Fred Bloggs wrote:
[snip]

This one will make the output tempco essentially that of the zener which
is not bad for the 5.1V's. Ripple rejection is lacking due to the low
overhead -at 14dB, but your 6V is regulated anyway.

Please view in a fixed-width font such as Courier.


6V ---+--------+----------+-------------+
| | | |
| / / |
| 22 51 |
| / / |
| \ \ c
| | | |/
| +----------|-----------| TIP31
| | | |\
| | | e----+-- 5V
| c | |
| \| | pnp |
| npn |--+-----|-------- c e---+
| /| | | \ / |
| e | | ---- |
=== | | | 1N4148 | |
| | | +----||----+ |
| | | | | |
| | | | | |
| | / _/ / ===
| | 1K /^ 5.1v 1.2K 1000U
| | / - / |
| | \ | \ |
| | | | | |
GND--+--------+----+-----+-----------+------+-- GND