Electronics Projects, PIC16F84 LED Display Frequency Counter Circuit article
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LED 6 digit display for rig frequency counter -Just as it may seem at frequency display of rig, and produced a dot LED-PD4435 counter, and make use of this in the future, and that the “sold out, there is no plan of the re-arrival” and. To give up this, I made a 6-digit display using the 7-segment LED.
7 segment LED 6-digit precision TCXO 12.8MHz (1ppm), PIC16F84 with 1MHz ~ 300MHz (400MHz) IF offset frequency counter. TD7104P (Prescaler ÷ 8, ÷ 1) +2 SC1906 later in the preamp, PIC 16F84A-P20 count, LED display TC4511 drivers. Left; 144.90MHz handy 200mW transmission. ANT of the counter, lead 5cm yellow alignment there. And Central; 7,649.1 kHz SG signal. Minimum digit 100Hz. Zero blank function put, unnatural 0 of top disappear. And right; at 33.1688MHz, it is not. 433.17MHz handy 200mW transmission.
PIC16F84 Frequency Counter Project
The first stage prescaler counter TD7104P (÷ 8). Single power of PIC16F84A-P20 is, 433.17 ÷ 8 = 54.14MHz. However, close to 10kHz stand, display varies the limit. Only minutes to display low 1.2kHz, you’re counting mistake. If shaped by CMOS-TTL input waveforms of PIC, and extends to 60MHz or more probably.
Source: saturn.dti.ne.jp PIC16F84 LED Display Frequency Counter Circuit schematic pic assembly source code files alternative link: pic16f84-led-display-frequency-counter-circuit.rar