Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 6

51. Simple speedy single-slope ADC
    Stephen Woodward
    Circuits Measurement Microcontrollers Usage Texas Instruments LM4041N TS5A3160
    .. and taken as its digital conversion. We recently saw an example contributed by Dr. Jordan Dimitrov to our own friendly Design Idea (DI) corner in “Voltage-to-period converter offers high linearity and fast operation” ( Ref. ...
    Jan 12, 2026

52. Ignoring the regulator's reference
    Stephen Woodward
    Circuits Supply Texas Instruments TLV9151
    .. control (via PWM or other source) of regulators is a popular design topic here in editor Aalyia Shaukat’s Design Ideas (DIs) corner. There’s even a special aspect of ...
    Dec 24, 2025
53. Read isolated digital signals without power drain
    Alfredo Saab
    Circuits Measurement Digital Texas Instruments MAX5048 MAX913
    .. circuit, if carefully built, is determined by T 2 's interwinding capacitance. Using the core specified, plus 24-gauge wire with Teflon insulation, the resultant interwinding capacitance is less than 0.2 pF. Acquisition delay from the ...
    .. voltage for the isolation barrier depends on the type of insulation used in the single-turn windings and in PC-board design and construction. Teflon or Kapton insulation, for example, allows a barrier voltage of several kilovolts. ...
    Dec 24, 2025
54. 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
55. Buck boost converter using XL6019 (bifilar choke)
    Hesam Moshiri
    Circuits Supply XLSemi XL6019
    .. can deliver up to 2 A of output current when a heatsink is installed on the chip to manage heat dissipation. This converter design, featuring a bifilar-wound common-mode choke with the XL6019 chip, is very likely being shared online for the ...
    Dec 16, 2025
56. Adjustable load
    David Johnson-Davies
    Circuits Measurement Supply Microcontrollers Usage Microchip ATtiny84A
    .. load in an earlier project, Adjustable Load [ 2 ], but unfortunately I had dismantled the prototype, so I decided to design a PCB for a new circuit. Initially I thought of updating the design to use an OLED display, rather than the ...
    Dec 14, 2025
57. Solar mason jar light
    David A. Johnson
    Circuits Supply Light Solar Toshiba TC4S584F
    .. a 1/8 inch hole in the jar lid. Figure 2. Cut ring from PVC pipe fitting. I soldered two wires onto the underside of a 5 volt 160 mA 10 cell 3” × 3” solar panel (Figure 3), then fed them through the hole before gluing the ...
    Dec 10, 2025
58. Silly simple precision 0/20 mA to 4/20 mA converter
    Stephen Woodward
    Circuits Analogue Design Measurement Interfaces ON Semiconductor LM337
    .. loop current. Set input = 20.00 mA. Adjust R2 for 20.00 mA loop current. Done. The input voltage burden is a negative 1.0 volt. The output loop voltage drop is 4 volts minimum to 40 volts maximum. The maximum ambient temperature (with no U1 ...
    .. Design Idea (DI) offers an alternative solution for an application borrowed from frequent DI contributor R. Jayapal, ...
    Dec 6, 2025
59. A 0-20mA source current to 4-20mA loop current converter
    Jayapal Ramalingam
    Circuits Analogue Design Measurement Interfaces STMicroelectronics LM124
    .. record, and control these process parameters. This equipment will supply 24 VDC to a typical transmitter through one wire and receive current proportional to the process parameter through another wire. Typically, two wires are needed ...
    Dec 5, 2025
60. Gold-plated PWM-control of linear and switching regulators
    Christopher Paul
    Circuits Supply Microcontrollers Usage Texas Instruments OPA2376 SN74AC04
    .. value of V IN is required by the regulator, an inexpensive LDO can provide an appropriate U 2 supply. I grant that this design might be overkill, but I wanted to see what might be required to meet the goals I set. But who knows, ...
    Dec 4, 2025

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