Circuits & Schematics: frequency - 7
Search for: "frequency"
Search results: 779 Output: 61-70
- Diego Puyal Pilar Molina.. a system's specifications call for a lowpass filter with a steep frequency-cutoff characteristic, an engineer can opt for a “brick-wall”- filter design that features ...Jun 17, 2024
- Antonio Muñoz Arturo Mediano.. turns on the upper LED. If both LEDs must appear to be on, your program can cycle the port pin between one and zero with a frequency greater than 50 Hz. To calculate the value of the resistor, the following formulas apply for Figure 1a: ...Jun 11, 2024
- Stephen Woodward.. consisting of U2b driven by positive feedback. From U2c through C1 and negative feedback through R1, generating: Pump frequency will vary somewhat with component tolerance and loading of the 10 V outputs, but since the clock ...May 23, 2024
- Steve Franks.. drive waveform, leaving the P-channel FET in its linear operating region for an extended period and thus limiting switching frequency and causing significant power losses in the cascaded FETs. Figure 2. An N-channel FET driver (a) has ...May 23, 2024
- Hesam Moshiri.. fuse and R1 is the 7D741 varistor to absorb high voltage transients. C2 is a 100 nF X2 rated capacitor to reduce the high-frequency noise and T1 is a common mode choke. BR1 is the Vishay MB6M bridge rectifier and C3 is a 22 ...May 7, 2024
- Hesam Moshiri.. 1. Mains sine wave (Green arrows show the zero crossing points). The Figure 1 shows the mains sinusoidal wave with the frequency of 50 Hz (sometimes 60 Hz). To build a dimmer, the zero crossing points (the points where the wave ...Apr 26, 2024
- Anthony Smith.. of noise filtering and has negligible effect on the switching of Q 3 . You may need C 1 and R 5 to roll off Q 2 ’s frequency response to avoid the possibility of high-frequency oscillation. The transistor types are not critical; ...Apr 23, 2024
- Hesam Moshiri.. determines the transmission power which of course affects the detection range. The potentiometer R5 adjust the frequency. If you have an oscilloscope, you should be able to see a signal like the Figure 4 at the U1, pin-3 ...Apr 17, 2024
- Stephen Woodward.. works. The R1C1 time constant couples the V IN /ppv square wave found at U1pin14 to U1pin9, creating an F PUMP oscillator frequency of (approximately): During the F PUMP negative half-cycle (U1pin4 = 0), the upper (U1pin14) end of C2 ...Mar 27, 2024
- Alfredo Saab Steve Logan.. the large-valued filter capacitors you usually find in a switching regulator, because there is no need to smooth out high-frequency ripple in the LED current. Common to all circuits is the option of adding a dimming capability by ...Mar 20, 2024
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