Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 7

61. How I Built a Wind Generator in My Backyard for $150. Part 2.
    Circuits Wind Energy Supply
    .. at 325 RPM, making it excellent as an electricity generator. However, pretty much any permanent magnet motor with a good volt/RPM ratio will do. Keep in mind that if you want to generate useful electricity, you will need to produce at ...
    .. (to measure angles for the hub) Sandpaper (various grits) Parts Required I wanted to be as minimal as possible with my design (I'm a poor college student), so I took the already simple designs from around the web and made them even ...
    Oct 19, 2009

62. How I home-built an electricity producing Wind turbine. Part 1
    Circuits Wind Energy
    .. tape drives). The best apparently are a couple of models of motor made by Ametek. The best motor made by Ametek is a 99 volt DC motor that works great as a generator. Unfortunately, they are almost impossible to locate these days. There ...
    .. out with complex issues, teach you electronics theory, help you locate parts, build a charge controller for you, or custom design a system for you. There just aren't enough hours in the day. Sorry. Update: Here is a video of the wind ...
    Oct 26, 2009
63. Wireless Weather Station. Part 1
    Circuits Wireless Measurement PIC16F873
    .. temperature and pressure sensors as well as to monitor the battery voltage. To maximize accuracy I used an external 4.096 volt 0.1% reference from National Semiconductor. With the 10-bit A/D, this provides a resolution of 4mV per count. The ...
    .. the airport or some other remote location. But, what are conditions like in my backyard? To address this, I embarked on the design of the Wireless Weather Station. I had meant to do this project many years ago but two bits of technology ...
    Dec 22, 2009
64. Micro wind power with a Savonius rotor. Part 2.
    Circuits Wind Energy
    .. a Savonius rotor. At 200 RPM the output is only about four or five volts. While this is obviously not enough to charge a 12 volt battery by itself, a bit of clever circuitry solved the problem. Some time back a circuit was published in one of ...
    .. shaft! The rotor slides directly onto the end of the motor shaft, and is held in place with a stainless steel bolt. In this design, I decided to see if I could do away with having a top bearing. The bearings in the tape drive motor are at ...
    Nov 1, 2010
65. A simple solar panel regulator
    Circuits Power Solar
    .. off and there is absolutely no current drain from the battery. When the sun gets up and panel starts producing at least 10 Volt, the LED lights and the two smalltransistors switch on. This powers the regulator circuit. As long as the battery ...
    .. one has to choose the most appropriate type of regulator. In most solar installations I have used my linear solar regulator design, which has the advantages of smooth voltage regulation and undervoltage load dumping, at the cost of higher ...
    Dec 5, 2010
66. SEPIC/Ćuk converter sprouts second output
    Circuits Supply Texas Instruments LM3488
    .. Figure 1. Dual-output hybrid SEPIC-Ćuk converter. To find out the output voltages we apply the principle of inductor volt-second balance and capacitor charge balance. To simplify the calculus, we neglect the voltage drop over the ...
    .. EDN Many applications require positive and negative supply voltages, with only one voltage requiring tight regulation. This Design Idea describes a dual-output, hybrid SEPIC-Ćuk converter whose positive output voltage can be lesser or ...
    Aug 10, 2017
67. Multiple power supplies fortify high-side gate control
    Steven Hendrix
    Circuits Supply Microchip MIC4680
    .. transition. Instead, transistors Q610 and Q611 are simple source-followers. As the gate voltage rises more than about a volt above the present value of net VeeDrive shown in Figure 1 at the source terminals of Q610 and Q611, Q611 turns ...
    .. a recent design project, a robust power supply was needed to control the gates of high-side FETs. Optocouplers readily ...
    Feb 14, 2024
68. Robot shield for Arduino. Part 1 - Hardware and Schematic
    Circuits Embedded Systems Microcontrollers Usage Robots Arduino
    .. already prepared for all these functions, it is easy to install and use. We see now the considerations that led us to the design of this shield: must have a high voltage range will provide a stabilized output for the servos will provide ...
    Oct 31, 2012
69. High Power RGB LED Color Mixing
    Circuits Light Power CAT4101
    .. utilizing 1 amp maximum constant current drivers that are adjustable with trimmer potentiometers and powered from a 5 volt DC supply. Figure 1. Constant current drive circuit. With a 500 millivolt minimum above VF of the LED die, this ...
    .. aspect of high powered RGB LEDs on which we will focus. In order to produce consistent and repeatable colors, the first design criteria that must be met is that of a constant drive current for each of the RGB die. As shown in Figure 1, ...
    Mar 18, 2015
70. Microcontroller Solves Complex Temperature Polynomial Equations
    Ricardo Jimenez Roberto Solorio
    Circuits Microcontrollers Usage Theory LM103 PIC16F887
    .. a sampling time of 50 µs. The thermistor’s voltage reading is stored in binary format in the variable “ volt ” with the instruction ADCIN 0, volt . Then, this reading is multiplied by 48,828 to convert it to decimal, ...
    .. is the polynomial “Steinhart-Hart” equation (S-H), which has an error of 0.1 C. The temperature range for this design is from 0 C to 100 C. Three thermistor coefficients A, B, and C are required to implement the S-H equation. ...
    May 20, 2015

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