Circuits & Schematics - 3

Search results: 2,170 Output: 21-30
  1. Stephen Woodward
    I recently published a Design Idea (DI) showing some very simple circuits for PWM programming of standard regulator chips, both linear and switching, “Revisited: Three discretes suffice to interface PWM to switching regulators” ( Ref. 1 ...
    Jun 24, 2025
  2. Alberto Abal Pena Carlos Castro-Miguens José Benito Castro-Miguens Marcos Pérez-Suárez
    Some industrial applications require you to feed a low-power dc/dc converter from a three-phase source and possibly to deal with line-to-line voltages of 200 or 400 V rms. Further, the neutral terminal of the ac source may be unavailable for ...
    Jun 23, 2025
  1. R. V. Dhekale
    An inverter provides power backup for mains-based appliances in the event of a power failure. Most of the inverters available in the market have complicated circuit designs and are not very economical. Some of them produce a square-wave output, ...
    Jun 18, 2025
  2. Stephen Woodward
    Recently (5/21/25), I published a Design Idea (DI) describing a bidirectional current mirror using just two transistors and a diode, “A two-way mirror current mirror that is” ( Ref. 1 ). That circuit works well in some applications, ...
    Jun 12, 2025
  3. Nick Cornford
    In the first part ( Ref. 1 ) of this Design Idea (DI), we saw how to use the TDA7052A (or similar) power amp to build a minimalist siren-type power oscillator, and also, having looked at that device’s distortion characteristics under various ...
    Jun 12, 2025
  4. Nick Cornford
    Circuits Analogue Design Audio Oscillators NXP TDA7052A TDA7056A TDA7056B
    When audio power amplifiers oscillate, the result is often smoke, perhaps with a well-cooked PCB and a side order of fried tweeter. This two-part Design Idea (DI) shows some interesting ways of (mis-)using a common power amp to produce deliberate ...
    Jun 12, 2025
  5. Rod Elliott
    The voltage booster is a 'true' charge pump. When the output of the 555 is low, C4 charges from the supply via D1. When the output goes high, the positive end of C4 is forced high (to +24 V in a perfect world), and the charge is transferred ...
    Jun 12, 2025
  6. Rod Elliott
    Introduction These ultra-simple projects are intended to provide two simple functions without the need for transformers or 'esoteric' parts. The first is a simple charge-pump voltage booster, that will raise your supply voltage by a factor ...
    Jun 12, 2025
  7. Jayapal Ramalingam
    Designing an analog circuit can be a frustrating experience, as noted by Nick Cornford in his Design Idea (DI), “DIY RTD for a DMM” ( Ref. 1 ). With a fortnight’s struggle, I completed the design of 4 mA to 20 mA, two-wire ...
    Jun 11, 2025
  8. Stephen Woodward
    At its invention roughly four decades ago, STM (scanning tunneling microscopy) created a sensation because it was the first technology to make atomic-scale-resolution imaging a routine procedure. An essential requirement for the practical ...
    Jun 9, 2025