From 32954a7ed27a28ee4bb2bb5d314bceb5f77de872 Mon Sep 17 00:00:00 2001 From: Mikhail Grushinskiy Date: Fri, 29 Nov 2024 13:18:52 -0500 Subject: [PATCH] Update README.md --- bbn_m5atomS3_lite_alternator_freq_to_RPM/README.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/bbn_m5atomS3_lite_alternator_freq_to_RPM/README.md b/bbn_m5atomS3_lite_alternator_freq_to_RPM/README.md index 765c409..7a721be 100644 --- a/bbn_m5atomS3_lite_alternator_freq_to_RPM/README.md +++ b/bbn_m5atomS3_lite_alternator_freq_to_RPM/README.md @@ -7,3 +7,7 @@ You can find them searching Internet for: 817 optocoupler isolation module +The circuit of the boars looks like this: + + +![PC817 optocoupler isolation module board](img/PC817_optocoupler_circuit.png)