I did earlier a teardown of broken Behringer B208D active PA speaker. Now it was time to get ot fixed. The problem was that sound level before distortion was very low and bass was missing. It seems that low frequency driver could output only 1-2V signal to speaker before distortion, and to get that the →
I wrote around two years ago a blog posting on RJ-45 Ethernet surge protection. Now it is time to check out what is inside one cheap Ethernet surge protector. The product here is very cheap (around $2) CY UT-013 Lightning Protection RJ45 UTP STP CAT6 CAT5e Female to Female Network Lan Adapter Extender. The specifications →
https://blog.hackster.io/picking-the-right-arduino-341a0a9550c7 Arduino started with just few boards, but now ten years later, there is an Arduino board type for (practically) every application or project. The choice can be overwhelming when selecting. This article gives overview if what to consider and what is available. Many of the latest boards are aimed fot IoT applications. →
This posting is here to collect security alert news in September 2018. I post links to security vulnerability news to comments of this article. You are also free to post related links. →
https://www.theonion.com/china-unable-to-recruit-hackers-fast-enough-to-keep-up-1819578374 This is a parody article but it seems that it might not very far from reality in many details… →
Hacker and security researcher Samy Kamkar takes a look at a variety of hacking scenes from popular media and examines their authenticity. →
https://www.reaktor.com/blog/reaktor-space-lab-takes-off/ At 6.28 a.m. Helsinki time today, Reaktor Space Lab launched Finland’s first commercially-built nanosatellite into space. The team had some the people who had launched Finland’s first two satellites: Aalto 1 and Aalto 2. There is also another Finnish satellite being launched hopefully in few days: http://suomi100satelliitti.fi/laukaisu_aikaisintaan_2_joulukuuta →
https://predictabledesigns.com/wireless_technologies_bluetooth_wifi_zigbee_gsm_lte_lora_nb-iot_lte-m/ Deciding what type of wireless technology your new product should use can be an overwhelming task. This article has organized the various wireless technologies into a groups based on functionality, data speed, and operating range. This is a long, very detailed article. →
https://www.iflscience.com/space/nasas-insight-probe-has-successfully-touched-down-on-the-surface-of-mars/ NASA has confirmed that its InSight spacecraft has safely touched down on Mars, the first successful landing on the Red Planet in more than six years. Check also posting on older Mars probe at http://www.epanorama.net/newepa/2012/08/24/mars-rover/ →
I have understood that hooking up an old telephone handset to work with a cell phone is simply a matter of connecting together the correct wires. You need to wire the microphone and speaker in the old telephone’s handset to the microphone and speaker in the cell phone’s headset connector. I decided to try that →