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. 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
28. Arduino expansion board used for controlling large numbers of LEDs
    Circuits Embedded Systems Light Arduino
    .. is using an ATX power supply, with Sparkfun's adapter board(you need this too) and this adapter. You would solder the red wire to 5v on the adapter board, and the black wire to ground. Please note that you must also connect PS_ON to ground. ...
    Nov 1, 2011
29. Understanding amplifier power ratings. RMS power. DIN power. PMPO (Peak Music Power). Speaker power ratings. Methods for making 4 ohm speaker to appear as 8 ohm. Dampling factor. What is amplifier "bridging" or "monoblocking"?
    Circuits Audio Measurement
    .. down, or may overheat and burn up (all the magic blue smoke leaks out). Methods for making 4 ohm speaker to appear as 8 ohm Wire a 4-ohm power resistor (10-20 watt) in series with each 4-ohm speaker. This makes the system to be appear as 8 ...
    Sep 4, 2005
30. Short DC Power-Line Pulses Afford Remote Control
    Tom Hornak
    Circuits Supply Light Texas Instruments CD74HC14
    .. 1. Pushing the on switch S 1 or S 2 for approximately 1 sec inserts the 12 V zener diodes D 1 or D 2 in series with the hot wire of the power line. During the push, the polarity-dependent conduction of the zener diodes creates a small ...
    Nov 3, 2022

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