Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 3

21. 300 volt, 4 second, self-calibrating Shannon decoder DAC
    Stephen Woodward
    Circuits High Voltage Measurement Microchip LM4040
    .. 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 ...
    Jul 6, 2023

22. Compensate for four-wire sensor errors
    Circuits Measurement
    .. resistance rises and the other falls. Accurate measurements with resistive sensors require compensation for losses due to wire resistance, especially when wire lengths are tens of meters. The compensation method in this Design Idea relies ...
    Sep 22, 2011
23. Simple Circuit Interfaces 1-Wire Temperature Sensor To A Microcontroller
    Circuits Measurement Interfaces Microcontrollers Usage
    .. to their environments. Designers can add to the features offered by the circuit as well. The simple circuit interfaces a 1-Wire temperature sensor (DS18S20) to a Cypress microcontroller (CY8C26443). But the technique can be extended to any ...
    .. digital thermometer because it is a very cost-effective 1-Wire device and has an accuracy of 0.5 C, although the overall design achieves 1 C of accuracy including measurement error due to hardware limitations and test tools, etc. The ...
    Oct 28, 2012
24. Control the Voltage of a Remote Load Over Any Length of Copper Wire
    Philip Karantzalis
    Circuits Supply Power Linear Technology LT6110 LT3080 LT3976
    .. A common problem in power distribution systems is loss of regulation due to the cable/wire voltage drop between the regulator and the load. Any increase in wire resistance, cable length or load current ...
    .. to increase the regulator’s output by an amount equal to V DROP . An LT6110 cable/wire voltage drop compensation design is simple: set the I IOUT • R FA product equal to the maximum cable/wire voltage drop. Figure 1. No ...
    Oct 20, 2015
25. One wire brings power & data to LCD module
    Benabadji Noureddine
    Circuits Microcontrollers Usage
    .. to use this LCD module with a dedicated 8-pin PICmicro and consider it as an intelligent display. Figure 1. A low-cost one wire driven LCD module for external pin-limited system. The following design will be useful for any external ...
    .. 8-pin PICmicros have one pin as an input-only pin. Many solutions for expanding I/O pins have been described in EDN Design Ideas (references 1 to 3). In a pin-limited external embedded system, if an additionnal LCD display becomes ...
    Nov 13, 2014
26. Standard Bus Buffer Easily Extends 1-Wire Signal Off Board
    Circuits Interfaces Maxim PCA9600 DS18S20
    .. Choudankar Electronic Design The 1-Wire interface is low-cost and effective, but useful only for a very short distance; by using a standard bus-buffer ...
    Feb 14, 2016
27. One wire controls LCD module
    Rex Niven
    Circuits Interfaces Microcontrollers Usage ON Semiconductor CD4538
    .. the host. Figure 1. A typical LCD module. This hardware interface Design Idea (Figure 2) reduces the connection to just one wire, allowing a basic microcontroller with limited I/O to drive a large display, either directly, through a standard ...
    May 24, 2017
28. Two-wire, four-by-four-key keyboard interface saves power
    Stefano Salvatori
    Circuits Interfaces Microcontrollers Usage Texas Instruments MSP430F112
    .. can use a microcontroller that includes an ADC to design a two-wire-plus-ground keyboard interface. For example, you can use a resistive voltage divider to identify a pressed key ...
    May 16, 2022
29. Detect wire breaks with unusual CMOS gate circuit
    Raju Baddi
    Circuits Measurement Texas Instruments CD4050B CD4069UB CD40106B
    .. bits, and also operate in a more analog mode as shown in this Design Idea, which pinpoints the location of a break in a wire. First let’s look at the use of CMOS gates as memory devices. Figure 1 shows a one-bit transparent latch. A ...
    Jan 8, 2023
30. One-wire bus powers water-level sensor
    Dale Litwhiler
    Circuits Measurement Maxim DS2423
    .. drives a DS2423 pulse counter. A host PC or µC reads the output of the pulse counter via the Dallas Semiconductor one-wire bus ( Reference 1 ). The circuit uses approximately 150 µA of current, allowing the circuit to steal its ...
    .. of these capacitors is 0.2 in. These dimensions provide a measurement range of 4 in. with a resolution of 0.2 in. This design uses 1 MΩ for the oscillator timing resistor, RC, because the timing resistance must be much larger ...
    Sep 2, 2024

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