IMSAIGUY
UNITED STATES OF AMERICA • + Follow
Dec 09,2021
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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

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

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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

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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 .

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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?

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  • Trequency range?

    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.

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

    IMSAIGUY 2021-12-29 10:02:42Reply

    it is an old part, check eBay

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