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1. LF: Re: off topics: Inverter 12V/-12V wanted from DK 8 ND (score: 1): Author: "Dave Brown" <[email protected]>; Date: Fri, 27 May 2005 09:15:59 +1200; There used to be a low frequency arrangement using a 555 timer as a DC-DC converter for charging NICds from a 12 volt supply-was common in the amateur literature maybe 20 years ago. Might be the sort; /rsgb_lf_group-archives/html/rsgb_lf_group/2005-05/msg00178.html (11,391 bytes)
2. LF: RE: off topics: Inverter 12V/-12V wanted from DK 8 ND (score: 1): Author: "james moritz" <[email protected]>; Date: Thu, 26 May 2005 22:17:00 +0100; Dear Hans-Albrecht, LF group, You could bypass the problem altogether by using a single-supply op amp, e.g. TLC271 or almost any other CMOS op-amp (but these are usually limited to 15V total supply v; /rsgb_lf_group-archives/html/rsgb_lf_group/2005-05/msg00179.html (10,305 bytes)

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