ePanorama.net

All about electronics and circuit design

MISRA C coding standard

MISRA C is a set of software development guidelines for the C programming language developed by The MISRA Consortium. The aims of MISRA C aare to facilitate code safety, security, portability and reliability in the context of embedded systems, especifically those systems programmed in ISO C / C90 / C99. There is also a set

Friday Fun: Checking it twice

He’s making a table He’s checking it twice SELECT * FROM List WHERE behaviour = ‘Nice’ SQL clause is coming to town Source: https://m.facebook.com/groups/it.humor.and.memes/permalink/7115605828465140/ Related XKCD classic https://xkcd.com/838/

Phantom power in 3.5 mm jack!

Who decided it was a good idea to put 48V phantom power for microphone to 1/8″ / 3.5 mm jack? This is like asking intentionally for a disaster (fried mic or other device) to happen one day or next. This is this funny silly mixer/soundcard “M6 live sound card” sold in price range $15 up

Bad RCA cable

Unshielded RCA cable is bad design. The truth is that unshielded RCA cable is bad design and should be avoided. Unshielded unbalanced cables are very sensitive to capacitive coupling especially when circuit impedance is high (impedance mostly determined by signal source output impedance in HIFI systems). For example power cords radiate a magnetic field and

Bluetooth BLUFFS attacks

Almost all modern versions of bluetooth are hackable via BLUFFS attacks. CVE-2023-24023 Detail https://nvd.nist.gov/vuln/detail/CVE-2023-24023 Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4 allow certain man-in-the-middle attacks that force a short key length, and might lead to discovery of the encryption key and live injection, aka

Sauna stove fires

The Finnish sauna is a substantial part of Finnish culture. It was inscribed on the UNESCO Intangible Cultural Heritage Lists at the 17 December 2020 meeting of the UNESCO Intergovernmental Committee for the Safeguarding of the Intangible Cultural Heritage. The sauna in Finland is an old phenomenon and its roots are difficult to trace. Saunas

Teknologia 2023

I had most journalism work at Teknologia 2023. I spent last week two days at Teknologia 2023 and Cyber Security Nordic 2023 events in Helsinki Finland. Here are published material from the event: https://www.uusiteknologia.fi/2023/11/07/teknologia23-messut-aukesivat/ – I took picture https://www.uusiteknologia.fi/2023/11/08/teknologia23-suomessa-osataan-sirusuunnittelu-ja-piirituotanto/ – text and pictures https://www.uusiteknologia.fi/2023/11/08/suomalainen-iot-yritys-voitti-tietoturvapalkinnon/ – picture and text material https://www.uusiteknologia.fi/2023/11/10/teknologia23-tarjosi-passiivijaahdytysta-reunalaskentaan/ – text and pictures More

Embedded systems and IoT security technical article

I wrote a technical article on embedded systems and IoT security to Uusiteknologia.fi magazine: Designing modern electronics+ information security With the latest smart electronics and embedded microprocessors, devices connected to the network can be implemented even better, but even better care must be taken of their data security and protections. This Designing modern electronics article

TCP/IP is 50 years old

TCP/IP was born in this day 50 years ago when the editors of IEEE Transactions on Communications received a manuscript from Vint Cerf and Bob Kahn which described a method for sending packets across networks. Exactly which day Cerf and Kahn’s manuscript was received by the IEEE editors is not clear (it was either November