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.
It is a 1MHz to 300MHz (400MHz) IF offset frequency counter using 7 segment LED 6 digits, high accuracy TCXO 12.8MHz (1ppm) and PIC16F84. Left side: 144.90MHz useful 200mW transmission. The ANT on the bench is a 5 cm ready-made yellow lead wire. Center: SG signal 7649.1 kHz. The minimum digit is 100Hz. There is also a zero-space function, and the top unnatural 0 is lost.
Right side; Not at 33.1688MHz. 433.17MHz useful 200mW transmission. Counter first stage prescaler TD7104P (÷8). The only power of PIC16F84A-P20 is 433.17÷8=54.14MHz. However, it is close to the limit and the display changes in the 10kHz range. The amount displayed 1.2 kHz lower is considered incorrect. If the PIC’s input waveform is shaped by CMOS-TTL, it will likely go up to 60MHz or more.
It is possible to display the frequency of your own radio with the IF frequency offset function. Select lower, upper or reverse heterodyne with DIP-SW. It measures 84mm wide x 36mm high x 25mm deep using a janome board and is for rig panel surface mounting with 4 M3 screws. TD7104P (prescaler ÷ 8, ÷ 1) + 2SC1906 is preamplifier, then PIC16F84A-P20 counts and LED driver TC4511 is displayed. LED is common cathode. 6 C-551SRs.
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:
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Published: 2009/01/18 Tags: microchip projects, microcontroller projects, pic16f84 projects
Sony Philips RC5 IR Remote Decoder Circuit PIC16F84A
Sony and Philips RC5 protocol that works with the remote control of the code to learn a useful circuit on the circuit porta.3 pin 1 if sony 0 no RC5 philips decode the received 16-bit data of the 8-bit device code other 8-bit the read key is the value of various control with tried circuit is fine works beautifully. Codes were written with protons. Proton ide ready to read IR commands are used.