Re: 74HC4060 Oscillator/Counter Frequeny Problem
Hi,
Show a photo of your circuit, where we can see all your connections.
There are many manufacturers that produce HC4060. Please tell us the exact part name and manufacturer.
It would be very kind of you to upload (a link to) the datasheet of the your manufacturer.
73.5kHz and 78kHz are off by about 6%. Many capacitors have a tolerance of +/-20%, or +/-10% .... thus 78kHz may be within tolerance.
--> give use exact type and manufacturer of all your Rs and Cs. ... and datasheets.
Also the HC4060 as well as the resistors and the power supply have tolerance.
The wiring causes additional impedances that will shift the frequency, thus I asked for a photo.
Even the connection to your frequency meter will have influence to the frequency.
And: don't let (unused) inputs floating.
--> It's not surprising to get 78kHz.
Klaus