#silentSunday
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Gli ultimi otto messaggi ricevuti dalla Federazione
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Issa Rae has canceled her sold out performance at the Kennedy Center. Pulitzer Prize winner Rhiannon Giddens, Peter Wolf, Low Cut Connie, and the Gay Men’s Chorus of Washington, D.C., have also canceled. Lin-Manuel Miranda has canceled the entire Kennedy Center run of Hamilton.
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@nutjob4life 😀🫠
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Retro Semiconductors: The Silicon Controlled Rectifier
Over on YouTube [Lockdown Electronics] reviews an old bit of kit known as the Silicon Controlled Rectifier (SCR). Invented in the 1950s the SCR is a type of thyristor and they were popular back in the 1970s. They are often replaced these days by the TRIAC and the MOSFET but you might still find some old schematics that call for them and you can still buy them.
The SCR is a three terminal electronic switch which latches on. You apply a signal at the gate which allows the other two pins, the anode and cathode, to conduct; and they continue to do so until power is removed. The silicon inside the device is comprised of three semiconductor junctions, as: PNPN. The P on the left is the anode, the N on the right is the cathode, and the P in the right middle is the gate.
In the video [Lockdown Electronics] runs us through how to use them and compares them with a TRIAC. Unfortunately the lighting is a bit off for the demo of the SCR with AC power. To finish the video [Lockdown Electronics] wraps up with a windshield wiper control circuit from back in 1977 which is based around SCR technology. If you’d like to learn more about the SCR technology we have covered the basics.
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@kattekrab this is so cool!
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@quinta @paoloredaelli @77nn @Steutt @BucciaBuccia @informapirata poi, sia chiaro, sono certo che tutti operassero col migliore degli intenti, ma che si stesse creando una divergenza Italia Europa era ben chiaro fin dall’inizio. E la mancanza della federazione, ad esempio, era un altro dei dubbi che sollevammo…
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La guerra interna si intensifica. Sulle 32 denunce per il blocco del porto di Ravenna
@anarchia
In questi giorni la stampa ha dato notizia dell’arrivo di 32 denunce per un blocco stradale al porto di Ravenna quando, durante lo sciopero generale del 28 novembre indetto dai sindacati di base, un centinaio di persone ha bloccato per...Vedi
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@quinta @paoloredaelli @77nn @Steutt @BucciaBuccia @informapirata ricordo anche abbastanza bene la discussione avuta con le persone di agid in cui fu evidenziato lo sfriso di protocollo e la loro soluzione di implementare il mostruoso grateway saml to openid che ad esempio si vede quando si tenta di fare un login forte all’estero con SPID (ad esempio io ora vivo in Finlandia e se tento l’autenticazione italiana finisco sul proxy saml di agid)…
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@fluchtkapsel the answer depends a bit on what you are trying to achieve. Authenticate against a third party? Throw the password away and log in with a session cookie? Give access to third parties to data on the XMPP server?
We do the session tokens with FAST.
Prosody has some support for giving third parties access to (scoped) data on the XMPP server and clients (Conversations and Gajim) aren't involved here.
