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High Sensitivity 1Hz-50MHz Frequency Meter Counter Measurement Tester Module 7V-9V 50mA DIY Kit

High Sensitivity 1Hz-50MHz Frequency Meter Counter Measurement Tester Module 7V-9V 50mA DIY Kit

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  • Full or Partial Refund , If the item is not as described Learn More >
Frequency range: 1Hz-50MHz(in fact, it can work up to 78MHz).
Four or five digits resolution(display for example, KHz, MHz, or xx.xx MHz).
Automatic range switching with different gate times.
Programmable addition or subtraction of the frequency offset.
Input impedance: 1.1M, in parallel with about 10pF.
Input sensitivity: tipcally less than 20mV RMS from 1Hz-100KHz, rising to 35mV at 20MHz and 75mV at 50MHz(150mV at 78MHz).
Current consumption: 50mA with 7 to 9V input.
Optional(configurable) power-saving mode which automatically turns the display off if the frequency didn't change significantly within 15s.

Type: Assembled Tester / DIY Kit(Optional)
Frequency Range: 1Hz-50MHz
Input Impedance: 1.1M, in parallel with about 10pF
Resolution: Max. 1Hz
Current Consumption: 50mA with 7 to 9V Input
Input Socket: BNC
Display: LED Digital Display
PCB Size: 79 * 62mm / 3.1 * 2.44in
Product Weight: 60g / 2.11oz
Package Weight: 61-65g / 2.16-2.28oz

Package List:
1 * Frequency Meter

Bill Of Materials 
*Resistors(0.25W, 1%)
8    R1-R8           1k                                                
2    R9, R15         10k                                               
1    R10             100k                                              
1    R11             1M                                                
1    R12             220                                               
1    R13             56k      * According to the different batches of C3355, the resistance may change                                       
1    R14             470      
1    C1              470n     Polypropylene                                          
1    C2              100p     Ceramic                                          
2    C3 C5           100n     Polypropylene                                             
1    C4              47u      Electrolytic                                          
2    C6, C8          10u      Electrolytic                                           
1    C7              6-40p    Variable                                          
2    C14, C15        22p      Ceramic
*Integrated Circuits
1    U1              PIC16F628A (Programmed) + 18pin IC socket                                      
1    U2              LM1117-5V  SMD
1    Q1              C945                                              
1    Q2              J310                                              
1    Q3              C3355 
6    D1-D6           1N4148                                              
1    D7              1N5819 
1    J1              16Pin SIL Socket & header                                        
1    J2              BNC Socket                                             
1    J3              DC_CZ_ZM   DC adapter socket                                        
1    SW1             AN_SW   Push button switch                                           
1    SW2             SW2X2   Push button switch                                          
1    X1              Crystal 20MHz
2    SG1-SG2         Red 2digit common cathode 7-segment display 
1    SG3             Red 1digit common cathode 7-segment display 
1    Main PCB 
1    Display PCB
2    Copper Pillar +Screw +Spring Washer 

Assembly Diagram:

Bill of Materials:

User Manual:

Customer Questions & Answers

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0 votes

Does anybody know how to activate the low order digit? It's blank right now.

  • You might have made a construction error, but more likely this is normal behavior. It should come on over 10kHz. The kit is based on an original design that is documented here: It is well worth reading.

    By Charlotte Clark on March 16, 2018


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Customer Reviews

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  • By v***l

    July 27, 2019

    The full and true deion of the item. I recommend everyone.

    Is this helpful? (0) (0)

  • By f***c

    April 14, 2018

    Good seller, five stars, thank you

    Is this helpful? (0) (0)

  • By l***o

    March 1, 2018

    Great seller. Item as described. Fast delivery

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  • By m***v

    February 17, 2018

    Good shopping. Thank You and recommend to all.

    Is this helpful? (0) (0)

  • By v***s

    December 29, 2017

    excellent seller quality kit at agreat price

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  • By s***m

    December 22, 2017

    item as described, great shipping, well packaged, 10/10 would buy from again!

    Is this helpful? (0) (0)

  • By i***n

    December 9, 2017

    Item received in good condition.

    Is this helpful? (0) (0)

  • By b***s

    December 8, 2017

    Can test all those EMF's buzzing round now... Muah Hahahahahahah!!!!

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  • By b***h

    November 29, 2017

    I received the Frequency Counter modules today/Good price/Thank you for them!

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  • By f***1

    October 22, 2017

    Exactly as described. Tested and working.

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  • By o***r

    July 2, 2017

    Excellent Transaction Works GREAT Very accurate FASTshipping was appreciated

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  • By p***a

    May 10, 2017

    Item is here. Quickly and good. Thank you.

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  • By m***l

    April 27, 2017

    On time, as described, good price = excellent!

    Is this helpful? (0) (0)

  • By k***m

    April 11, 2017


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  • By k***c

    April 7, 2017

    Arrived as described and in excellent packaging. No broken pieces.

    Is this helpful? (0) (0)

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