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– This document describes the construction of small frequency counter with a cheap PIC microcontroller and a few seven-segment LED digits.
– Frequency range 1 Hz … 50 MHz
– Five digits resolution (display for example x.xxxx kHz, x.xxxx MHz,
or xx.xxx MHz)
– Measuring signal amplitude can be up to 30 v
– 4-40 m passive crystals can measure
– Automatic range switching with different gate times
– Optional addition or subtraction of a frequency offset (programmable)
– Very low component count: a PIC 16F628, 5 7-segment LED displays, a 20MHz crystal and a few resistors
– Optional (configurable) power-saving mode which automatically turns
– The display off if the frequency didn’t change significantly within 15seconds
– USB 5V or DC5-12V power supply can be used
Package included:
1x DIY Kits
(DIY kits, not assembled
)
1x USB cable
Red
Color: Red
SIze: 8 x 5.4cm
Suitable For:
Crystal measure (4M, 16M crystal)
Crystal measure (20M, 11.0592M crystal)
Features
This is a PIC microcontroller-based frequency meter, subtraction frequency is set with
crystal measurement functions and programmable, five digital display, easy and intuitive,
all using in-line components, the circuit is simple and easy to make
1. measurable frequency range of 1 Hz -50 MHz (1Hz-50MHz);
2. The most commonly used measure of the oscillation frequency of the crystal;
3. Five-digit precision resolution (eg 0.0050 kHz, 4.5765 MHz, 11.059 MHz);
4. Automatic range conversion, without human handover;
5. Programmable subtraction frequency setting, such as a transceiver for measuring equipment;
6. selectable power saving mode within 15 seconds if there is no significant change in the frequency automatically turn off the display;
7. You can use a common USB 5V interface, power supply, can also use an external DC power supply or 9V battery.
8. A small number of elements, all in-line components, installation is simple.
Instruction manual
1. All line elements, PCB printing press to the correct welding,
2. After welding is completed with a standard source input signal,
3. Adjust the yellow adjustable capacitor so that the display is equal to the value of the signal frequency
Packing Included
：
1 x 1Hz-50MHz frequency meter
(DIY kits, not assembled,No Case)
Frequency Counter
Specification:
Use 8 bit Microchip PIC16F648A,up to 1.1GHz
Gate time
0.64 seconds
Test sensitivity
1 MHz ~ 10 MHz: superior 60mVpp
10 MHz ~ 60 MHz: superior 60mVpp
60 MHz ~ 1.1 GHz: not tested
3) . Frequency reference
5032 package 13.000 MHz Warming voltage controlled crystal oscillator ( VC – TCXO) , frequency stability is ± 2.5 ppm
IF settings
The minimum frequency is adjustable in steps of 100 Hz, frequency range 0 ~ 999.9999 MHz, can be set to plus or minus IF mode
working voltage
DC input: DC 9V ~ 12V
working current
The backlight is enabled: ≤ 55 mA backlight disabling: ≤ 55 mA
Display
maximum of 8 digit display
physical dimensions
Length * width * height: 58mm × 32mm × 27mm
Board interface
RF INPUT ( measuring signal input ): XH2.54-2P side outlet port
ICSP INPUT (MCU programming interface ): XH2.54-6P pins
POWER INPUT ( Power Interface ): XH2.54-2P side outlet port
Package included:
1 x Frequency Counter Tester Measurement For Ham Radio
Payment Method
Shipping Policy
Returns & Refund Policy
Feedback
Payment Method
EBAY Managed Payment.
But we only
Accept
your
Ebay Address
, please Make sure it’s 100% right.
Payment must be received in 5 business days of auction closing.
Please leave note for your special request (e.g. Colors or Size) in PayPal when you pay the order.
Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched.
Shipping Policy
1. We only ship to the confirmed address provided by eBay. please make sure your ebay address is 100% matches the address you would like us to ship to. If not, please let us know before we sent you the package, or we will not be responsible for any loss. hope you could understand.
2. Orders will be processed instantly and dispatched within 1-3 business days except hoilday, so we do NOT accept any email/message note after you place orders.
3. All package need to wait 30 days,Please take care it.Less than 30 days,we can’t take a refund.
Returns & Refund Policy
All package need to
wait 30 days
(US only n
eed 7-10 days)
,
Please take care it.Less than 30 days,we can’t take a refund
.
If the item is defect when you receive it or you are not satisfied with it, please return it within 14 days for a replacement or money back. But the items must be back in factory condition. Please keep in touch with us and double check the return address before you return it.
If is item is defective in 12 months, you can return it to us. We will send you a new replacement after receiving the defective item.
Feedback
We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you keep in touch with us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns.