Hi all.
Originally I was going to send this link to
David, ( thought your kids might use it) but others may
benefit.
Its an interactive educational program covering
various subjects that you can download for home use
for free. I got it for the electronics which I'm
currently (pun) trying to learn.
You build a circuit by clicking & dragging
icons. You can drag various test equipment across the circuit
to get readings & components blow up if you get
it wrong.
There is a digital section with loads of different
integrated circuits to play with.
The license needs renewing after a
year.
Alan
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