It is microphones circuits given the symbols CDR. If you are DIY novice like me you can nothing to do. The next I will be I will not order this format anymore.
Thank you for the 4017 IC's
fast shipping, good quality.
the IC chips arrived ahead of estimated delivery date...all items were in good shape ..correct t amount..but they were not shipped in an antistatic bag which means there is a potential for them not to work cause of static shock
Thank you very much. The chip came well packed and with rolling balls. Working capacity did not check.
Great product, original and soon it will buy another, seller certificate
