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An electronics puzzle...	by MrTrick	2006-11-19 12:55:59
Based on a quick Ohms Law calculation	by radiowave911	2005-12-19 18:48:51
I'd say 10200. With just the 2 1M resistors, you will have 2.5uA flowing at 5V. 25.5mV @ 2.5uA is 10.2K of resistance. Add this in to the original picture, you get 2010200 ohms of resistance, which changes the current at full scale to 2.49uA, making the drop across the 10.2K resistor 25.4mV for a 5V input. Of course, the PWM output will not be a steady state output (hence the name PWM). It will only switch between a logic low and a logic high with pulse widths determined by the PWM value. You may need additional components to convert the pulse output into a varying voltage.
[ Reply ]
Yup...	by MrTrick	2005-12-19 18:55:11
You could always try a multi-turn trimmer	by radiowave911	2005-12-19 19:05:35
Yeah, so I'll be safe.	by MrTrick	2005-12-19 19:13:33
Something you may run into is a	by radiowave911	2005-12-19 19:22:11
It'd better not!	by MrTrick	2005-12-19 20:06:20

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