Way back when, I wrote

> Sent: Monday, April 02, 2012 4:35 PM
> Subject: Re: [EE]:: Ceiling fan speed control using simple
> TRIAC phase control.


> The latest Silicon Chip has a single / 3-phase induction motor
> controller using the STGIPS20K60 and a dsPIC
>=20
> http://www.st.com/internet/analog/product/243135.jsp

I eagerly awaited the kits. And waited. And waited

As of today, 6 months on, the latest news is

- Hi Joe,
- There were few issues with the first batch so they are being
- reviewed, I have no set date for the new units
- I am unsure about what the issues were. All I got told for the guys
- at Head Office was it would not be sent to stores due to a minor fault.
- I have been told however that the new batch is being tested by
- Silicon Chip in Aus at this very moment.

So, having now a distinctly uneasy feeling about this SC project,
I'm looking at an alternative. Maybe it'll be temporary, maybe not
if something like a dimmer circuit works. The SC project does have
the advantage of being speed control via variable mains frequency
and that's why I'd prefer it, particularly for the slower speed range,
despite the initial cost. But for now I really need/want to be doing
'something'

A quick Google brought this up

http://www.circuitstoday.com/modified-lamp-dimmer-circuit

My immediate need is for a 230V 120W synchronous scrollsaw
motor. Is this a reasonable circuit to try out ? I have all the parts
to hand

TIA

Joe
--=20
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