Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 10

91. Extreme Business Cards
    Circuits Domestic Cellular
    .. the one on the left should have its positive side up. You can't see from this image, but you also need to solder a piece of wire between the two battery contacts on the opposite side of the board as well. The PIC is soldered to the PCB on the ...
    .. well. You can of course use a specialised PCB package, but I wanted an unusual cursive font on mine, so just hand-drew the design on a graphics package. This allowed me to incorporate my name into the actual circuit board - the electric ...
    Dec 11, 2007

92. Microcontroller Simplifies Battery-State-of-Charge Measurement
    Circuits Wind Energy Power Solar
    .. the battery's charge capability, you can send the data to a host processor or another destination through a single-wire interface, SPI, I2C, CAN (controller-area-network), or another industry-standard method. To maximize battery ...
    .. a positive-charging current. The outputs of both op amps are positive and range from 0 to approximately 5 V and simplify design of the interface with the ADC's multiplexed inputs. Using Texas Instruments' TLC27 7 for IC2 offers the ...
    Jan 21, 2008

93. Professional Looking Gadgets
    Circuits Tools and Technologies Beginners
    .. a lip around them, as this will hide an oversize or roughly-cut hole in either the plastic box or the transparency. Now you wire up your components / circuitry etc. Can't tell you how to do this, as it will depend on what you're building! ...
    .. image, you can see that each of these has a front panel area that is recessed by a fraction of an inch. Use a program to design the front panel overlay - I use Adobe Illustrator, but that is not the easiest to use (or the cheapest). ...
    Feb 4, 2008
94. Short Range Personal Radar. Sweeping Radar System - using a GP2D120 IR Sensor
    Circuits Radio Security
    .. 4 or 8 MHz Oscillator SPST Switch 1µF Capacitor 30 pin SIPs 5 x 74LS373 Latches Prototype Board Solder 36 x LEDs Wire 30 AWG (aka Wirewrap) Wirewrap Tool Soldering Iron Parts List Details You may or may not be familiar with the ...
    .. The schematic for this project is much more complicated than previous projects. There are four main features in our design. (1) We will be able to program the pic on the board we develop. (2) We will be controlling a servo. (3) We ...
    Feb 28, 2008
95. Hamster-Powered Night Light With Custom Low-RPM Alternator
    Circuits Wind Energy Supply
    .. tested it, and found we needed more voltage, so we ended up using 2 coils. Each coil is 400 turns of #30AWG enameled magnet wire. We used a simple hand-held coil winder, and made up a new center insert to get the coils the right size. The ...
    .. Skippy the Hamster powers this night light by running on his excercise wheel, the same concepts and low-rpm alternator design could be applied to a school science project using different energy sources! A small wind or hydro turbine ...
    Feb 29, 2008
96. How to Build Your First Robot
    Circuits Microcontrollers Usage Robots
    .. a disc or some other peripheral that comes with the servo. The 3 wires are: 2 for power, and one for signal. The signal-wire goes to something that controls a servo, in this case that is the microcontroller. Result is that the ...
    .. it is no problem if it does not. Add some double adhesive tape to the button of the server as well, and. Chose your own design, you can also add extra materials if my “design” is too simple. Main thing is that we have it all ...
    Mar 13, 2008
97. Personal G-Force Meter
    Circuits Automotive Measurement
    .. wired to output ground of the LM7805 to keep a steady 5 v DC. Sensor Circuit The sensor is very simply wired with one wire from the Y-axis measurement spot to the AN0 port on the PIC. This is an analog input port and we'll use it as ...
    .. method is to use a bubble inside the chip and then to measure that bubble's movement based on certain variables. Hardware Design Now that we've seen the schematic and a little bit of the theory let's take a look at the step-by-step ...
    Apr 30, 2008
98. How to build a USB device with a PIC 18F4550 or 18F. The 18F4550 experimentation board
    Circuits Interfaces MCU Open-Source Platforms Microcontrollers Usage Microchip PIC18F4550 PIC18F2550
    .. a multi-layer ceramic). Don't forget the 100 nF decoupling caps. Here is a possible implementation. You can look at the wire's colour of your USB cable: Black=GND, Red=+5 V, Green=Data+, White=Data- 4/1/2007 : IMPORTANT ERRATA - ...
    .. microcontrollers including a full-speed USB V2.0 compliant interface. With these MCU it's very easy for the hobbyist to design USB devices with very few components. In these pages, I'm describing how to use the CDC firmware from ...
    Sep 28, 2008
99. A Basic Coil Gun (Coil Pistol, Coil Rifle)
    Circuits Security
    .. considerable pain, minor electrical burns, and temporary muscular paralysis. What you need. Tools: Soldering iorn. Solder. Wire cutters. Hot air gun. Hot glue gun. Flathead screw driver. Parts: Used Disposable Camera. (Preferably of Fugifilm ...
    .. has a muzzle energy or arround 2 joules and a rechrge time of about 10 seconds. The gun is of a single shot bolt action design as I do not posess the machining skills needed to produce a semi-automatic clip mechanisim. The power source ...
    Oct 14, 2008
100. Build Your Own PC Interface
     Circuits Networks Interfaces
     .. type transistor radio plate. Dissemble and strip its windings. Wind 1500 turns primary and 1500 turns secondary with 44 SWG wire. Assemble it back. Purist may also add a layer between the two windings and ground one end to make a Faraday ...
     .. prone to Hum pickup. Use two lengths of single core shielded wire for respective connections. Finally the PCB. Fig 2.PCB design The drawing has all the details of PCB, schematics and component layout. Assemble it according to details ...
     Dec 2, 2008

Sort by: relevance / date