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- DIY ¿ëÇ°: Àü±â
- ºê·£µå À̸§: MiLESEEY
- ±Ù¿ø: CN (Á¤Ç°)
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PLJ-8LED is a cost-effective frequency display component for eight-digit digital tube display. It is mainly used for the display of frequency values of transceivers and other equipment, and can also be used for conventional frequency measurement. The component has the characteristics of small and exquisite, reliable performance, good visual effect and low cost. A 2.4 GHz frequency meter based on Microchip`s PIC16F648A. The frequency reference uses a temperature-compensated voltage-controlled crystal oscillator (2.5 ppm VC-TCXO). Adopt unique gate control method and precise time algorithm (non-timed interrupt method). The gate (display refresh) time is 0.01s/0.1s/1.0s optional, and the frequency value is displayed in real time. Single-ended input design, three frequency measurement channels (low channel/high channel/auto channel) are optional. Dual IF design, IF value and plus/minus mode can be preset separately. It adopts eight-digit 0.56-inch high-brightness digital tube display, and the eight-level brightness is adjustable. Invalid zero is automatically blanked, invalid frequency value display filtering is optional, and last digit blanking is optional. The circuit is simple, the structure is reasonable, the double button control, the operation is simple. All settings are automatically saved, and can be called directly after booting
1. Gate time: 0.01 seconds, 0.10 seconds, 1.0 seconds 2. Measurement channel (both high and low channels are high impedance): low channel automatic channel Automatically select high channel or low channel according to the input signal frequency, the recognition frequency is 60 MHz. If the input signal amplitude greater than 60 MHz is insufficient to automatically select the high channel, you should manually select the high channel for frequency measurement. 3. IF setting Independent dual IF design, the minimum step for IF adjustment is 100 Hz, the IF range is 0 ~ 99.9999 MHz, and the mode of plus or minus IF can be set. 4. Frequency reference Adopt 5032 package 13.000MHz temperature compensated voltage controlled crystal oscillator (VC-TCXO), frequency stability is ¡¾2.5 ppm. 5. Working voltage DC input: DC 9V~15V (with power supply reverse polarity protection) 6. Working current Maximum 160 mA (Test conditions: ¨çDC12V power supply; ¨èRed digital tube; ¨éEight-level brightness) 7. Display digits Eight-digit LED display, up to eight digits. 8. Display brightness The eight-level LED brightness is adjustable, and the factory setting is the highest brightness. On-board interface DC IN (power interface): HX2.54-2P socket RF IN (signal input): HX2.54-2P socket ICSP (Programming Interface): 2.54-6P pins size:8x2cm Material:pvc colour:Green
Package Contents: 1 x frequency counter 2 x connecting wires
Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
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