Archive for September, 2008
Keys Finder
No commentsDiagram
Parts
R1 =10k
R2, R5, R8 =10M
R3, R4, R6, R7, R9 = 100k
R10 = 4k7
C1 = 22n
C2, C7 = 47n
C3 = 560n
C4 = 10u;/16V Tantalum
C5 = 1n5 C6 = 100n
C8 = 56n
C9 = 15p
D1…D4 = 1N4148
T1, T2 = BC547B IC1 = [...]
Hidden USB
No commentsHere is how to HIDE your USB Thumb Drive in RJ11 Connector
Tags: usb, hidden, hide+usb, thumb
Calculate Resistor Value
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( Source Voltage – LED Voltage Drop ) / Amps = OHMs
Source Voltage = 12 volts Voltage Drop = 9.3 volts
(3.1 typical for a blue or white LED)
Desired Current = 20 milliamps (again, a typical value)
the resistor we need is: (12 – 9.3) / ( 20 / 1000 ) = [...]
Read/Write Roman Numbers
No commentsTags: roman+numbers
Build your Network Cable
No commentsThere is two types of Common cables: 1- Cross Cable: Used to connect 2 Computers Only 2- Straight Cable: Used with the HUB (Switch) , Connecting many computers.
this is the Cross Cable Diagram:
This is the Straight Cable Diagram: CAT6
What you might not know about CAT5 & CAT6 is the following: [...]
USB Mini LED for your Computer
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Tags: led, usb
LED/Lamp Flashing Circuit
No commentsParts: R1 1M 1/4W Resistor R2 100R 1/4W Resistor R3 22R 1/4W Resistor C1 1µF 63V Electrolytic, Multi layer Ceramic or Polyester Capacitor D1 LED Any type and color Q1 2N3906 40V 200mA PNP Transistor Q2 2N3904 40V 200mA NPN Transistor SW1 SPST Switch B1 3V (Two 1.5V AA or AAA cells wired in [...]
20sec Voice Recorder Circuit
No commentsTags: voice+recorder, 20sec
Mysterious Light Bulb
No commentsPowers up by Human Statics
Use Burned Bulb
Clean it
Remove whatever is inside, but do not break it
How to Connect parts
Return everything back inside
It works when you use the RING to connect the Positive Part with the Negative have fun
Tags: bulb, trick
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