Parts:R1 33 ohm D1 1N4007R2 10 kohm U1 B250C1000RR3, R8 5,6 kohm T1, T2, T3 BC548BR4, R7 100 kohm ZD 6,8 V, Zener.R5 2,7 Mohm LED1 ?ervená / red, standardR6 680 kohm LED2 zelená / green, 2 mAR9 47 kohm IC1 HEF4541C1 100 mikroF/25 V(35 V) C2 1 mikroF,clips from old batteryC3 100 pFC4 100 [...]
Build-in charger for instruments powered single Li-ion or Li-pol accumulator. If external charge voltage not conected to charger, back current from accu to charger is very small (not measured ordinary multimeters)
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