When I'm designing stuff, or just playing around, I usually use boards like this......
![](https://i.imgur.com/GHnGJJi.jpg)
I have MANY of them, for types/ranges of capacitors, resistors, inductors etc., for temp
substituting in-circuit, before deciding on the ones to use!!
![Phew :phew:](https://www.eevblog.com/forum/Smileys/default/phew.gif.pagespeed.ce.n2uLOVFYMP.gif)
P.S. Re: Strange value resistors. Low/Medium grade Security systems I've worked on
require 'special' value resistors to be detected "End Of Line" with the various sensors.
You can't but them normally, and often need fairly complex series/parallel concoctions
to get close to the required values, if making your own. Stupidly, most people put them
in series at the 'Panel', instead of the E.O.L. , to stop people bridging them in the Field!!
Higher security systems, as in banks & prisons, had an 'electronic-module' epoxy molded
into the field sensor/switch, and a custom singly matching 'chip' in the alarm panel !!
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
(ALL matching modules/chips for each circuit is unique in the World)