Circuits & Schematics: Wire - 3

21. Automotive link uses single wire
    Anthony Smith
    Circuits Automotive Interfaces
    .. industry, in which the goal is to produce cars with simpler, lighter wiring looms, any interface that uses just one wire instead of two offers a distinct advantage. The circuit in Figure 1 implements a bidirectional link using a ...
    Apr 23, 2024

22. 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 ...
    Sep 2, 2024
23. DC power wire also carries clock or data
    Mike Hardwick
    Circuits Interfaces Supply Texas Instruments LMC7211-N
    .. 1 depicts a subsystem that receives power from its host system and simultaneously transmits a clock signal back on the same wire. The circuit uses the clock in the remote system to modulate power-supply current via an open-collector driver or ...
    Oct 3, 2024
24. A two-wire temperature transmitter using an RTD sensor
    Jayapal Ramalingam
    Circuits Analogue Design Measurement Texas Instruments INA122 LM334 XTR116U CD40106B
    .. “DIY RTD for a DMM” ( Ref. 1 ). With a fortnight’s struggle, I completed the design of 4 mA to 20 mA, two-wire temperature transmitter using a platinum resistance temperature detector (RTD) sensor, as shown in Figure 1. ...
    Jun 11, 2025
25. Simple but accurate 4 to 20 mA two-wire transmitter for PRTDs
    Stephen Woodward
    Circuits Analogue Design Measurement Interfaces Analog Devices LM4040
    Accurate, inexpensive, and mature platinum resistance temperature detectors (PRTDs) with an operating range extending from the cryogenic to the incendiary are a gold (no! platinum! ) standard for temperature measurement. Similarly, the 4 to 20 mA ...
    Sep 2, 2025
26. Two-wire precision current source with wide current range
    Stephen Woodward
    Circuits Analogue Design Supply Analog Devices LM4041
    .. interesting analog design problem is the precision current source. Many good designs are available, but most are the three-wire types that can be used as a positive (see Figure 1) or a negative (Figure 2) polarity source, but not both from ...
    Dec 18, 2025
27. SCR topology transmogrifies into BJT two-wire precision current source
    Stephen Woodward
    Circuits Supply Fairchild LM317
    .. frequent Design Idea (DI) author Christopher Paul showcased an innovative and high performance true-two-wire current source using a depletion mode MOSFET as the pass device in “A precision, voltage-compliant current ...
    Jan 15, 2026
28. An LM317-based 0-20 mA to 4-20 mA 2-wire converter
    Ashutosh Sapre
    Circuits Analogue Design Measurement Interfaces Fairchild LM317
    .. 1 ) used the LM337 regulator in a novel circuit arrangement to translate an input 0-20 mA current source into a 4-20 mA two-wire transmitter current loop (a standard two-terminal industrial current source). The circuit can also be flipped ...
    Mar 5, 2026
29. Linearly variable two-wire loop current generator
    Jayapal Ramalingam
    Circuits Measurement Interfaces Texas Instruments LM124
    .. such as the design described here implement useful tools for a diversity of calibration and testing applications A two-wire loop current generator is a useful tool for the testing, calibration and commissioning of current-to-pressure ...
    Apr 24, 2026
30. Active Antenna for AM, FM, SW
    Circuits Radio
    .. can be used for AM, FM, and Shortwave(SW). On the shortwave band this active antenna is comparable to a 20 to 30 foot wire antenna. It is further more designed to be used on receivers that use untuned wire antennas, such as inexpensive ...
    Feb 10, 2007

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