5,915 reputation
1432
bio website embedinc.com/olin
location Littleton, Massachusetts
age 58
visits member for 2 years, 3 months
seen 23 hours ago

Electrical engineering consultant specializing in microcontrollers and the circuitry around them. Master of engineering in EE from Rensselaer Polytechnic Institute in 1980.

We are certified Microchip design partners, and have been in the top catagory consistantly since around 2000. Various free downloads related to developing PIC firmware and other things are available at http://www.embedinc.com/pic/dload.htm.


2d
comment Are there any sunglasses with prescription insert that does not alter depth sense?
Having perspective look a little off for a while until your brain adjusts is normal for any kind of corrective lenses. You should notice the same thing with your normal glasses. Do your normal glasses and the inserts have the same subscription? If not, that's the problem.
Jan
14
comment How to stay hydrated with minimum water usage
@David: You may not live or routinely hike in a desert but lots of people do. For many, it is the common case. Also, this is rebutting the OP's friend's blanket statement of 100 ml/h being enough, which supposedly covers all cases. It only takes a single example to prove it untrue. It is irresponsible for lots of cases, and borderline at best for the right circumstances.
Jan
14
comment How to stay hydrated with minimum water usage
@gerrit: I agree there are conditions, particularly rainy and cold but above freezing like you describe, where 1 l for a 10-hour hike is certainly possible. And, if you have regular access to water, then bringing a single 1 l bottle is fine. However, I certainly wouldn't recommend that for the general case, as the OP seems to be asking about.
Jan
14
answered How to stay hydrated with minimum water usage
Jan
13
awarded  Nice Answer
Jan
12
answered Does cotton really kill?
Jan
12
answered From an outdoor recreation point of view, does it matter who manages a national monument?
Jan
5
comment Where in the US can I find green mountains to hike like in Scotland, such as Dalveen Pass?
You say GB and UK are used interchaneably, which confuses me. Isn't the UK a sort of association of countries, like England, Scotland, and a few others? For example, isn't Northern Ireland part of the UK, but not on Great Britain? Doesn't UK also include a few Carribean islands, and used to include a lot more? So how do you refer to the geographic island that contains Scotland, England, and Wales, in contrast to the political entity that is the remnants of the once far-flung empire which today is largely, but not exclusively, found on the island of Great Britain?
Jan
5
comment Where in the US can I find green mountains to hike like in Scotland, such as Dalveen Pass?
Nits: You meant to say same latitude. UK is a country. The island you are referring to is Great Britain.
Jan
2
comment What are the different methods to purify water?
By the way, I wrote the firmware for the SteriPen Ultra. It has a display that counts down the seconds so you know how long to keep it sterilizing for. If I remember right, it takes 90 seconds to serilize 1 liter of water.
Jan
2
answered Where in the US can I find green mountains to hike like in Scotland, such as Dalveen Pass?
Jan
2
comment Where in the US can I find green mountains to hike like in Scotland, such as Dalveen Pass?
It would help if you showed a picture of the kind of landscape you want to hike in. No, I don't know Dalveen Pass, and I expect few others here do either. Also, which attributes exactly are the ones you care about. Openess, grass covered, the typical temperature, wetness, windiness, etc?
Dec
21
answered What is an effective way to join a map that is printed on several sheets?
Dec
21
comment Why are death percentages of death from trauma in an avalanche so different between USA, Europe, and Canada?
Europeans have thicker skulls?
Dec
21
comment How precise is a pedometer for estimating on a backpacking trip?
@mjr: No, a "pedometer" is something that tries to measure footfalls or steps. GPS units can measure traveled distance too, but it is wrong to call such devices "pedometers". You could use a measauring wheel to find trail length, but again, that's a measuring wheel, not a pedometer. In other words, pedometers are always step-based trackers, as you put it.
Dec
18
comment How precise is a pedometer for estimating on a backpacking trip?
Whether the GPS accumulates distance while you are standing still depends on how you have it set up. Normally you have it not create a new point until it thinks it's some minimum distance from the previous point, like 50 feet. Measuring a trail in 50 foot straight sections is still plenty accurate enough for most purposes, doesn't suffer from sitting still jitter, and doesn't accumulate ridiculously large GPS tracks.
Dec
15
revised What are some good guides to the U.S. national forests, specifically those in California?
added 837 characters in body
Dec
15
comment What are some good guides to the U.S. national forests, specifically those in California?
@Jason: They are next to each other, so I'd bump around and experience the variety myself. Like I said, one plan might be to start in Westwood and hike around north of there one day, go more north or east and hike around there the next day, etc. After a few days you'll end up in the NE corner of CA and will have experienced a wide range of different landscapes, but all relatively dry and open. Dig around Google Earth and look at uploaded photos.
Dec
15
answered What are some good guides to the U.S. national forests, specifically those in California?
Dec
15
comment What are some good guides to the U.S. national forests, specifically those in California?
"Lassen" is also a National Forest.