Security researcher wonk, community-based geekery, rockin' IoT, fan of things that fly more than once.
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Joined September 2009
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📣 New Podcast! "Why Asia-Pacific matters in cybersecurity - AVAR edition" on @Spreaker spreaker.com/episode/why-asi…
Your regular browser may not be secure enough for modern threats, enterprise browsers can help. secureiqlab.com/enterprise-b…
📣 New Podcast! "Blackhat - AI won't solve everything (but it might help some)" on @Spreaker spreaker.com/episode/blackha…
Local guy running for School Board can't spell school on the application, even after deleting the second 'L' :)
Good simple explanation of the foundation of power supplies and rectifiers.
Diode Rectifier Circuits Infographic
I've updated this infographic a bit. In it I've shown the common types of diode rectifier circuits that are used within linear power supplies and many other circuits, and the output waveforms are shown.
There are several different rectifier circuits that are in common use and each has its own properties, characteristics and capabilities.
Some are applicable to some situations, whereas other circuits to different situations.
To select the best circuit for the particular circuit and situation, it helps to have a quick summary of the various common rectifier circuit configurations:
- No rectifier: For this circuit, the output from the transformer is applied directly to the load which sees a full wave alternating voltage.
- Half wave rectifier: This is the simplest rectifier circuit and it uses a single diode to provide half wave rectification. Half the waveform is passed through the diode leaving the remaining half blocked. The peak of the waveform of 1.414 times the RMS value of the transformer output less a single diode drop.
- Full wave rectifier using a centre tapped transformer: This circuit uses two diodes to provide full wave rectification utilising both halves of the waveform. The peak voltage output is 1.414 times the RMS voltage from the transformer less a single diode drop. The disadvantage is that this requires a more expensive transformer and each half of the winding is only used for half the cycle.
- Full wave rectifier using bridge rectifier: This circuit uses a transformer with a single winding and no centre tap on the output to provide full wave rectification. The peak output voltage is 1.1414 times the RMS voltage of the transformer output less two diode drops.
- Full wave bridge rectifier with smoothing: This circuit uses a full wave bridge rectifier with a capacitor to provide smoothing. Some ripple remains as can be seen, but it is much better than if a half wave rectifier had been used. A voltage regulator may be used to provide a fully regulated output.
I havent shown the full wave rectifier with a pi circuit including an inductor as these are less widely used now.
Crypto Sec retweeted
.@nytimes sues @OpenAI and @Microsoft for copyright infringement
— This is a big deal because it could set a precedent for 1. How courts define the value of news content in training large language models and 2. What the damages are for previous use
@axios
axios.com/2023/12/27/nyt-mic…
nice iPhone exploits, 4 of them in a cozy exploit chain arstechnica.com/security/202… @dangoodin001
computer?
wait, you want to be able to work on things you own and paid for <gasp>
Crypto Sec retweeted
As the #OnlineSafetyAct becomes law in the #UK without critical legal safeguards to end-to-end encryption, the internet as we know it faces a very real threat: proton.me/blog/online-safety…
The Act could give the UK government the power to access, collect, and read anyone’s private conversations at any time. The UK Government has previously admitted that the proposals are "technically unfeasible," and we hope @Ofcom keeps this front of mind during the implementation process.
European lawmakers also need to acknowledge this when considering similar legislation in the EU. It's not too late to stop #chatcontrol, and we encourage all of our EU-based users to contact their MEPs about this.
Proton will not comply with any measures to weaken encryption for our UK users. While no one objects to increased online safety, we believe that it shouldn't come at the expense of the fundamental right to privacy. We don't believe that the majority of Proton's services will fall under the scope of the OSA; however, should we receive any requests under the Act to alter our encryption, we will be prepared to fight through legal means.
I'm still on numbers and counting, at least there's a future for me in spreadsheets :)
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Going to speak at Virus Bulletin about dirt cheap corporate backdoors people aren't really thinking about: e-waste with your whole routing environment still on them.
Enjoyed the talk, very informative, glad you're looking to emulate more architectures. @BSidesLV
