FREE Christmas
Supplement
Twinkling Star - Christmas Bubble - Festive Fader - PICtogram
Our free supplement of extra projects -- LED twinklers and lamp flashers
-- is sure to be a big hit at every Christmas party!
In the January
2001 issue (P. 31), corrections were made as follows: Page 8 circuit diagram,
Fig. 3. The unconnected lead from the mains input "live" should
run horizontally across the circuit tolink up with the unconnected lead
running down to thejunction of R8/ MT2. Thep.c.b. is correct.
Also, thevalues of capacitors C3 and C6 on the circuit diagram shouldbe
1µF multi-layer ceramic. The parts list is correct. Although not
listed in their catalogue, we understood that Farnell (www.farnell.com) stock
the transformer Dagnell D3607 3VA p.c.b. type (# 330-3809).
The Schmitt Trigger (2)
Continuing our in-depth designer's guide at the most versatile trigger,
detection and shaping circuit. This month we look at op.amp and comparator
circuits.
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