LACED: Peeling Back PCB Layers With Chemical Etching and a Laser
Once a printed circuit board (PCB) has been assembled it’s rather hard to look inside of it, which can be problematic when you have e.g. a multilayer PCB of an (old) system that you really would like to dissect to take a look at the copper layers and other details that may be hidden inside, such as Easter eggs on inner layers. [Lorentio Brodeso]’s ‘LACED’ project offers one such method, using both chemical etching and a 5 Watt diode engraving laser to remove the soldermask, copper and FR4 fiberglass layers.
This project uses sodium hydroxide (NaOH) to dissolve the solder mask, followed by hydrogen chloride (HCl) and hydrogen peroxide (H2O2) to dissolve the copper in each layer. The engraving laser is used for the removing of the FR4 material. Despite the ‘LACED’ acronym standing for Laser-Controlled Etching and Delayering, the chemical method(s) and laser steps are performed independently from each other.
This makes it in a way a variation on the more traditional CNC-based method, as demonstrated by [mikeselectricstuff] (as shown in the top image) back in 2016, alongside the detailed setup video of how a multi-layer PCB was peeled back with enough resolution to make out each successive copper and fiberglass layer.
The term ‘laser-assisted etching’ is generally used for e.g. glass etching with HF or KOH in combination with a femtosecond laser to realize high-resolution optical features, ‘selective laser etching’ where the etchant is assisted by the laser-affected material, or the related laser-induced etching of hard & brittle materials. Beyond these there is a whole world of laser-induced or laser-activated etching or functionalized methods, all of which require that the chemical- and laser-based steps are used in unison.
Aside from this, the use of chemicals to etch away soldermask and copper does of course leave one with a similar messy clean-up as when etching new PCBs, but it can provide more control due to the selective etching, as a CNC’s carbide bit will just as happily chew through FR4 as copper. When reverse-engineering a PCB you will have to pick whatever method works best for you.
Top image: Exposed inner copper on multilayer PCB. (Credit: mikeselectricstuff, YouTube)
Baby Is Healed with First Personalized Gene-Editing Treatment
Link: nytimes.com/2025/05/15/health/…
Discussion: news.ycombinator.com/item?id=4…
Il ministro delle Imprese #Urso "normalizza" la piaga degli incidenti sul lavoro parlando dell'acciaieria #Ilva di #Taranto, dove negli ultimi vent'anni sono morti, in svariate circostanze, dodici operai: “L’incidente nell’altoforno? Spesso può capitare”.
ilfattoquotidiano.it/2025/05/1…
#Lavoro #SicurezzaSulLavoro #GovernoMeloni
Ilva, l’idea di Urso sulla sicurezza sul lavoro: “L’incidente nell’altoforno? Spesso…
Il ministro delle Imprese "normalizza" la piaga degli incidenti sul lavoro parlando dell'acciaieria, dove negli ultimi vent'anni sono morti, in svariate circostanze, dodici operaiAndrea Tundo (Il Fatto Quotidiano)
Chainlink Labs is hiring Technical Programme Manager, Security
🔧 #swift #blockchain #cryptocurrency #defi #web3 #securityengineer
🌎 Remote; San Francisco, California
⏰ Full-time
🏢 Chainlink Labs
Job details jobsfordevelopers.com/jobs/tec…
#jobalert #jobsearch #hiring
Christian Dior Couture Client Data Breached in Cyber Attack
https://www.bloomberg.com/news/articles/2025-05-15/christian-dior-couture-client-data-breached-in-cyber-attack?utm_source=flipboard&utm_medium=activitypub
Posted into Profiles @profiles-bloomberg
DOOM: The Dark Ages ya disponible: un antes y un después en el mundo de los FPS
fenixbms.es/doom-the-dark-ages…
DOOM: The Dark Ages ya disponible: un antes y un después en el mundo de los FPS
El universo de DOOM da un giro audaz y colosal con el esperado lanzamiento de DOOM: The Dark Ages, la nueva entrega desarrollada por id Software que promete redefinir la saga con una brutalidad ren…El Multiverso de FeniXBMS
Peru Economy Expanded 4.7% in March, Fastest Pace This Year
https://www.bloomberg.com/news/articles/2025-05-15/peru-economy-expanded-4-7-in-march-fastest-pace-this-year?utm_source=flipboard&utm_medium=activitypub
Posted into Emerging Markets @emerging-markets-bloomberg
Das Bild zeigt einen schwarzen Labrador Retriever, der in Profilansicht dargestellt ist. Der Hund trägt eine braune Halsriemenhalterung und eine blaue Halskette mit einem weißen Gerät, das an der Kette befestigt ist. Der Labrador hat ein glattes, glänzendes Fell und steht aufrecht mit einem ruhigen und aufmerksamen Ausdruck. Der Hintergrund ist weiß, was den Fokus auf den Hund lenkt.
Bereitgestellt von @altbot, privat und lokal generiert mit Ovis2-8B
🌱 Energieverbrauch: 0.160 Wh
Life in Ukraine's Occupied Territories. With Petro Andryuschenko
by @DarthPutinKGB
58:54
youtube.com/watch?v=HQgv4zP8c0…
🇺🇦
Interview with Petr #Andryuschenko, an adviser to the Mayor of #Mariupol: how it is life in the occupied territories of Ukraine and how Russia erases Ukrainian identity as a part of their occupation strategy.
🌻
The official youtube channel of #DarthPutin KGB and Katie Shmatsina with focus on russia and #putin's regime
#Ukraine
#Ukrainerussiawar
#NAFO
- YouTube
Profitez des vidéos et de la musique que vous aimez, mettez en ligne des contenus originaux, et partagez-les avec vos amis, vos proches et le monde entier.www.youtube.com
CBP Seizes Shipment of T-Shirts Featuring Swarm of Bees Attacking a Cop
The shirts will be returned to China or will be “destroyed under CBP supervision."Jason Koebler (404 Media)
On #Nakba77, Palestine Action are using a recreated Palestinian ambulance to shut down Israel's biggest weapons producer.The Nakba began when Zionist militia, armed by the British, ethnically cleansed Palestinians from their homeland.
We won't stop until the Nakba does.
Source: @Pal_action on x/twitter
like this
My world in 1 photo
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#betergejatdanslechtbedacht #art #artvisual #photooftheday #streetphotography #visuals #artoflight #myworldinonephoto #interesting #youbringonthesun #youmakeitshine #leeuwarden #photography #gabekamphuis #visualstoryteller #photovisionary
Unhappy with the recently lost file upload feature in the Nextcloud app for Android? So are we. Let us explain. - Nextcloud
cross-posted from: feddit.org/post/12435851
Unhappy with the recently lost file upload feature in the Nextcloud app for Android? So are we. Let us explain. - Nextcloud
Unhappy with the recently lost file upload feature in the Nextcloud app for Android? So are we. Let us explain. - Nextcloud
Discover why Nextcloud file uploads for Android app are not working properly, and how Google’s app store rules are hurting Nextcloud users.Christoph Weissthaner (Nextcloud)
CBP Seizes Shipment of T-Shirts Featuring Swarm of Bees Attacking a Cop
🔗 404media.co/cbp-seizes-shipmen…
CBP Seizes Shipment of T-Shirts Featuring Swarm of Bees Attacking a Cop
The shirts will be returned to China or will be “destroyed under CBP supervision."Jason Koebler (404 Media)
Sidi Wacho ft Djam & TiMoh - El Harba
El Harba feat Djam et TiMoh
El Harba (Lyrics)
Hawzouni mel dar
Wel nass tchouf
Farkouni ana 3la waldia
Burlando la aduana
Espalda mojada
Burlando la aduana
Camino a Tijuana
Alger, Marseille, Barbes, Roubaix
Le trajet, tu connais
Faites rentrer l'accusé
Douaniers armés, jungle Calais
Indignité!
Ils t'ont donné la nauseé
Ils ont fouillé les bagages, DZ dans l'equipage
Musique de sauvage, pirates sur rivage
Panique genérale, Marion Marechal
Culture coloniale, préférence nationale
Carré VIP, sans bracelet, sans ticket
Parasiter, sans hésiter
Shoote shoote le sheriff, l'heritier
Frèro chui traqué, y'a l'algo qui m'a cramé
Habibi Sudaka c'est floqué sur le mallot
Manif, pogo, j'bosse le cardio
Madjer, Belloumi, Zamorano
Seleção, clandestino
Hawzouni men dari
Wel nass tchouf
Khabri elhag elmarssilia
Ferkouni ana ala waldia
Zadou dawli ederiya
Burlando la aduana
Espalda mojada
Burlando la aduana
Camino a Tijuana
Si tu habibi y yo Sudaka
Si nos juntamos a mover las patas
Tu te desatas te desacatas
Yo desde el sur te traje una sonata
La policía de piñata, maldita rata
Politiquero truquero te aprieta la corbata
Lleno de garrapatas tu cara te delata
Con mis ñeros en el ghetto
Bailando al ritmo de la caja vallenata
Y así se mueven los maleantes
Trabajador, vendedor ambulante
Así se mueven los maleantes
Lo baila el obrero, baila el estudiante
Como es
No bajare la mirada
Vengo de lejos y no le temo a nada
No bajare la mirada
Vengo de lejos y no le temo a nada
Hawzouni men dari
Wel nass tchouf
Khabri elhag elmarssilia
Ferkouni ana ala waldia
Zadou dawli ederiya
Burlando la aduana
Espalda mojada
Burlando la aduana
Camino a Tijuana
Elharba kheir li
Elgorba mahi lia
Elheda kheir li
Elharba kheir li
Le matin chui cerné, le sommeil agité,
Le réveille ulceré, les radeaux échoués
J'essaye d'eviter les fachos dans le JT
J'revise, mes couplets, mes refrains mes phrasés
La fosse, la piste j'viens faire trembler
Ma foule, ma meute va déferler
L'heure de nous même va sonner résonner
Quartiers huppés j'viens effrayer
Hawzouni men dari
wel nass tchouf
Khabri elhag elmarssilia
Ferkouni ana ala waldia
Zadou dawni bel nia
Burlando la aduana
Espalda mojada
Burlando la aduana
Camino a Tijuana
Sinner fa a pezzi Ruud in poco più di sessanta minuti: 6-0 – 6-1
Voilà. Tolto il dente Ruud. E' stato uno schiacciasassi quello che ha investito il norvegese. Un Sinner dalla partita perfetta: sessanta minuti di gioco e un punteggio che non lascia spazio a discussioni. Sinner batte il norvegese Ruud con il punteggio di 6-0 - 6-1 in un match che domina dal primo all'ultimo colpo. Si aspetta la semifinale. (15 maggio 2025)
sport.gaiaitalia.com/copertina…
Sinner fa a pezzi Ruud in poco più di sessanta minuti: 6-0 – 6-1
Voilà. Tolto il dente Ruud. E’ stato uno schiacciasassi quello che ha investito il norvegese. Un Sinner dalla partita perfetta: sessanta minuti di gioco e un punteggio che non lascia spazio a…Gaiaitaliapuntosport
"When launching privacy-critical apps and services, developers want to make sure that every packet really only goes through Tor. One mistyped proxy setting–or a single system-call outside the SOCKS wrapper–and your data is suddenly on the line.
That's why today, we are excited to introduce oniux: a small command-line utility providing Tor network isolation for third-party applications using Linux namespaces. Built on Arti, and onionmasq, oniux drop-ships any Linux program into its own network namespace to route it through Tor and strips away the potential for data leaks. If your work, activism, or research demands rock-solid traffic isolation, oniux delivers it."
blog.torproject.org/introducin…
#Tor #CyberSecurity #Linux #Privacy #Anonymity #Oniux
Introducing oniux: Kernel-level Tor isolation for any Linux app | Tor Project
Introducing oniux: Kernel-level Tor isolation for any Linux app. This torsocks alternative uses namespaces to isolate Linux applications over the Tor network and eliminate data leaks.blog.torproject.org
Dichos, sonrisas, y tú...: El mensaje
La elección de un buen mensaje es fundamental para la estrategia de comunicación efectiva. #SEO #SocialMedia
#cuento #relato #sonrisa #motivación
dichossonrisasytu.blogspot.com…
El mensaje
La elección de un buen mensaje es fundamental para la estrategia de comunicación efectiva.dichossonrisasytu.blogspot.com
"Frans Corstens, gepensioneerd hoogleraar nucleaire geneeskunde, is wel het gebouw uit gegaan. Hij sprak de actievoerders afkeurend toe. "Wat er in Gaza gebeurt, geeft jullie geen enkel recht om deze bijeenkomst zo te verstoren”, zegt Corstens. Hij roept de betogers op om maar in Israël te protesteren. "Want daar gebeurt het, niet hier."
🤦♂️ 🤦♀️ 🤦 🤦♂️ 🤦♀️ 🤦 🤦♂️ 🤦♀️ 🤦
gelderlander.nl/nijmegen/vieri…
archive.ph/32uQX#selection-182…
#RadboudUniversiteit #Studentprotest #CutTheTies #Israel #Gaza #genocide
Tony Kanaan gets back on track at Indianapolis, perhaps for the final time in storied career
https://apnews.com/article/indy-500-kanaan-larson-4f8356ca8d3895289141863dc03d0799?utm_source=flipboard&utm_medium=activitypub
Posted into Sports @sports-AssociatedPress
ZZ Bottom reshared this.
Barclays’ DCM Chief Sees Buyers Longing for Long Bonds
https://www.bloomberg.com/news/audio/2025-05-15/barclays-dcm-chief-sees-buyers-longing-for-long-bonds-podcast?utm_source=flipboard&utm_medium=activitypub
Posted into Podcasts @podcasts-bloomberg
📰 Lala Kent moet operatie aan oog ondergaan
🕙 21:50 | RTL Nieuws
🔸 #Kanker #USA #Operatie #Arts #Instagram
Lala Kent moet operatie aan oog ondergaan
Een arts heeft een afwijking gevonden in het oog van Lala Kent. De Amerikaanse mediapersoonlijkheid deelt via Instagram dat het "mogelijk om een voorstadium van kanker" gaat.RTL Boulevard
On Mastodon, if you've clicked a "Follow" button and it turns into "Pending" or "Cancel Follow" or "Request Sent", it means the follow hasn't actually happened yet.
Usually it's because the account has follow requests switched on, so you just wait for them to approve your request.
However, sometimes it's due to other reasons, and you may have to do something special to get the follow to work. Lots of info and full instructions at:
➡️ fedi.tips/why-does-it-say-foll…
Why does it say “Cancel Follow” or “Pending” or “Follow Request Sent” when I try to follow an account? | Fedi.Tips – An Unofficial Guide to Mastodon and the Fediverse
An unofficial guide to using Mastodon and the Fediversefedi.tips
Welcome “rsxie” to SDF Remote Vintage Systems! Thanks to decromancer’s QBone adapter we can do just about anything with this tiny LSI PDP-11/03
#vintagecomputing #retrocomputing #retrogaming #museum
AXA Investment Managers' Bigos on Market Sentiment
https://www.bloomberg.com/news/videos/2025-05-15/axa-investment-managers-bigos-on-market-sentiment-video?utm_source=flipboard&utm_medium=activitypub
Posted into Bloomberg Television @bloomberg-television-bloomberg
Meta to Delay Rollout of AI Model ‘Behemoth’: WSJ
https://www.bloomberg.com/news/videos/2025-05-15/meta-to-delay-rollout-of-ai-model-behemoth-wsj-video?utm_source=flipboard&utm_medium=activitypub
Posted into Bloomberg Television @bloomberg-television-bloomberg
VocalSynth 2 plugin by iZotope on sale for $29 USD rekkerd.org/izotope-vocalsynth…
#iZotope #PluginBoutique #Sale #Synthesizer #vocals #vocoder
VocalSynth 2 plugin by iZotope on sale for $29 USD
Plugin Boutique has launched a sale on iZotope's VocalSynth 2, offering a 90% discount on the plugin that is designed to help craft your own signature vocal sound.Ronnie (Rekkerd.org)
‘Anima e colore’, in San Cristoforo espongono Francesco Andreozzi e Maurizia Cardoni
Il pittore, classe 1963, ama una pittura tra l’informale ed il figurativo: "Cerco l'originalità". Domani un concerto d'organo
Check out my friend's art book, Enshittification by Thad Higa. Flipping the pages takes you on a journey through online hell.
youtube.com/watch?v=Zf4VaitvcO…
Hat tip to @pluralistic
Thad's website here: thadhiga.com/
#Art #PrintMaking #SmallPress #ArtBook #Books
𐌐𐌀Ꝋ𐌋Ꝋ
in reply to 𐌐𐌀Ꝋ𐌋Ꝋ • • •Lontano anni luce dal mondo del lavoro, dalle lavoratrici e dai lavoratori messi completamente da parte in nome del guadagno facile e del profitto.
Un motivo in più per recarci alle urne il prossimo 8 giugno e votare Si.
Cinque Si per i diritti di tutti i lavoratori. E che il risultato di questo Referendum possa essere un grande, enorme, schiaffo per questo governo di inetti.