Circuits & Schematics - Beginners

Subsection: "Beginners"
Search results: 56 Output: 1-10
  1. 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
  2. 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
  1. Ralf Kelz
    The exposure tester in this Design Idea measures the on time of a light source, whether an LED, an incandescent lamp, a halogen lamp, or another source. It can be made with an ordinary stopwatch and a few simple components (figures 1 and 2). An ...
    Oct 15, 2024
  2. Ken Yang
    Included among the many applications for pulse-width modulation (PWM) are voltage regulation, power-level control, and fan-speed control. A PWM circuit for such systems can be implemented with three op amps on a single quad-op-amp chip (Fig. 1). ...
    Aug 1, 2024
  3. Hesam Moshiri
    Story The high temperature of the power components is a known phenomenon in electronics. To overcome this challenge, the designers mount heatsinks on the components to dissipate the heat, however, in many commercial and home appliance devices, the ...
    May 15, 2024
  4. Tracy Allen
    Fig 1’s circuit, which was developed to monitor the traffic of bumblebees into and out of the hive, differentiates “a-to-b” motion from “b-to-a” motion. When used with an optical decoder, the circuit distinguishes ...
    Feb 1, 2024
  5. Chau Tran
    Streetlights, emergency lights, and security lights must automatically turn on when it gets dark. You base the control circuit on the resistance of a photoresistor or another LDR (light-dependent resistor) that varies with light intensity. An ...
    Oct 24, 2023
  6. Fred Hicks
    If someone in your family has the habit of not completely closing a drawer or perhaps the food freezer’s door you’ll appreciate this design. It senses an ajar door and, if the situation isn’t corrected within 20 sec, sounds a ...
    Sep 6, 2023
  7. Mithun K. Das
    Sometimes, you may need to make a DC/DC converter with minor components that can handle small loads. In this article, we are going to make something like that. This DC/DC converter using transistor has only a few components and can handle small ...
    Jan 12, 2023
  8. Vladimir Oleynik
    Safety fuses or fusible links see wide use in modern electronic equipment to protect the load and the power supply especially batteries against short circuits and excessive load current. Fuses are inexpensive and simple, and a wide range of parts ...
    Nov 15, 2022