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To know when an object is in free fall, the acceleration is 0. Thus it is easy to measure, so long as you know what is up. I have used a 3-axis accelerometer without any issues. Quite easy. Look at

The 555 timer was originally designed in 1970, and since then a CMOS version has come out, along with versions from other makers designed to run at higher speeds, lower voltages, and lower power.

A good lesson here is that a reference schematic is not the same as a reference board layout. In many cases, part placement is as important as part value. Thanks for the report on the solution,

And I was at SEA-TAC just last Thursday :( Not that I know what I'd do with them. Donald. -- *Plain Text* email -- it's an accessibility issue () no proprietary attachments; no html mail /\ ascii

An accelerometer measures acceleration, which is the first derivative of velocity with respect to time. Theoretically, you can integrate acceleration over time to obtain velocity, but the problem is

Hello All, I have been doing some reading, re using an accelerometer to measure velocity. I want to detect when an object is travelling too fast. It is an up/down or vertical movement, and maximum

I'll take the lot - as soon as you arrive here in New Zealand. Daryl

"liquid residue under the 400 V capacitor" I am not refering to the silicone goop used to hold some components. Can you get a schematic for "the brick"? Times are changing - we called WWII German

What part are you confused about on the GoldPhoenix website? http://goldphoenixpcb.biz/special_price.php <http://goldphoenixpcb.biz/special_price.php>Their offer is much simpler then the website may

FYI The http://dorkbotpdx.org/wiki/pcb_order confirmed my order today for total price less than $5 for all six .8x.7 adapter boards. I am satisfied with that. I'll post some comments after I get them.

Yeah but .... if you believe Oprah, Australia is the place to be; in particular Melbourne where I am. Cheers, Ross

Would it be a big problem for you to move to Northern CA...then I'll pick them up. :-) How come the great deals are always someplace I'm not. James "Jim" M. Geidl, K6JMG No trees were harmed in the

Neat! I love it. I hope it is worth something just because it is so darn neat. Steve Greenfield AE7HD

I have a big box full of IR LEDs and photodiodes. All samples, just a few of each. Free if you pick up. I'm in Tacoma, WA, USA. ?Steve Greenfield AE7HD http://www.linkedin.com/in/stevenjgreenfield

With the interest in ARM processors maybe I should just mention: http://www.riscosopen.org/content/ RISC OS is a full blown, mature, operating system running on ARM processors. Indeed, it is /the

I purchased a piece of ELECTRONIC test equipment at a sale recently, and would like to know if it has any value. "<http://groups.yahoo.com/group/Electronics_101/photos/album/1920106475/pic/list>" are

Thank you. I'll take my own pleasure, for the recognition by a kindred spirit in arms. Now why doesn't this !@#$%#$ work? Reese

When I used to work with hundreds of Wyse 50 monitors, the most common failure(s) were multiple capacitor failures on the CRT driver. I had bought a capacitor tester (LRC) which proved very good at

I have wonderful news! You qualify as an 'Electronic Pack Rat'. Congratulations!!! Regretfully, there is no plaque, trophy, or certificate awarded for this prestigious award. Charles AE5EW

I'll take that as a qualified and vetted answer. I guess my next step is disassembly, followed by identification, acquisition, and installation. I may be able to make the brick work again, for other