IMSAIGUY
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Dec 09,2021
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Arduino RF Frequency Counter with Prescaler

An Ardunino NANO and I2C OLED display make up a frequency counter. A prescaler chip extends the range to 1 GHZ.
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Published: Dec 09,2021
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DIY Electronics
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  • I tried to build the counter on a breadboard without the prescaler chip (ordered but not arrived yet), without input signal on the display appears "NAN MHz" on "INF MHz", what does it mean? Thanks

    Dec 20,20230 Comments
    Reply

  • Hi, very interesting project, is there any manual to use it? Thanks

    Dec 20,20230 Comments
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  • My suggestion is to use the 2SC9018 AM/FM IF amplifier transistor for 1100 MHz, I use it in a Cristal Frequency Meeter: It has a wide working frequency range

    Nov 19,20230 Comments
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  • pin D5 of Arduino is not defined.....how can Arduino read frequency ? I think this software will not work with SAB6456A Prescaler .

    Apr 02,20230 Comments
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  • I noticed OLED chips SH1106, SSD1306 spec seems to limit logic levels to 3.5V max. No problems without level shifting?

    Feb 05,20230 Comments
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  • Trequency range?

    Mar 11,20222 Comments
    Engineer 2022-03-16 02:48:49Reply

    he could measure about 5mhz to 200mhz but on datasheet says it can works between 70-1000 MHZ. And he didn't mention about transistor, but when i look gerber file, he use 2n2222 and as i can understand from video he use old metal package (these days some plastic 2n2222 can be fake or under standard quality, thanks to Chinese...). This transistor can reach 250mhz maximum so he can not measure 1GHZ (i think), and you must to use rf transistor about 1GHZ like BFS20. But I love this project because its so cheap for like this frequency counter.

    Engineer 2022-08-03 03:41:22Reply

    The transistor for HF pre amp is working after prescaler, the transistor working at HF frequency would sufficient. SAB6456 will working good up to 1GHz, i built DIY frequency counter with SAB6456, as daily measurement tool in my workbench, even still usable down to 1MHz.

    Reply

  • Is there a different number for the prescaler chip? Neither DigiKey nor Mouser seem to know what it is.

    Dec 29,20211 Comments
    IMSAIGUY 2021-12-29 10:02:42Reply

    it is an old part, check eBay

    Reply
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