Circuits & Schematics: frequency meter - 8
Search for: "frequency meter"
- 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
- Nick Cornford.. the end of the DI for a Simple log-scale audio meter (Ref. 1), I promised to show how to upgrade it to work better. With these fixes, it now has near-digital ...Mar 21, 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
- Damian Bonicatto Phoenix Bonicatto.. recently purchased a new oscilloscope for home use. It’s a 250 MHz scope, but I was curious what the actual 3 dB frequency was as most scopes have a bit more upper end margin than their published rating. The signal generators ...Mar 18, 2024
- Peter Demchenko.. or bad contact). It also features a counter, which is very handy when you want to count impulses, to estimate the value of frequency or to test an interface. (This part is shown as a sketch.) The probe in Figure 1 consists of two ...Mar 7, 2024
- Stephen Woodward.. 1% “error” to result in a final, acceptably accurate 20 mV/ C demodulator output. The modulating/demodulating frequency F C generated by the A1b oscillator is deliberately set by the R4C1 time constant to be half the power ...Mar 6, 2024
- Stephen Woodward.. a cycle that begins with C2 being charged to V IN via U1a, then completes by partially discharging C2 into C3 via U1b. Pump frequency is roughly 100 kHz under control of the U1c Schmidt trigger style oscillator, so that a transfer occurs ...Feb 9, 2024
- Peter Demchenko.. output. A rather low value of inductance (0.1 1.0 mH) is sufficient. (This low value may be counter-intuitive to the low frequency of the multivibrator, which is less than 1 kHz.) The negative output voltage slowly increases with an ...Jan 31, 2024
- Arthur Edang Maria Lourdes Lacanilao-Edang.. Time_High (µs) 19.868 20.354 2.42 Time_Low (µs) 58.588 63.800 8.52 Period (µs) 78.456 84.154 7.01 Frequency (kHz) 12.746 11.883 7.01 Duty_High (%) 25.323 24.187 4.59 Figure 3. Experimental set-up with the ...Jan 26, 2024
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