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W h I t E b O a R d
Friday, September 9, 2011
Tuesday, May 3, 2011
CashFlow
Many investors focus on cash flow from operations instead of net income because there's less room for management to manipulate, or accounting rules to distort, cash flow.
If net income is much larger than cash flow from operations, it's a signal that the company's earnings quality-the usefulness of earnings-is questionable.
If cash flow from operations exceeds net income, on the other hand, the company may be much healthier than its net income suggests.
Therefore to value a stock we will use the price/cash-flow ratio.
The share price divided by cash flow from operations per share-instead of the P/E ratio.
If net income is much larger than cash flow from operations, it's a signal that the company's earnings quality-the usefulness of earnings-is questionable.
If cash flow from operations exceeds net income, on the other hand, the company may be much healthier than its net income suggests.
Therefore to value a stock we will use the price/cash-flow ratio.
The share price divided by cash flow from operations per share-instead of the P/E ratio.
Friday, February 18, 2011
Infrared PEn
Infrared Pen
What do I need to build an infrared pen?
Basically just an old thick pen, an infrared LED, a small switch and a battery. But here you have the components I used for my infrared pen. I used some more extra components, because they make it easier to assemble everything.
Components:
* Infrared LED (wavelength: 850-880 nm, diameter: 5mm)
* LED Holder
* Puch Switch
* Coin Batteries (1,5V depends on your LED)
* Coin Battery Holder
* Marker (as thick as possible)
* Cables
Normally you would need a resistor because of the LED. But I didnt use one and the LED works over a year now, so I think its ok without.
How to build an infrared pen?
When you have all the components, you have to put them into your marker!
Therefore first split you marker vertically in two parts, you can saw or cut it for example. So that you can put everything inside it. But first empty it.
After that make a hole for your switch, so that it exactly fits. Make two more small holes for the Coin Battery Holder connections. So that you can solder some cables at the holder in the marker. You can also make a small hole into the holder to screw the it onto the marker.
Take your LED and put it in the LED holder. You can fix it with glue in the tip of the marker.
Now you can solder everything. Solder the Anode (plus) of the Coin Battery Holder in the marker with one connection of the switch, the other connection needs to be soldered with the Anode (plus) of the LED (long one). Solder the Cathode (minus) of the battery holder directly with the Cathode (minus) of the LED (short one). Additionally you can put a resistor between this.
Pictures
irpen1
irpen2
irpen3
irpen4
If you have some questions or if you are interested in such an Infrared Pen like mine,
just write me an email!
http://www.webcam-whiteboard.com/?c=17&b=8
What do I need to build an infrared pen?
Basically just an old thick pen, an infrared LED, a small switch and a battery. But here you have the components I used for my infrared pen. I used some more extra components, because they make it easier to assemble everything.
Components:
* Infrared LED (wavelength: 850-880 nm, diameter: 5mm)
* LED Holder
* Puch Switch
* Coin Batteries (1,5V depends on your LED)
* Coin Battery Holder
* Marker (as thick as possible)
* Cables
Normally you would need a resistor because of the LED. But I didnt use one and the LED works over a year now, so I think its ok without.
How to build an infrared pen?
When you have all the components, you have to put them into your marker!
Therefore first split you marker vertically in two parts, you can saw or cut it for example. So that you can put everything inside it. But first empty it.
After that make a hole for your switch, so that it exactly fits. Make two more small holes for the Coin Battery Holder connections. So that you can solder some cables at the holder in the marker. You can also make a small hole into the holder to screw the it onto the marker.
Take your LED and put it in the LED holder. You can fix it with glue in the tip of the marker.
Now you can solder everything. Solder the Anode (plus) of the Coin Battery Holder in the marker with one connection of the switch, the other connection needs to be soldered with the Anode (plus) of the LED (long one). Solder the Cathode (minus) of the battery holder directly with the Cathode (minus) of the LED (short one). Additionally you can put a resistor between this.
Pictures
irpen1
irpen2
irpen3
irpen4
If you have some questions or if you are interested in such an Infrared Pen like mine,
just write me an email!
http://www.webcam-whiteboard.com/?c=17&b=8
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