Passive filter circuits : Worksheet. Question 1: In very simple, qualitative terms, rate the impedance of capacitors and inductors as ßeen" by low-frequency and high-frequency signals alike: Capacitor as it äppears" to a low frequency signal: (high or low) impedance? Capacitor as it äppears" to a high frequency signal: (high or low) impedance? Inductor as it äppears" to a low frequency signal: (high or low) impedance? Inductor as it äppears" to a high frequency signal: (high or low) impedance? Capacitor as it äppears" to a low frequency signal: high impedance. Capacitor as it äppears" to a high frequency signal: low impedance.
Inductor as it äppears" to a low frequency signal: low impedance. Inductor as it äppears" to a high frequency signal: high impedance. Challenge question: what does a capacitor äppear" as to a DC signal? Notes: Ask your students how they arrived at their answers for these qualitative assessments. Question 2: Question 3: Hint: this only requires a single component per tweeter! Question 4: Question 5: Question 6: 101 - 200 Transistor Circuits. E-book. It contains a further 100 circuits, with many of them containing one or more Integrated Circuits (ICs).
It's amazing what you can do with transistors but when Integrated Circuits came along, the whole field of electronics exploded. IC's can handle both analogue as well as digital signals but before their arrival, nearly all circuits were analogue or very simple "digital" switching circuits. Let's explain what we mean. The word analogue is a waveform or signal that is changing (increasing and decreasing) at a constant or non constant rate.
But let's crawl before we walk and come to understand how to interface some of these chips to external components. Colin Mitchell TALKING ELECTRONICS. To save space we have not provided lengthy explanations of how the circuits work. KIT OF PARTS Talking Electronics supplies a kit of parts that can be used to build the majority of the circuits in this book. MORE INTRO There are two ways to learn electronics. LED Testing. Electronic Circuits - Free Electronic Circuits. Electronic Circuits on Circuit Exchange International (CXI)
Termocouple. DC Circuits. Dc-dc converters, switching mode power supply, power electronics, Pspice. Live-line Detector - circuit diagrams, schematics, electronic projects. Electronic Stethoscope. LC meter, Coil Capacitor meter. This LC meter circuit can measure coils and capacitors. When Lx or Cx is connected in the circuit the oscillator frequency will decrease and this decrease is measured by a frequency-voltage converter build with T3 and T4. To adjust this lc meter circuit with P1 and P2. LC meter precision is 3%. Scale calibration can be achieved with this formula: ni = nm(1 – fr)/(1 – fc) where ni is number of divisions measured on the scale, nm = total number of division of the scale, fr = relative frequency, fc = the smallest relative frequency measured.
The total power consumption is 12mA at 12V when the LC measurement occur. Coil Capacitor meter schematic components. YO5OFH, Csaba's HAM Radio Home Pages - Мозилин фајерфокс (Mozilla Firefox) Mike's Electric Stuff. 555 Timer Tutorials. Circuit diagrams search engine :: High-Voltage-Lab.com :: audio, radio, sensors, digital electronics... Hobby projects - Simple electronic circuits. Computer microphones Learn how to interface electret and dynamic microphones to the standard computer sound card. Metal detectors Theory of operation and schematics of the most common metal detectors used today: Very Low Frequency (VLF), Pulse Induction (PI) and Beat-Frequency Oscillator (BFO).
Wireless microphone The wireless microphone transmitter can be built in an afternoon with simple, affordable and widely available parts. Soldermans Basic Electronics: Binary and Hex - Мозилин фајерфокс (Mozilla Firefox) Computers understand numbers and logic, as most are digital computers. The Binary Hexadecimal System is the way the numbers or logical commands are instructed to the computer. All input devices or sensors must finally talk this language to the CPU, and all outputs and actuators must be able to understand this numbers to do their job.
A bimetallic thermostat is like a simple mechanical computer. Where the bimetal response is the sensor input, the contacts are the output to actuator and the bimetal thermal behavior is of the nature of intelligence. Bit is 0 or 1 ... one digit ... 0 could be 0 volts and 1 five volts.Nibble is four bits, 4 digits, like 0010 , in hex a nibble is 0 to F.Byte is eight bits, 8 digits, like 1100 0010 , in hex 00 to FF.BCD binary coded decimal is binary code for numbers 0 to 9.Learn more by reading asciicat here. Problem driving relay through ULN2803 : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes. pH measurement : ELECTRICAL INSTRUMENTATION SIGNALS. A very important measurement in many liquid chemical processes (industrial, pharmaceutical, manufacturing, food production, etc.) is that of pH: the measurement of hydrogen ion concentration in a liquid solution. A solution with a low pH value is called an "acid," while one with a high pH is called a "caustic.
" The common pH scale extends from 0 (strong acid) to 14 (strong caustic), with 7 in the middle representing pure water (neutral): pH is defined as follows: the lower-case letter "p" in pH stands for the negative common (base ten) logarithm, while the upper-case letter "H" stands for the element hydrogen. Thus, pH is a logarithmic measurement of the number of moles of hydrogen ions (H+) per liter of solution.
Incidentally, the "p" prefix is also used with other types of chemical measurements where a logarithmic scale is desired, pCO2 (Carbon Dioxide) and pO2 (Oxygen) being two such examples. Here is an illustration of the measurement electrode's construction. Project. Circuit Simulator Applet. This is an electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage. The moving yellow dots indicate current. To turn a switch on or off, just click on it. The "Circuits" menu contains a lot of sample circuits for you to try.
Full Screen version. Directions. Standalone (offline) versions. Index of Circuit Examples. eCircuit Center. Electronic Circuits on Circuit Exchange International (CXI) Hobby projects - Simple electronic circuits. Jones on Stepping Motor Types - Мозилин фајерфокс (Mozilla Firefox) Introduction Stepping motors come in two varieties, permanent magnet and variable reluctance (there are also hybrid motors, which are indistinguishable from permanent magnet motors from the controller's point of view). Lacking a label on the motor, you can generally tell the two apart by feel when no power is applied.
Permanent magnet motors tend to "cog" as you twist the rotor with your fingers, while variable reluctance motors almost spin freely (although they may cog slightly because of residual magnetization in the rotor). You can also distinguish between the two varieties with an ohmmeter. Variable reluctance motors usually have three (sometimes four) windings, with a common return, while permanent magnet motors usually have two independent windings, with or without center taps. Center-tapped windings are used in unipolar permanent magnet motors. Stepping motors come in a wide range of angular resolution. Variable Reluctance Motors Figure 1.1 Unipolar Motors Figure 1.2 Bipolar Motors.