Circuits & Schematics: Design - 9

81. Circuit transmits ARINC 429 data
    Stephen Woodward
    Circuits Interfaces Texas Instruments CD74HC08 CD74HC390 CD74HC40105 CD74HC4052
    .. in 5 V microcontroller-based designs. The circuit in Figure 1 serves the Tx (transmit/output) portion of the 429 spec. The design implements a high-speed ARINC-429-compliant transmit function using a single 5 V supply rail and 74HC series ...
    Dec 4, 2023

82. HV flyback converter improves efficiency
    Anil Maini Nakul Maini Varsha Agrawal
    Circuits Supply Texas Instruments LM311 LM555 VFC32BM CD4011A
    .. Design Idea significantly improves conversion efficiency of externally driven flyback converter-based capacitor ...
    Dec 1, 2023

83. UVP protects rechargeable batteries
    Peter Demchenko
    Circuits Supply Diodes TL431
    .. rechargeable battery types can be damaged by deep discharge. This Design Idea circuit performs under-voltage protection (UVP) to prevent this, as well as acting as a load switch ...
    Nov 30, 2023
84. Exclusively select 1 of N relays
    Viktor Safronov
    Circuits Supply ECE EDR2
    .. you may need a group of switches where, if any switch is activated, it deactivates the previously active switch. This Design Idea implements such a function with relays. This “one and only one” function is often ...
    Nov 24, 2023
85. Simultaneously control gain on two independent channels with a single element pot
    Stephen Woodward
    Circuits Analogue Design Audio
    .. two Howland current pumps, a differential amplifier, and a boatload of precision resistors; it is also DC coupled. This design idea offers an alternative. It avoids the liabilities of dual element ganged pots by controlling the gain of ...
    Nov 23, 2023
86. Status indicator flags five discharge states
    Glen Chenier
    Circuits Measurement Supply STMicroelectronics LM358
    .. just one leftover op amp or comparator, you can add a battery-condition indicator to your portable circuit design. To indicate the life in an aging battery visually, the circuit in Figure 1 varies the duty cycle and flash ...
    Nov 20, 2023
87. Circuit lets you isolate and measure current
    Anton Mayer
    Circuits Measurement STMicroelectronics L272 LM358
    .. often need to measure current during circuit design and debugging. You can perform that task by breaking a path, inserting a shunt resistor, measuring its ...
    Nov 19, 2023
88. DIY solar tracker system
    P. Marian
    Circuits Automation Solar
    .. generates information for the motor that rotates the panels for tracking the sun. DIY sun tracking sensor The sensor design is shown in Figure 2. P1 and P2 are adjusted in such way that the motor stands still when the LDRs get the ...
    Nov 14, 2023
89. The DAC buddy
    Stephen Woodward
    Circuits Measurement Signal Processing, Filters Texas Instruments TLV2371-Q1
    .. design idea contributor, Peter Demchenko, recently published “Extending the resolution of a peripheral ...
    Nov 9, 2023
90. DIY LED display provides extra functions and PWM
    Peter Demchenko
    Circuits Microcontrollers Usage Digital Texas Instruments CD74HC14 CD74HC132 CD74HC137 CD74HC259
    .. design idea (Figure 1) shows how easily “new flesh can be added to the old bones” and how some new ...
    Nov 6, 2023

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