Circuits & Schematics - 5

Search results: 2,953 Output: 41-50
  1. Thanks to a combination of low initial cost and low on-resistance, a conventional electromechanical relay often makes sense for switching large amounts of load current on and off and when proportional control of the load's current or voltage is ...
    06-09-2022
  2. A fixed-frequency signal generator that can produce outputs simultaneously at multiple phases such as 45 , 90 , 135 , and 180 is sometimes needed for testing multi-channel analog-to-digital converters (ADCs), analog filters, sample/hold circuits, ...
    05-09-2022
China PCB Prototype and Fabrication Manufacturer
  1. A recent Design Idea prompted me to offer the simpler solution that I used in a recent project (Reference 1). We needed a momentary power switch with processor supervision. This supervision would allow the processor to delay a power-down request ...
    01-09-2022
  2. Common designs for touch switches detect a decrease in resistance when a user's fingertip either connects a contact to the circuit's common ground or supplies an injection of 60-Hz ac voltage, resulting from immersion in the electrostatic ...
    31-08-2022
  1. A 4- to 20-mA current loop consists of a power source and a current-measuring device at the control end and a field transmitter that senses process-variable information, such as temperature or pressure, and converts it to a current (Figure 1). Most ...
    25-08-2022
  2. You can remotely measure temperature using a 4- to 20-mA current loop as long as 4000 feet and a battery-powered, white-light LED driver. You usually configure this equipment to provide a programmable, constant current to an LED from a battery ...
    25-08-2022
  3. Among the many methods available for air flow detection, self-heated thermal flow sensors are simple, cheap, rugged, and sensitive. They rely on the relationship between airspeed (V F ) and thermal impedance (Z T = C/W) of a heated sensor as shown ...
    23-08-2022
  4. Circuits sometimes need a gain-of-one buffer to lower output impedance and prevent the load from interfering with the previous stage. For an application involving a 1.5-MHz, low-power transmitter and antenna, a BUF634 buffer IC would work, but a ...
    23-08-2022
  5. Passive current shunts for measuring the value of current flowing through a relatively small-value resistor often have a full-scale voltage drop of 60 mV for higher-power equipment and 200 mV for electronic instruments. Similarly, simple ...
    22-08-2022
  6. Today’s small electronic appliances, such as washers, dryers, and stoves, use switched-mode power supplies to replace bulky, heavy, linear-power supplies. The engineer testing these power supplies, which range in current from 50 mA to 1 A, ...
    18-08-2022