How to turn off many LEDs controlled by 74HC595 with a transitor

[LarryD]

• Not sure what you have in mind for your final hardware package.
  If you are planning to solder up the circuit, these posts might help.

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Circuit Prototyping Construction A new user eventually asks: “Now that I have made my circuit work on a solderless breadboard, how do I make it permanent.” The following images show a technique I use to make a one time, Point-to-Point circuit on a prototyping PCB. This is a valid way of wiring up a project circuit board; when you need to make several such circuits, it might be time to get PCBs made. If others have additional suggestions they can pass on, please do. The first thing we need…

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Prototyping Wire Preparation With reference to the previous Post #1352. See Post #1356 also Below is a summary how I prepare wires used in wiring a prototyping PCB. [A] [B] [C] This should read: We Now Have 3/8" on both Sides of the Insulation [D] [E] This should read: 16 strand. [F] [G] [H]

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Magnet / Enamel Prototyping Wire Further to Post #1352 and #1353 In some situations, we might want to use Enamel Insulated Wire to make connections on our prototyping PCB. See the images below showing the wiring processes. You can buy this wire from many places on the internet, one store I use is: Suggest you use: for signal connections 0.19mm Solderable Enamel (Insulated) wire (100mA). for bus wire 0.25mm tinned copper (228mA). See the short YouTube video showing the removal of the en…