All Sections Texas Instruments - 3

21. More gated 555 astable multivibrators hit the ground running
    Circuits Texas Instruments LM555 LMC555
    A previous Design Idea “Gated 555 astable hits the ground running” ( Ref. 1 ) offered a fix for the problem of the excessively long first pulse that’s generated by traditional topology 555 astable circuits on start up when gated ...
    23-01-2024
22. Simple log-scale audio meter
    Circuits Texas Instruments TL081
    While refurbishing an ageing audio mixer, I decided that the level meters needed special attention. Their rather horrible 100 µA edgewise movements had VU-type scales, the drive electronics being just a diode (germanium?) and a resistor. ...
    22-01-2024

23. Gated 555 astable hits the ground running
    Circuits Texas Instruments LMC555 SN74HC04
    The classic and versatile 555 finds its way into many low to moderate frequency oscillator applications. Some of these require the ability to selectively gate oscillation on and off on demand and the 555’s RESET pin can conveniently be used ...
    18-01-2024
24. A simple, accurate, and efficient charge pump voltage inverter for $1 (in singles)
    Circuits Texas Instruments CD4053B
    Keeping op-amp outputs “live” at and below zero volts, generating symmetrical output signals, and processing bipolar analog inputs, are all examples of design situations where a few milliamps of negative voltage rail can be a necessity. ...
    10-01-2024
25. Squashed triangles: sines, but with teeth? Part 2
    Circuits Texas Instruments LM393 TL081 TLV237x
    Second test circuit I looked at several types of AGC circuits (strictly, Automatic Level Control). JFETs are the usual starting-point but are inherently non-linear and need to be surrounded by lots of stuff to limit the signal voltage across them ...
    09-01-2024
26. Squashed triangles: sines, but with teeth? Part 1
    Circuits Texas Instruments LM393 TL081 TLV237x
    A while ago, I needed (or wanted) a pocket-sized audio sine-wave generator: simple, stable, repeatable, single-gang control pot, 9 V battery-powered. A “squashed tri-wave” approach looked appropriate. While the principle is easy make a ...
    08-01-2024
27. Soft-start controller is gentle on loads
    Circuits Texas Instruments LM311 TLC555
    The control circuit in Figure 1 senses a given load and automatically soft-starts the load by synchronously adjusting the power to that load. You can also manually adjust the power delivered to the load by controlling the phase angle of the line ...
    01-01-2024
28. Adding one resistor improves anemometer analog linearity to better than ±0.5%
    Circuits Texas Instruments LM10 LMC555 2N5089
    Awhile back I published a simple design idea for a thermal airspeed sensor based on a self-heated Darlington transistor pair ( Ref. 1 ). See Figure 1. Figure 1. Older design idea with self-heated Darlington thermal airflow sensor. In the circuit, ...
    29-12-2023
29. New full-wave precision rectifier has versatile current mode outputs
    Circuits Texas Instruments TLV2371
    A classic analog application is the full-wave precision rectifier (absolute value) function. Many variations exist on this theme, each with its own supposed (often rather minor and sometimes downright dubious) advantages compared to competing ...
    22-12-2023
30. Single supply function generator outputs buffered squares, triangles, and sines
    Circuits Texas Instruments TLV9064
    The traditional analog function generator with its customary triple-threat ensemble of square, triangle, and sine waveform outputs is a familiar tool on electronics lab benches. It’s also a classical design exercise. Generally, the square and ...
    13-12-2023

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