Dual DC power supply rectifier using 2 terminal transformer
There are many ways to build the Dual DC power supply rectifier from a transformer that has one secondary coil.This good way as Figure 1 use two bridge diodes. The first section is normally working, others section (D1-D4) will work by AC signal from C1 and C2. To filter DC …
Multi voltage power supply circuit  using IC-78xx series
This is Multi voltage power supply circuit  as electrical circuit to supply DC power positive and negative. It also has multiple power levels as well. The equipment it easy to buy and affordable. Operation of this circuit, when T1 was to convert the AC voltage from 220 volts down to …