Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
2-phase doorbell transformer parlor trick
So grab a single-phase 120v/24v doorbell transformer, a couple 12v lightbulbs, some hookup wire and a dual-trace scope.
Apply 120v single phase to the transformer primary and connect the light bulbs in series to the transformer secondary as shown below: ( Transformer L1 ) ----------- ( lightbulb ) ---------- ( traitor's magic junction ) ---------- ( lightbulb ) ----------- ( Transformer L2 ) You should see the bulbs light up. Next, connect a dual trace oscilloscope to the lighting circuit as follows: - Connect the two scope trace common leads to ( traitor's magic junction ) between the lightbulbs. - Connect scope trace Lead 1 to ( Transformer L1 ) - Connect scope trace Lead 2 to ( Transformer L2 ) Your scope will now display 180° 2-phase 24v output coming from a single phase transformer. [Hugh Jorgan takes a bow] |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
3-phase used for 1-phase (split-phase) power | Home Repair | |||
Doorbell transformer wattage | Home Repair | |||
Old Parlor Table - Old Finish | Woodworking | |||
old parlor table and chairs legit, topical post! | Woodworking | |||
Molly Brown parlor table plans | Woodworking |