The Pvc Flashlight




This is it the amazing flashlight made frome scrap parts got all the parts from the shack and home depot. Its fancy switch and everything

Step 1: Gather Parts

i got all my parts from the home depot and the shack

radio shack:
A 3 10mm red leds
B 1 push on push off switch
C 3 9v battey clips
D 3 9v batteries
E some wire
F a 560 ohm resistor

home depot:
a:1 pvc pipe atleast 8 inches long
b:1 male threded connecter
c:1 1" to 2" expander
d:1 female threaded end

! hot glue gun
@ soddering iron
# sodder
$ drill
% hack saw

Step 2: Fit the Thing

thake the pipe you got and cut it down to about 7 1/2" or what feels good

drill a hole in it about 3/4 of the way up make sure the button will fit

put the parts on the ends this will be what the flash light will look like DONT GLUE ANYTHING IN PLACE YET!!!

Step 3: Wire It Up

ad longer wires to the ends of the leds for mobillity and to keep it from shorting

wire the 9v batts togather like in the pic with:
resistor/+/batt /-/+/batt/-/+/batt/- (ps i did change this before thanx to las veguses comment)

the tape them like in the pic so that they will fit in the pipe

Step 4: The Head of the Beast

take a pice of card bard or somthing like it as long as it is thin and cut it to fit in the top of the expander then poke 3 holes for the leds make sure the wont fall thru

then make the cords all nice and easy to tell wich is + and wich is - the wire like so

Step 5: Almost There

first sodder the negitve lead of the batts to the negitive leads on the leds then

take the switch and add wires to the ends put it thru the hole and poke the wires out thru the top where you will atatch the lights
sodder one side to resistor and the other to the positve end of the leds

Step 6: Now That the Circitry Is Done...

glue the top to the middle and the middle to the bottom but not the base to the bottom
glue the diffuser to the top (if u have one)and the switch to the middle like in the pic wrap up the handleing part with some electric tape and u have your finished product
not bad for some 7th grader



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    65 Discussions


    4 years ago on Introduction

    Nice little project flashlight. This is something I might be able to do for my stem class.


    11 years ago on Introduction

    i was thinking of constructing something similar to this, but with many more leds, about 10 to 15. could i run them all in series off one nine volt battery? that was what i was thinking, but i have no clue what type of resistor to use or if i need more power.

    4 replies

    Reply 5 years ago on Introduction

    Search, Google or otherwise, for "led calc" or "led array calc". There are a number of good web-based calculators to help you figure out the right size resistor for any number of LEDs with any current and voltage requirements, hooked up to any DC source. Each LED needs its own resistor (bad idea to use one resistor for all LEDs) so if you calculate one resistor for one LED, you can safely use the same resistor size for all the other LEDs as well.

    Looking at your specific problem, there's no limit, really, to how many LEDs you can hook up to one battery. The only consideration is how long you want them to be lit, which is controlled by the Amp-hours (Ah) of a battery and the Amps used by each LED. One type of high-intensity LED I have in my parts case needs 25mA (milliamps). A 9v battery typically has 550 mAh (milliamp-hours). So hooking up 15 LEDs at 25mA each requires 375 mAh, which means this LED flashlight will run for about one and a half hours (550 mAh divided by 375 mA = 1.47) with that setup. Each of my 15 25mA LEDs will need its own 220 ohm resistor.


    Reply 9 years ago on Introduction

    I made a 9 volt battery flashlight with 12 leds. you'll need to make sets of three in series to limit each led's current to 3 volts, and then after that just wire those sets in parallel until you have however many you want.


    Reply 10 years ago on Introduction

    If you know the voltage of your LEDs, it's easy to figure out how to set it up. I used one 9v and LEDs of 1.5v each. 9x1.5 is 6, so I put 6 in a series and connected it to the 9v (each LED acts as a resistor and removes 1.5v from the circut). If you want more LEDs in the flashlight, make more sets of 6 or whatever and connect the sets in parallel. If you dont know the proper voltage and want to avoid resistors, temporarily hook up all of your LEDs in a series to a 9v and remove one at a time until they are at maximum performance.


    Reply 5 years ago on Introduction

    Paint it bright orange with a neon green stripe or two. Terrorists usually don't bother with painting their pipe bombs, and certainly not in such "LOOK AT MEEEEE!!!" colors. Plus you want to be able to see it easily when you are hunting for it in the dark.


    5 years ago on Introduction

    With a second 1" to 2" expander, you could recess the switch in the base of the flashlight. The second expander would be mounted around the cap on the end, 2" end surrounding the cap, with the switch inside the 1" end of the second expander. This would make the flashlight not have that pushbutton switch sticking out halfway down the length.


    6 years ago on Step 3

    how long should the long wires be


    11 years ago on Introduction

    yea im hoping to start making the pvc flashlight v2 that is pretty much what you have just described soon just havent had time but if you were intesed in starting it yourself you would need to get the voltage of all the leds add them up see how much they equal and i always just round up to the closest battery or set of batteries then calculate the ohms for the ristor with this 8==> so chek it out but i think ill post the v2 soon so chek back in a month or so

    3 replies

    Reply 11 years ago on Introduction

    which do you think would be better, a 3 watt Luxeon high dome emitter or 10-15 LEDs?


    Reply 11 years ago on Introduction

    well honestly im cheap so i would go with the LEDs but if you had the power for the bulb i think that would be brighter but not neccicerily more efficient i would compare the specs if i were you it really depends if you'd like to send me a message with the specs go right ahead


    Reply 8 years ago on Introduction

    depeneds on the voltage you are feeding it, it also depends on your led, different leds have different forward recommended voltages so depend on your led when determine the resistor.