parts questions cd4016 and humungo sized capacitors

Clack · Last edited by Clack on Tue Aug 16, 2005 4:29 am; edited 1 time in total

hey just a quick question , i looked at datasheets but i wasnt 100% sure, is CD40106 a certain type of 40106? or would any 4000 series 40106 do?

v-un-v · Posted: Mon Aug 08, 2005 2:43 pm Post subject:

any 40106 will do (CMOS). they're just different brand names.

Clack · Posted: Mon Aug 08, 2005 2:55 pm Post subject:

ah good, thanks it seems like a special one as he kept the cd in on the parts list

Clack · Posted: Tue Aug 16, 2005 4:26 am Post subject:

hi erm another stupid question, but er i can only find 1uf non-Electrolytic capacitors that are masive in physical size and have " Rated voltage " 500v is this the max voltage? would it not work in a low power/volt circuit? i dont mind having big fat capacitors poking out they arnt to expensive either.

Macaba · Joined: Jul 13, 2005 Posts: 160 Location: UK

Where does it say they have to be non-electrolytic?

If you must really use the big non-electrolytic 1uf cap, then one rated at 500v will work, but is un-neccessarily large.

You can get non-polarised electrolytic caps, which would be ideal.

Clack · Posted: Tue Aug 16, 2005 5:13 am Post subject:

ach i always get that mixed up " stupid amature! ", ta ill see if there are any non polarised ones

Sprak · Joined: Oct 19, 2005 Posts: 15 Location: Stockholm, Sweden

Concerning the CD40106... I have a CD40106BE that seems to be causing me trouble. However, it's been tricky finding datasheets that somehow confirm my suspicions that the pinout is different from other (plain?) CD40106's, even though their function is the same.
Has anyone run into this before?

blue hell · Posted: Wed Feb 15, 2006 12:14 pm Post subject:

The BE suffix means it's buffered, whether that's a problem for your circuit I don't know. For a pure digital circuit it shouldn't matter, when used in semi analog mode (as an amplifier f.i.) it might matter.

The pinout should be the same though.

Sprak · Joined: Oct 19, 2005 Posts: 15 Location: Stockholm, Sweden

What lead me to believe this variant was a problem is a short that refuses to go away. As soon as a connect the 9V battery for the + side of the battery chain the voltage from it drops hard and fast (the battery on the - side doesn't behave like this when connected). I've searched the pcb and connectors twice for shorts and found nada. However, when I tried removing the CD40106BE the battery drain didn't appear and things seemed peachy overall.
But who knows, it could be as simple as my 40106 is busted.

blue hell · Posted: Thu Feb 16, 2006 10:26 am Post subject:

Sprak · Joined: Oct 19, 2005 Posts: 15 Location: Stockholm, Sweden

I turned out the problem was a busted 40106. (posting about it in case someone else runs into a similar problem)

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