a short thread looking around.
SiPron page: https://siliconprawn.org/archive/doku.php?id=infosecdj:motorola:mc6845p-jr5
Happy #nakeddiefriday to everyone! Let's get this ball rolling.
Today we have a real classic, the MC6845 by Motorola. This is a CRT controller chip used in quite a few video adapters back in the day.
Thanks to @gloriouscow for suggesting this one! We'll do a short thread looking around.
SiPron page: https://siliconprawn.org/archive/doku.php?id=infosecdj:motorola:mc6845p-jr5
… waitaminute, did they just mirror the antenna on the back of the PCB, and then STAPLE THE TWO MIRRORS TOGETHER WITH VIAS ALONG THE ENTIRE PATH?!
If only the Fediverse had #electronics and #radio folks who could tell me that this isn’t entirely batshit insane
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