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Post by Deleted on Nov 26, 2005 5:58:42 GMT -8
LED Flasher with Slow Rise and Fall Timer www3.telus.net/chemelec/Projects/Flasher/Flasher.htmI am very new to this and would like to try this circuit. I seem to under stand most of the schematic but I am a little confused about what is going on between pin 6 and 7 on the 555 chip. The arrow and what looks like 10k resistor is really for the 10k potentiometer? The 4k7 for 4.7k is that also part of the potentiometer or is that a resistor? With this asked could you in simple terms tell me how to hook up the potentiometer between pin 6 and 7? I am so new to this I might have been born yesterday. Thank you for any help in advance,
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Post by Deleted on Nov 30, 2005 6:21:10 GMT -8
Hi Chris:
The 4K7 resistor is not part of the potmeter, it is connected in between the walker (center tab) of the potmeter and pin 6/2 of the 555 and the 1N4148 diodes.
To hook up the potentiometer, (see above) solder one of the other tabs to pin 7 of the 555 and leave the other tab 'not connected'.
I will build Gary's circuit myself for an application i have.
Let me know if you need more help. -Opa
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Post by Deleted on Dec 18, 2005 12:51:27 GMT -8
I constructed this circuit and it worked. Thank you Opa for your help. Thank you Gary for posting it on the web. I was wondering if there was any way in slowing down the rise and fall of this circuit? I slowed down the blinking with a bigger capacitor. But the rise and fall seem to stay the same rather I speed it up or slow it down. Any hints tricks or ideas on this will be appreciated thanks ;D
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Post by Gary Lecomte on Dec 19, 2005 7:19:13 GMT -8
Sorry No, I haven't tried to do that. And not sure if its possible.
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