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Originally, I wanted to do a macro series of every Intel Pentium Processor chip that has been created, or perhaps more of a chronology of computer processing chips, but I was unable to obtain them in time for a class project I was doing this for. So, these are various parts to electronic devices such as remote controls, alarm clocks, computer keyboards, etc. I used a 60mm macro w/ an extension tube and primarily lit them from behind with a flash gun and filled in the front with on-cam flash.
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>>>>>>>>>> click the "ALL SIZES" magnifying glass to see a bigger pic <<<<<<<<<
PARTS
• 2 or 3 12-position rotary switches (or 10-position, whatever you can get)
• 2 pin or banana jacks (to match your test leads)
• resistor assortment from 5 ohms to 1M or greater; gold bands (5% tolerance) are better than silver bands (10% tolerance).
• project box
INSTRUCTIONS
1- Get a box and drill holes for mounting two or three 12-position rotary switches. Drill holes also for the two jacks.
2- Mount the switches and the jacks; label switch positions with corresponding resistor values.
3- Follow this diagram and solder resistors directly to the lugs of the rotary switches.
NOTE: If you solder the resistors so their unsoldered leads extend the opposite direction of the switch's shaft, these leads can be gathered together and soldered at once, connected to the bus wire terminating in point "A".
• The first switch would provide the lowest resistance, the next would provide mid-range resistors, and the final switch would be wired to the resistors with the greatest resistance.
• As seen, the 12th lug of the depicted switch connects to the next switch in the array. Naturally, the final switch in the array would have its 12th lug connected to the final resistor in the matrix.
PANEL
To mark the panel for the resistor values:
1- Turn the mounted switches to position "1" (doesn't matter at all how you orient the switches, just turn them to their lowest resistor settings).
2- Place knobs loosely on shafts and turn their pointers to wherever you want "1" (your lowest resistor value) to be located around the dial (near top or bottom of dial, usually).
3- Once all pointers are angled to this position, tighten their set screws to keep them in place.
4- With your marker, put dots where the pointers point as you click them all around their orbits.
5- Label these dots with the corresponding resistor values. Position "12" can be marked with an arrow pointing to the next switch.
USAGE
1- Set all rotary switches to "12" for starting position. This will provide the greatest resistance available (this is safest on the circuit). Plug your test leads in.
2- Begin turning the LAST dial downward and observe the response of the circuit (LED brightness, audio output, circuit clocking - whatever you're after).
3- When you get to position "1" on this switch, turn the next rotary switch to position "11" to continue the resistance decrease, and so on until you reach the resistance value desired.
4- Observe the resistance the dial is pointing to; grab another resistor of the same value, and your green LED will never again scare you with that ember-like, off-yellow, over-voltage, "Seeya in LED Halvala" glow.
Taken on macro mode, under natural and green light, and then monkeyed with in software. A selection of Amperex 7534, 6DJ8 / ECC88 and 12AX7, Telefunken and Amperex EL86 / 6CW5, and General Electric 6CX8. Most are OEM branded by Hewlett-Packard.
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The MightyBoard is the brains of the MakerBot Replicator 3D Printer.
These 5 swappable "BotSteps" control 5 stepper motors. The Blue connector is for attaching an interface board with buttons, lights, and SD card reader, and an LCD.
A close up of an old motherboard of mine taken with a 50mm prime and a reversing ring to get an extra magnified macro.
Closeup on the plastic guides (white part) that had to be removed. Just unscrew the screw, remove, rescrew the screw :-)
My very first attempt at using a soldering iron.
Luckily, my skills vastly improved in the next month after I did this.
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Product image of components from the Jennic range - www.sequoia.co.uk/components/manufacturer_list.php?m=12&a...
Jennic is a market leader in ZigBee, 6LoWPAN, IEEE802.15.4 wireless microcontrollers, modules and evaluation kits.
Tough only goes so far. Don't drop the machine with a USB cable plugged in! Hint: The jack's not supposed to be lifted off the board like that.
Testing a NaI(Tl) probe I got lying around for some time. Using documentation from the company that build these probes, Scionix, I was able to make a voltage divider and solder it to the tube socket. Later I will put it in a proper housing with BNC sockets and a mu metal shield against the Earths magnetic field, which can influence the performance of the probe by bending electrons in the photomultiplier.
Testing is done with a Cs-137 doped spark gap lying on the workbench.
I use my old Hameg 15 Mhz scope to view the pulses. It is fine for general electronics, but the steep pulses from the PMT are difficult for the scope to display properly. I need to get a better scope or just put a RC filter in line with the probe to lengthen the pulses.
Tuesday, April 30, 2013
HOW SUSTAINABILITY DRIVES INNOVATION
Efficiency is fine, but breakthroughs come when a drive to become more sustainable helps create new products or services. Old carpet becomes input for new. A consumer electronics giant uses its engineering know-how to move into electric-car batteries, solar power and the design of smart cities. And a disruptive home care company reinvents soap bottles and laundry detergent.
Panelists:
Vance Bell, Chairman and CEO, Shaw Industries, a Berkshire Hathaway Co.
Adam Lowry, Founder and Chief Greenskeeper, Method
Joe Taylor, Chairman and CEO, Panasonic Corporation of North America
Moderator: Natalie Allen, CNN International
Photograph by Stuart Isett/Fortune Brainstorm Green
My first Arduino circuit and Sketch! An ultrasound rangefinder on an Arduino Mega 2560 board. The ultrasound rangefinder is a cheapie couple of quid job from eBay - it's an SRF05
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www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1226290298
using direct port manipulation
about 0.36µs for:
while(1) {
PORTB |= 0x01;
PORTB &= ~0x01;
}
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