

| Subject: | Re: Time Delay LED Lighting Circuit |
| From: | David Beierl |
| Date: | Sat, 5 Aug 2017 03:11:00 -0400 |
BC547 is a general purpose half watt NPN switcher/amplifier. Pinout is CBE looking at the flat side. Haven't found a 1N418, are you sure of the number? d On Sat, Aug 5, 2017 at 3:02 AM, Dick Wong <sailingfc@dslextreme.com> wrote: > David, > > Both diodes are 1N418. Both transistors are BC547. The cap is a 47uf 16V. > > HTH. > > -Dick- > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of David Beierl > Sent: Friday, August 4, 2017 11:34 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Time Delay LED Lighting Circuit > > That is a very clever circuit, and cleverly laid out as well. > > BD 433 is a 22 volt GP NPN transistor, E C B left to right on top surface. > It does the switching. Its base is connected to presumably the emitter of > the next transistor (if it's an NPN type as well). > > It would be really nice to know what's written on the fronts of those two > transistors, also the complete legend on the diodes. > > Yrs, > d > > On Sat, Aug 5, 2017 at 1:32 AM, Alistair Bell <albell@shaw.ca> wrote: > > > Dick, > > > > That looks nice and compact, david or others, what's going on there > > beside the obvious? > > >
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