00283    a2200097   4500082001800000100002200018245005600040260004400096300001700140650002800157  a621.3815bBER  aBerlin, Howard M.  a555 timer applications sourcebook, with experiments  aNew DelhibBPB publicationsc1985g1985  a158p.c21cm.  aCOMPONENTS AND CIRCUITS