9V regulated power supply circuit diagram
Create 9V regulated power supply circuit using 7809 and transistor. For circuit requires stable voltage, low noise signal, and without AC voltage leakage.
9V Power Supplies
More about 9 volts DC power supply or 9V voltage regulator
Simple transformerless power supply circuits
Learn these transformerless power supply circuits, use a capacitor instead, it smaller and lighter than transformer. There are circuits as follows.
5V, 6V, 9V, 8V, 10V, 12V, 15V, 18V, 24V-1A Regulators using 78xx series
First choice of Fixed Regulator using family IC-78xx. It is easy to use, cheap, popular for a long time.
Diy digital voltmeter panel meter 0-50V
This is Diy digital voltmeter panel meter 0-50V is 0-50V scale. Display with LED 7 segment. In cost 3$ dollar only, builds simple regulator dc power supply