This modification will allow you to control the motor speed of a Nerf Stryfe and thereby the impact force of the Nerf darts. The Stryfe is my favourite Nerf gun, but like all electronic blasters in its stock form it is kind of weak. There are multiple instruction on the web on how to perform a voltage mod, but to change the speed you would always have to use different batteries. You might ask why would you want it to run on a lower speed? Well if you have ever heard how loud it is after the voltage mod the question answers itself. Also, to see your friends faces, when you crank up the speed is priceless due to the noise the gun is making. As an added feature, the speed of the motors is indicated by nine LEDs on the side of the blaster.
Btw. if the only thing you would like to do is to run the Stryfe on 14.8 volts, just take a look at step 2.
Step 1: Stuff you need
5 mm thick ply wood (take a look at step 5)
Transparent red plastic
Optional: paint, plastic primer, modelling clay, filler
Hot glue, or sugru
7805 voltage regulator
2 x 22pF, 1 x 47 and 1 x 100 uF capacitor
16 MHz quartz
TIP120 npn darlington transistor
NPN transistor BC547
Potentiometer 0-80 kOhm
9 x 220 Ohm resistors, 2 x 10 kOhm resistors, 1 x 1 MOhm reistor