Circuits & Schematics: frequency meter - 10
Search for: "frequency meter"
- .. circuit requires a 3 to 5 V battery. Two AAA cells can power it for approximately 15 days. If you need a high modulating frequency, then you can reduce R 1 to 1 MΩ, changing the modulating signal to the range of 10 to 20 kHz. ...17-01-2023
- .. work well at low frequencies and worsens the loading problem. Finally, the circuit's dc operating point varies with frequency. The circuit in Figure 1 elegantly overcomes these limitations. The original circuit uses three of six ...09-01-2023
- .. a DVM at TP 2 to read out the proximity in inches. R 3 adds hysteresis to ensure a well-defined transition. To ensure frequency stability for the high-speed dual comparator in Figure 1, the copper-clad pc board should have a ground ...29-12-2022
- .. a calibration stand so in an actual setup you probably want to put a good, calibrated ammeter, like a 5½ digit lab meter, in line with the calibration stand. Also, if you don’t have a constant current power supply, just use ...27-12-2022
- .. astable multivibrator provides a low-cost way to drive an LED from a single cell. The astable circuit oscillates at a frequency of 1/T O , where T O = T L + T H with T L ≈ 0.76R 2 •C 2 and T H ≈ 0.76R 1 •C 1 ...23-12-2022
- .. A lookup table (LUT) stores linearity correction data for several types of thermocouples (K, J, N, R, S, T, E, and B). Line frequency filtering of 50 Hz and 60 Hz is included, as well as thermocouple fault detection. An SPI-compatible ...23-12-2022
- .. control scheme also assists in regulating the auxiliary outputs. This IC’s current-limited, minimum-off-time, pulse-frequency modulation constantly adapts its switching frequency to the net load current; the frequency increases ...21-12-2022
- .. signal to represent a logic-high state. The circuit in Figure 2 performs efficiently if the system can generate a frequency greater than 1 kHz to excite the pulse transformer. Many electronic systems that use an output ...19-12-2022
- .. stepped down by a resistive divider and buffered by voltage followers. IC 2A implements a square-wave oscillator whose frequency is approximately equal to 1/RC in this case, 10 kHz. You program the autoreferencing circuit using the ...08-12-2022
- .. basically the same, but this one can drive a 2.3-nF capacitive load at frequencies as high as 500 kHz. Figure 1. This high-frequency, high-voltage amplifier can drive the capacitive load from a PVDF (polyvinylidene-fluoride) ...02-12-2022
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