Question about Zenith Z56DC1D 56" Television
I have a homemade 12vdc yard light.I bot a transformer,120 vac in, 12 vdc out. why is this insufficient to properly light the two 1156 (auto backup lamps) that I have had in this yard light for 20 years? (Orig xformer burned up)
Hi and welcome to FixYa,
Offhand, other than the posted voltage (12VDC OUT), the output current is equally important. The current is half responsible (aside from the voltage) in lighting up the bulbs to its rated brightness (wattage). If for example, each bulb is rated @ 12V / 5W, then it would require the equivalent of 2 X 0.5 Amps (500mAh) or 1 Amp. The higher the wattage, the higher the current required. Incidentally, if the wires are small and long (bulb far from transformer / power supply), then the output voltage may need to be higher a bit to compensate.
Additionally, checks (if have not been done) should be made on the wires, connectors, sockets for possible loose, corroded, grounded or anything out of the ordinary.
Good luck and thank you for asking FixYa.
Posted on Nov 16, 2009
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Posted on Jan 02, 2017
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