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| Electronic Schematics (alt.binaries.schematics.electronic) A place to show and share your electronics schematic drawings. |
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#1
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AC fan speed control by periodic on/off switching (from sed) - ONOFFTMR-Model.pdf
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#2
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AC fan speed control by periodic on/off switching (from sed) - ONOFFTMR-Model.pdf - ONOFFTMRA-Model.pdf
Oops... -- JF |
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#3
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AC fan speed control by periodic on/off switching (from sed) - ONOFFTMR-Model.pdf
On Sun, 13 May 2007 07:52:49 -0500, John Fields
wrote: Is U4B acting like a plain inverter, or does it have any schmitt behavior in that configuration? John |
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#4
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AC fan speed control by periodic on/off switching (from sed) - ONOFFTMR-Model.pdf
On Sun, 13 May 2007 10:45:42 -0700, John Larkin
wrote: On Sun, 13 May 2007 07:52:49 -0500, John Fields wrote: Is U4B acting like a plain inverter, or does it have any schmitt behavior in that configuration? Just a plain inverter. -- JF |
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#5
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AC fan speed control by periodic on/off switching (from sed) - ONOFFTMR-Model.pdf
In message , John Fields
writes [ A UUEncoded file (ONOFFTMR-Model.pdf) was included here. ] Out of interest, what does CR4 (in parallel with CR3) do? Ian. -- |
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#6
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AC fan speed control by periodic on/off switching (from sed) - ONOFFTMR-Model.pdf
On Mon, 14 May 2007 07:51:28 +0100, Ian Jackson
wrote: In message , John Fields writes [ A UUEncoded file (ONOFFTMR-Model.pdf) was included here. ] Out of interest, what does CR4 (in parallel with CR3) do? --- It keeps U4-10 from going more negative than a couple of hundred millivolts during the time the signal from T1 goes negative, saving wear and tear on the internal ESD diode going to ground at U4-10. -- JF |
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