Here you will find simulation files for some of the circuits in the RSGB Power Supply Handbook as well as others that will accumulate over time. They are in the popular Simetrix format. A free ‘elements’ version of Simetrix is currently available from their website. www.simetrix.com Simetrix says:

“SIMetrix/SIMPLIS Elements is our demonstration free version that can be used without license or copying restrictions, for personal, educational and business use.

Virtually all features of the full version are enabled but we do restrict the size of the circuit that can be simulated. These limits are generous enough for them to be used for real work and we are happy for our users to do so. SIMetrix/SIMPLIS Elements comes with the fully featured schematic editor and waveform viewer found in the full version. SIMetrix/SIMPLIS Elements is available for Windows® systems only”.

I also recommend you look at a web based design tool - www.easyeda.com I use this for all my schematic drawing as it is easy, flexible and can output in .pdf format for printing or further conversion to other formats. pdf files are vector graphics files which means they are small and are perfect quality whatever the scale unlike bitmap files like .png or .jpg. It will also output .svg and bitmap files but I have had less success with these formats. Easy EDA has a PCB layout and simulation feature which I haven’t tried to date.

Excel calculator for 50/60Hz transformer, rectifier and capacitor ratings - Page 17

50Hz trafo cap calcs.xlsm

Figure 1.3  Simple linear regulator dissipates 11.2W

Figure 2.1: Mains transformer and bridge rectifier

Figure 2.10: Full-wave voltage doubler

Figure 2.17: Resettable electronic ‘fuse’

Figure 3.1: Simple Zener stabiliser

Figure 3.5: A high power Zener equivalent

Figure 3.6: High power shunt stabiliser with NPN transistor

Figure 3.7: Dual output shunt stabiliser

Figure 3.8: TL-431 IC as a Zener diode

Figure 3.10: A high power Zener equivalent using a TL-431

Figure 3.12: Simple series linear regulator

Figure 3.13: Series Darlington regulator


SPICE simulation files are text files. If you click on the Figure links below you will see text. Copy this to a text editor like notepad and save it with a .WXSCH extension. It should then open with SIMETRIX (change 2.1 to .sxgph)