----- Original Message ----- From: "Jim Brain" <email@example.com> Sent: Wednesday, February 22, 2012 1:57 PM > On 2/16/2012 10:49 AM, Gerrit Heitsch wrote: >> >> D1 = 1N4148 > Why is D1 needed? In the reverse mode, the optocouple won't conduct, so > they're no concerns. -- Maximum reverse voltage of LEDs is generally very low, 6V in the case of 4Nxx optocouplers. -- >> C1 = 10 nF > I assume it's there to stretch the cycle. Given the 6.3V transformer > will have enough forward voltage for most of the half cycle, is the cap > really even needed? -- Just guessing, maybe to filter out line noise? mike Message was sent through the cbm-hackers mailing listReceived on 2012-02-22 20:00:12
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