This is a collection, put together to give novice students an insight, on how to arrange the components and how it mayst look at the end. If appropriate, some comments if something is especially good/bad/ugly. Updated occasionally - if a new 'model' runs in front of the gun :-)

This is a straightforward "classic" design. ±15V, approx. 120 mA. Nothing special and therefore no surprises to be expected ...

This is a small kit to get familiar with the MC34063. Input: 5...40 V, Output : 3...12 V, maximum 650 mA. No heatsink is necessary ! More information available at : Pollin

This is a 100 x 160 mm card, using twice the L200 voltage regulator with current limit capability. Notice the strictly symmetric design which prevents layout/assembly errors. The voltage regulator between the transformer and the heatsink is almost inaccessible.

We have no schematics. All devices are shown for educational purposes. Most of them have been found at the electronic waste. After a short autopsy/photo shooting they were send back to the happy hunting grounds.

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