I have just purchased some standard and high power project boards and because I need them to operate on 24V I followed the instructions and fitted a 78L05 regulator IC. I have used these regulators on many other projects and have always been advised to include decoupling capacitors (I usually use 0.1uF ceramic). Because there are no capacitors fitted to the PCB I checked on the Texas Instruments web site to find out whether I was wasting my time and money - on page 3 of the data sheet (www.ti.com/lit/ds/symlink/lm78l05.pdf) I found "Recommended minimum load capacitance of 0.01μF to limit high frequency noise" and considering the PIC can have problems with high frequency noise I suggest that these capacitors should be fitted. I fitted 0.1uF 1206 size ceramic capacitors alongside the legs of the IC and because I am also going to be pulse driving an inductive load I also took the precaution of fitting a 470uF, 35V electrolytic capacitor between + & G in the bottom right-hand corner of the PCB. Would technical like to comment on the lack of decoupling on the 78L05 ?