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

51. Improve PWM controller-induced ripple in voltage regulators
    Christopher Paul
    Circuits Supply Toshiba CUS10S30
    .. incorporate PWM control of the output voltage requires some thought, and both Stephen Woodward and I have presented several Design Ideas (DIs) that address this. I’ve suggested disconnecting R G from ground and driving it from a ...
    Oct 6, 2025

52. Circuit controls ratiometric or simultaneous power-up of multiple rails
    Dirk Gehrke
    Circuits Supply Texas Instruments TPS54310 TPS54610
    .. the resistor-ratio change, IC 1 ’s output voltage ramps up to its final I/O-voltage value of 3.3 V. The MOSFET this design uses has an on-resistance of roughly 10 Ω. This figure might sound high, but, because of the ...
    Oct 6, 2025
53. PWM buck regulator interface generalized design equations
    Stephen Woodward
    Circuits Supply XLSemi XL4016
    .. while back, I published the Design Idea (DI) “Simple PWM interface can program regulators for V OUT V SENSE ” ( Ref. 1 )It showed ...
    Sep 24, 2025
54. Fake contacts, bounced to order
    Nick Cornford
    Circuits Measurement Microcontrollers Usage Texas Instruments CD74HC132 CD74HC4520
    .. recent Design Ideas ( Ref, 1 ) have involved button-pushing to control power. Some may have been more resistant to ...
    Sep 22, 2025
55. Positive analog feedback linearizes 4 to 20 mA PRTD transmitter
    Stephen Woodward
    Circuits Analogue Design Measurement Interfaces Texas Instruments LM10
    .. ideally be in a TO-220 or similar package if V LOOP 15 V. References Woodward, Stephen. Simple but accurate 4 to 20 mA two-wire transmitter for PRTDs. Williams, Jim. Signal Conditioning for Platinum Temperature Transducers. Materials on the ...
    .. recently published a simple design ( Ref. 1 ) for a platinum resistance detector (PRTD) 4 to 20 mA transmitter circuit, illustrated in Figure 1. ...
    Sep 14, 2025
56. Build automatic transfer switch (ATS) with simple analog electronics
    T.K. Hareendran
    Circuits Supply Texas Instruments NE555P
    .. or sketchy low-end options, this post is for you. The tried-and-true preliminary schematic In Figure 2 shows you how to design and build your own ATS using a handful of analog components you may already have in your parts bin. Figure 2. ...
    Sep 8, 2025
57. 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
58. Protect your boost converter
    T A Babu
    Circuits Supply XLSemi XL6009
    .. Usually a fuse, resettable or non-resettable, protects the system, but it is not always accurate or fast enough. This Design Idea shows a way to safeguard a boost converter from short circuits and reverse polarity application (Figure ...
    Sep 2, 2025
59. Micropower CMOS oscillator, draws only 0.5 µA
    David A. Johnson
    Circuits Oscillators Beginners Texas Instruments CD4007UB
    .. than necessary. The circuit shown generates a low frequency square wave signal while drawing only 0.5 microamps from a 6 volt supply. The circuit uses a number of N and P channel MOSFETs, contained within an inexpensive CD4007UB IC. The ...
    .. contained within an inexpensive CD4007UB IC. The circuit is inspired by a classic bipolar emitter coupled oscillator design and works in much the same way. The first N channel transistor is biased to the mid-supply point. The gate of ...
    Aug 31, 2025
60. A different twist to the power pushbutton problem: A kilowatt AC DAC
    Stephen Woodward
    Circuits Supply Power Texas Instruments CD4060B
    Design Idea (DI) contributors have recently explored various possibilities for ON/OFF power control using just a ...
    Aug 26, 2025

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