Circuits & Schematics Texas Instruments

1. 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
2. 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

3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. Negative time-constant and PWM program a versatile ADC front end
   Stephen Woodward
   Circuits Analogue Design Measurement Texas Instruments TLV9164
   A variety of analog front-end functions typically assist ADCs to do their jobs. These include instrumentation amplifiers (INA), digitally programmable gain (DPG), and sample and holds (S H). The circuit in Figure 1 is a bit atypical in merging all ...
   Nov 18, 2024
10. A fully analog electronic dice
    Patrick Van Torre
    Circuits Analogue Design Games Texas Instruments LM324 TLV2374
    An electronic dice is always an enjoyable project, which is easy to implement with some lines of program code on a microcontroller, or with a few digital components. However, implementing an electronic dice in analog technology is more of a ...
    Nov 15, 2024

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