DIY guitar pedal schematics
Yes exactly. Those symbols dont represent actual components they are just a &quot;bus&quot; symbol. All it means is every symbol that matches needs an electrical connection between them. It also implies what voltage those lines should be at constantly when powered on. Usually a voltage regulator will be somewhere in the schematic if its a complete schematic.
In the Li'l Gray OD schematic +9V is the external 9 volt power source. V+ is just wired up to the power source through 100 ohm resistor so its effectively also 9 volts. Not really sure why they did that, its generally bad practice. Vr probably stands for &quot;voltage reference&quot; and basically is just sitting at around 4.5 volts. Vr is basically used to bias the opamp in the schematic which is typical for an Opamp.