Circuits & Schematics: 1 -Wire Barometer - 5/10 Volt Design vrs 2

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Search results: 1,570 Output: 1-10   Including: 10 (1082); Design (943); Wire (259); Volt (97); Barometer (3); vrs (0).
  1. .. W. Bray This article describes details for constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation 1-Wire network. It differs from the popular ...
    .. pressures the MPX4115 output voltage ranges from about 4.25 to 3.79 volts at sea level, and about 2.77 to 2.45 volts at 10,000 feet. Most of this range is above the active voltage range of a 5 volt opamp circuit. In effect the sensor ...
    .. from the popular Version 1.1a in that it has more than twice the resolution. As with 1-Wire Barometer Version 1.1a, this design uses a Motorola MPX4115 Silicon Pressure Sensor, a Dallas Semiconductor DS2438 Smart Battery Monitor (to ...
    10-01-2010
  1. .. printed circuit board. Not only is the printed circuit board designed to be modified for different voltage sources and 1-wire networks, but the values of the resistors can be modified for different ranges of barometric pressure and ...
    .. for Calibration and Alternative Barometer Designs The design presented in the schematic above is not the only possible barometer that can be ...
    .. full details baro20schematic.zip . Recommended to help construction. Needed for option modifications. It will print on 8 x 10 paper. Simulators simulators.zip . Printed circuit boards for making your own boards: baro20pc.zip . Parts List This ...
    .. as well as others. U1 LM358N #512-LM358N U5 LM78L05 #511-L78L05ACZ U4 L78M10 #511-L78M10CV D1-D3 1N5817 #583-1N5817 D4 5 volt LED #512-MR5460 Resistors (all fixed resistors 1/4 watt metal film). R1 100K R3 5K pot #72-T93YA-5K For a 1 inHg ...
    12-01-2010
  1. .. it on the spread sheet. Make another plot for U1A and the DS2438 by recording the input voltage at LM358 pin 3 and the 1-Wire output of the DS2438. Select the best linear range by examining the plots. Using this data with the Design ...
    .. on Final Calibration Getting your barometer accuracy calibrated will take adjustment over several cycles of barometric pressure change. The initial ...
    .. = 4.25 , and the minimum voltage at 28 in Hg is: 2.45. A range of 4.25 to 2.45 is required to allow locations as high as 10,000 feet. To get the very best resolution you need to establish the linear range of the opamp and DS2438. To do this: ...
    .. you consider satisfactory. Happy Construction! Technical Details The Version 1.1a web page gives complete details of its design. Those details largely apply to this design also. The available Design Simulator computes much of this ...
    04-03-2010
  2. .. as well for now. The coils The RM10 core and the two 12 uH coils weren't available either so I had to buy some cobber wire and some ferrite cores and do the coils myself. I got a spool of 0.75 mm insulated cobberwire, a couple ferrite ...
    .. a spot of epoxy in it to keep it from making noise [...]. RM is a generic classification for this type of ferrite core, and 10 is the size. If you can't find one, you can use a clamshell open core such as sold by RadioShack for reducing ...
    .. design. First is a 6 amp Polyswitch fuse, it is self-resetting, and also protects against high temperatures. Next is an 18 volt surge absorber. Finally, the circuit has current limiting using a method I invented that limits based on ...
    31-10-2007
  3. .. is simply two conductors that are bridged by the rain water. A simple sensor is shown below. Two conductors of bare copper wire are woven through the holes so that the conductors are near each other but do not come into contact. Notice the ...
    .. it a dripping water sound which seems appropriate. A slower, longer beep may be had by increasing the 1 uF capacitor. The 10 k resistor may be increased for a longer beep time without decreasing the beep rate but at some point the circuit ...
    .. close values are OK although the values shown are quite common. The 1 uF capacitor may be just about any type, with a 16 volt aluminum electrolytic being the most likely choice. The capacitor will see about 1/2 volt reverse bias at times ...
    .. cable is used to connect to the electronics. The sensor above will last a reasonable length of time but a more permanent design is shown below: Here it is after 18 months or so: It's still working fine but showing some signs of age. ...
    05-11-2008
  4. .. Battery Clip standard battery snap Battery 9 volt rectangular - Alkaline recommended Probe pin jack or similar with short wire probe Case Altoids mint tin or similar metal box The probe should be built into a metal box so that one hand ...
    .. user's body forms the other connection through the beeper's metal case. When the beeper is properly adjusted it draws only 10 uA with nothing touching the probe - no power switch is required. This design is optimized for capacitors less than ...
    .. 1 meg. in series with 470k) R6 39 k R7 33 k R8 100 ohm C1 0.047 uF (not critical) C2 30 pF (or more) trimmer C3 100 uF, 10 volt or more Q1 2N4403 (substitution risky) Q2 MPS-A18 (substitution probably won't work) Q3 MPS-A56 (sub may work - ...
    12-11-2008
  5. .. gets its energy from the interaction of the moving magnetic field of the magnet in the flashlight and the coil of wire wrapped around the tube the magnet slides through. The moving magnetic field causes electrons in the coil to move ...
    .. reached the voltage threshold necessary to activate the MintyBoost. Both of these tests were conducted over a period of 10 minutes. The rider pedaled for the first 5, then we observed how the voltages would react for the final 5 minutes. ...
    .. store and safely handle. Once the BOOSTCAP attains 1.2 volts, it has enough power to allow the MintyBoost to provide a 5 volt source for the device being charged. On the input wires we attached a 5A diode so that we don't get an ...
    .. Faraday flashlights do. However, we had a problem. To quote my team mate Nick Ciarelli, At first we considered using a design similar to one of those shake-up flashlights and converting it so that a runner could strap it on for a run ...
    25-05-2009
  6. .. and you will be working in a small space, typically less than the width of a battery or less than 10mm. Flexible stranded wire is the best to use here. Below is the finished view of my front panel adapter.
    04-10-2010
  7. .. its own power-supply voltage and the current that Q 3 provides. At power-on, Q 2 , Q 3 , and Q 4 are all off. Resistor R 10 draws a small amount of start-up current, which Q 3 amplifies to start the current-mirror process. When sufficient ...
    .. clockwise. On Range C, an external voltage source that connects to R 13 controls the load current at a rate of 1 A per volt with P 1 set fully clockwise. You can drive the external input with a function generator to test a power ...
    .. This Design Idea presents a self-powered, precision-active-load circuit that improves on a previously published design ...
    10-09-2020
  8. .. Shannon decoding depends on the accuracy of conversion timing relative to T, as shown in Figure 3, showing the effect of 10% RC value error producing a ~2% = 5 LSB conversion error. This is clearly not compatible with true 8 bit (let alone ...
    .. it relies on electromechanical relays for switching, the archaic technology being attractive because this SD has a 300-volt full scale output. There are of course ways to implement solid state (i.e., fast) switching solutions that can ...
    .. time. Of course, whether “nT” is really fast really depends on how long T really is! Figure 1 presents an SD design in which T = 500 ms (!), making an 8 bit conversion require nT = 8 × 0.5 = 4 seconds! In what ...
    06-07-2023

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