Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM
Manufacturers produce direct sales LED lamp bead patch lighting products 0805 white light super bright indicator light dedicated
Photocoupler
The LED is connected to the negative terminal to indicate the frequency of zero beat. Each LED level displays only the half cycle frequency of the input. When the input frequency is 1 kHz higher than the zero beat frequency, all the LEDs continue to illuminate. If the input frequency is 20Hz below the zero beat frequency, the LED will flash until the input frequency is the same as the zero beat frequency.
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