What is replacement for the IRFH5306 that's not surface mount?
LED fade in/fade out
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2nd April 2012 09:53 PM #21ljcox
Thanks alec_t, that seems to be the point he is missing.
Originally Posted by alec_t
0Len
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7th April 2012 02:33 PM Thread Starter #221-3-2-4
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7th April 2012 02:52 PM #23alec_t
Google for n-channel mosfets.
I'm not recommending any particular manufacturer, but here's a page selected at random
http://www.vishay.com/mosfets/n-channel/to-220-package/
Just pick one with Vds at least 30V and Rdson less than ~ 0.05.0Last edited by alec_t; 7th April 2012 at 03:16 PM.
My circuit designs should be regarded as experimental. Although they work in simulation, their component values may need altering or additional components may occasionally be necessary when the circuit is built. Due safety precautions should be taken with any circuit involving mains voltage or electrostatic-sensitive components.
Alec's First Law:-
Every problem has a solution (given the right information and resources).
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7th April 2012 03:17 PM Thread Starter #241-3-2-4
Originally Posted by alec_t
If i searched right I don't think digikey has any with this rating Mouser has it but digikey arrives a little faster and with the recent storm that hit TX might slow it down some.0
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8th April 2012 01:44 AM #25Mosaic
If i were to try this I'd use an LM317 or 338 with a voltage divider and an RC component on the reference leg of the regulator. So basically you'd get a slow ramp up and down on the voltage which will translate into brightening and dimming of the LEDs via a dropping resistor. No other IC's or transistor drives needed. You will need a DC supply of about 1.5V over the target max voltage though.
I've used a PWM technique into an RC filter on such a regulator b4 to create control of a linear voltage for batt. charging.0
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13th April 2012 06:27 AM Thread Starter #261-3-2-4
That would mean I would need to change my power supply however.
one question can I do without the mosfet?0
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13th April 2012 03:56 PM Thread Starter #271-3-2-4
I feel stupid for asking this but C2 is that 0.1uF?
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13th April 2012 04:14 PM #28audioguru
Which schematic? Originally Posted by 1-3-2-4
100nF is 0.1uF. A "Western" 0.1uF film capacitor is marked "100n". An Asian 0.1uF film capacitor is marked "104".0Uncle $crooge
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13th April 2012 04:23 PM Thread Starter #291-3-2-4
post #11 Originally Posted by audioguru
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Last edited by 1-3-2-4; 13th April 2012 at 04:23 PM.
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14th April 2012 10:38 AM Thread Starter #301-3-2-4
going to use the IRF510 for the mosfet but I was going over the design and with those bjt's it would lower the gate voltage on the mosfet too much so I was going to omit them in the circuit.
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