I have this IC, HCF4027B - to datasheet
I find out there is a newer version of it, an equivalence probably, or its predecessor CD4027. Both do the same thing and have the same pins functions.
Building this circuit, i realize my IC is doing something strange.
When I activate with +5V on pin 3, - if i keep the wire, or button or contact long enough, like 500ms, it activates in ON state, and the led stays on. If I keep the wire very short period, like 10ms, so very fast contact, it commutes to OFF state.
If im trying to switch normally, same time period for bots on/off, it will stay mostly on, or randomly off.
The cycle between on and off, is the normal one, i only have problems with how much time i make the contact.
Maybe the IC is damaged? or its normal behaviour?
I tried with a simple wire, with a switch, and an LDR. Ldr is more sensitive and it amplify this behavior and i can clearly see this big diference when moving hand to switch.
What do you recommend?
Probably i should make the scheme im using now, with all the values , since im experimenting and i dance around the original circuit values from the link i post here ?
But basically, I want a clean OFF and a clean ON, and not as analog as it is now, dependent for delays in commutations, to do its proper job.
Thank you very much.
I find out there is a newer version of it, an equivalence probably, or its predecessor CD4027. Both do the same thing and have the same pins functions.
Building this circuit, i realize my IC is doing something strange.
When I activate with +5V on pin 3, - if i keep the wire, or button or contact long enough, like 500ms, it activates in ON state, and the led stays on. If I keep the wire very short period, like 10ms, so very fast contact, it commutes to OFF state.
If im trying to switch normally, same time period for bots on/off, it will stay mostly on, or randomly off.
The cycle between on and off, is the normal one, i only have problems with how much time i make the contact.
Maybe the IC is damaged? or its normal behaviour?
I tried with a simple wire, with a switch, and an LDR. Ldr is more sensitive and it amplify this behavior and i can clearly see this big diference when moving hand to switch.
What do you recommend?
Probably i should make the scheme im using now, with all the values , since im experimenting and i dance around the original circuit values from the link i post here ?
But basically, I want a clean OFF and a clean ON, and not as analog as it is now, dependent for delays in commutations, to do its proper job.
Thank you very much.
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