Circuits & Schematics Texas Instruments - 3

21. Microvolts to kilovolts in milliseconds with one I/O pin
    Stephen Woodward
    Circuits Measurement Microcontrollers Usage Texas Instruments LMC555
    Figure 1’s silly-simple voltage-to-time ADC is an exercise in dynamic range. Assuming that it is used with a 10-MHz counter/timer, its resolution is roughly 10 µV per count for inputs around 0 V and 100 mV per count at 1 kV, and it ...
    Jan 24, 2025
22. Practice safe dc/dc converter
    Eugene Kaplounovski
    Circuits Supply Texas Instruments LM2675
    Short-circuit protection is an obvious requirement for a power supply, especially when its load connects to a cable that's subject to damage. Many modern power-converter ICs include some means of protection, such as thermal shutdown, against ...
    Jan 22, 2025

23. Capture 16-bit readings of 8 thermistors in less than 1 second for $2
    Stephen Woodward
    Circuits Measurement Signal Processing, Filters Texas Instruments CD74HC4051 CD74HC4053
    Figure 1 is a cheap and cheerful voltage inverter I offered awhile back in “A simple, accurate, and efficient charge pump voltage inverter for $1” ( Ref. 1 ). Figure 1. The generic and versatile xx4053 provides the basis for a cheap, ...
    Jan 14, 2025
24. 2 GHz active probe. Part 2
    James Wilson
    Circuits Measurement Texas Instruments BUF802 OPA140 TPS7A39
    Mystery solved? Not quite. I made a test coupon of the output transmission line and measured it. Over the crossover region, it showed a mere 0.04 dB loss with increasing frequency, much less than the measured result. I turned my attention back to ...
    Jan 9, 2025
25. 2 GHz active probe. Part 1 - Searching for solutions
    James Wilson
    Circuits Measurement Texas Instruments BUF802 OPA140 TPS7A39
    Students, hobbyists, and professionals today enjoy unprecedented access to powerful and affordable test equipment for understanding and building electronic projects. But as enthusiast projects have become more advanced and ambitious, it is still ...
    Jan 9, 2025
26. Symmetrical 10 V, 1.5 A PWM-programmed power supply
    Stephen Woodward
    Circuits Supply Texas Instruments CD4053B
    Variable regulated power supplies are handy tools found on well-equipped electronics lab benches. The symmetrical varieties that produce equal voltage outputs of opposite polarity, are even more so. Figure 1’s version of a symmetrical 0 V to ...
    Dec 26, 2024
27. Ultrasonic mist maker (DIY)
    T.K. Hareendran
    Circuits Analogue Design Oscillators Texas Instruments NE555P
    I needed a simple mist maker/humidifier for a project that I was working on. I found lots of ideas on the internet, but they all lacked in one area or another, so I decided to design one. The following lays out my easy-to-build ultrasonic mist ...
    Dec 24, 2024
28. Temperature-sensor circuit provides dual-slope output
    Daniel Burton
    Circuits Measurement Texas Instruments LM19 LM61
    The excellent linearity of integrated-circuit temperature sensors makes them ideal for direct analog compensation of the thermally induced errors inherent in many circuits. For example, a negative-sloped temperature sensor could compensate for an ...
    Dec 9, 2024
29. Low-power PWM circuit is simple, inexpensive
    Anthony Smith
    Circuits Oscillators Supply Texas Instruments SN74HC14
    A common technique for implementing PWM involves comparing a triangular waveform of fixed amplitude and frequency with a variable dc voltage level. Although this approach results in a PWM signal of precise frequency and with duty cycle variable ...
    Nov 29, 2024
30. RS-232 meets voltage-to-frequency converter
    Stephen Woodward
    Circuits Measurement Interfaces Texas Instruments CD4053B
    In the early days of personal computers, incorporation of one or two (or more) RS-232 serial ports as general purpose I/O adaptors was common practice. Recently, this “vintage” standard has been largely replaced (after all, it is 64 ...
    Nov 19, 2024

Sort by: relevance / date