Ioannis
- 14th February 2026, 15:13
Long time ago, Microchip had that AN592 to show how a PIC16C54 can measure up to 50MHz frequencies, which was indeed very impressive.
About 6 years ago this Instructable by user WilkoL did a High resolution frequency counter based on the Reciprocal method, so he can measure frequencies of the Hz region at 1 sec gate with 7 digits precision!
https://www.instructables.com/High-Resolution-Frequency-Counter/
Later he made another one with variable gate https://www.instructables.com/Frequency-Counter-With-Variable-Gate-Time/
The above were not PIC based of course.
But as my freq. counter is not behaving lately I thought I may try to make one based on the above.
Then there is also this module https://www.aliexpress.com/item/1005007442287352.html?spm=a2g0o.detail.pcDetailTop MoreOtherSeller.4.15cbKUGoKUGoeo&gps-id=pcDetailTopMoreOtherSeller&scm=1007.40050.354490.0&scm_id=1007.40050.354490.0&scm-url=1007.40050.354490.0&pvid=8d97dc7e-e69e-45fe-ac8d-000482476798&_t=gps-id:pcDetailTopMoreOtherSeller,scm-url:1007.40050.354490.0,pvid:8d97dc7e-e69e-45fe-ac8d-000482476798,tpp_buckets:668%232846%238110%231995&pdp_ext_f=%7B"order"%3A"258"%2C"eval"%3A"1"%2C"sceneId"%3A"30050"%2C"fromPage"%3A"recommend"%7D&pdp_npi=6%40dis%21EUR%2110.72%2110.26%21%21%2112.4 2%2111.89%21%402103891017711981987927269e43e7%2112 000040770522353%21rec%21GR%21101297834%21X%211%210 %21n_tag%3A-29919%3Bd%3A1c972c65%3Bm03_new_user%3A-29895&utparam-url=scene%3ApcDetailTopMoreOtherSeller%7Cquery_fro m%3A%7Cx_object_id%3A1005007442287352%7C_p_origin_ prod%3A at a price you can't beat...!
What is your preferred route if you'd do something similar?
Ioannis
About 6 years ago this Instructable by user WilkoL did a High resolution frequency counter based on the Reciprocal method, so he can measure frequencies of the Hz region at 1 sec gate with 7 digits precision!
https://www.instructables.com/High-Resolution-Frequency-Counter/
Later he made another one with variable gate https://www.instructables.com/Frequency-Counter-With-Variable-Gate-Time/
The above were not PIC based of course.
But as my freq. counter is not behaving lately I thought I may try to make one based on the above.
Then there is also this module https://www.aliexpress.com/item/1005007442287352.html?spm=a2g0o.detail.pcDetailTop MoreOtherSeller.4.15cbKUGoKUGoeo&gps-id=pcDetailTopMoreOtherSeller&scm=1007.40050.354490.0&scm_id=1007.40050.354490.0&scm-url=1007.40050.354490.0&pvid=8d97dc7e-e69e-45fe-ac8d-000482476798&_t=gps-id:pcDetailTopMoreOtherSeller,scm-url:1007.40050.354490.0,pvid:8d97dc7e-e69e-45fe-ac8d-000482476798,tpp_buckets:668%232846%238110%231995&pdp_ext_f=%7B"order"%3A"258"%2C"eval"%3A"1"%2C"sceneId"%3A"30050"%2C"fromPage"%3A"recommend"%7D&pdp_npi=6%40dis%21EUR%2110.72%2110.26%21%21%2112.4 2%2111.89%21%402103891017711981987927269e43e7%2112 000040770522353%21rec%21GR%21101297834%21X%211%210 %21n_tag%3A-29919%3Bd%3A1c972c65%3Bm03_new_user%3A-29895&utparam-url=scene%3ApcDetailTopMoreOtherSeller%7Cquery_fro m%3A%7Cx_object_id%3A1005007442287352%7C_p_origin_ prod%3A at a price you can't beat...!
What is your preferred route if you'd do something similar?
Ioannis