The Ultimate Nerf Vulcan Mod

Step 4 Adding the LED Round Counter

It took me about a half hour to solder together the counter from QKit. A big part of that time was trying to figure out which resistors were which, so make sure you have a guide before you start. Instead of using the microswitches from QKit, I soldered leads from their locations on the circuit board to pushbutton switches mounted on the gun. The three switches are Set, Program, and Reset. The LED comes on when you run out of ammo, which was accomplished by just hooking it to the "out" pin on the counter.

Comments

[Conrad717]

i know this post is old but could you modify a step counter to do this?

[tronicdude6]

 here is the link for it http://store.qkits.com/moreinfo.cfm/QK129 If you want it the be assembled it is an extra $10.

[barkingspider]

i did not do to good at tech so if you could make some f those and sell it on ebay that would be great( with directions)

[maxxnoodles1]

on step 4 you used a different led counter that look like this http://www.hobbyengineering.com/H1257.html

[hasben123]

is this led thing necessary?

[arduinoe]

no , but dang is it cool