Parallel circuit
    For the voltage in a parallel circuit across each resistor Is equal to the voltage of the power supply. The voltage across each resistance which is equal to
VR1 = VR2 = VR3 = VR4 = VS = 9V
The current in a parallel circuit
    The current within a parallel circuit has multiple values. This is because there is more than one direction of current flow, so the calculation of current is done using Kerchhoff, s Current Law.

วงจรแหล่งจ่ายไฟ 1.2 -25 V ,4A(Integrated power supply 1.2 -25 V, 4A)

วงจรแหล่งจ่ายไฟ 0-30 V 2 A(Integrated power supply 0-30 V 2 A)

R1=1.2Kohm C1=4700uF/63V IC1=LM723 V1=0-30V DC
R2=680ohm C2=100nF63V MKT Q1=2N3055 TR1=220VAC/ 27V 4A
R3=0.33ohm/5W C3=4.7nF63V MKT B1=Brindge 100V 5A S1=2x10A SW
R4=15Kohm C4=220uF/63V F1=0.5A Fast Fuse 
R5=3.9Kohm P1=4K7 LOG. POT. F2=2A Slow Fuse 

วงจรแหล่งจ่ายไฟ13.8V กระแสสูง(Circuit 13.8V high current power supply)

วงจรแหล่งจ่ายไฟ1.2 -30 V1.5 A(Integrated power supply 1.2 -30 V1.5 A)

วงจรแหล่งจ่ายไฟเดียวใช้ออปแอมป์

วงจรเตือนแหล่งจ่ายไฟ(ไม่มีไฟ)

Alarm circuit power supply (no power).