Our third up to date DIY venture from the Widespread Science digital archives entails luring after which trapping bugs which have managed to search out their means inside your own home–a very common downside. Comply with alongside as we replace a circa-1971 entice for as we speak’s smarter, extra clever bugs for lower than $20.
Comply with alongside step-by-step within the gallery.
Authentic taken from the August, 1971 situation.
This vacuum-style bug zapper venture’s design was first launched within the August 1971 situation of Widespread Science Journal.
100% Reasonably priced Supplies
Right here’s what you’ll want. (Low cost and simple PopSci DIY initiatives with step-by-step directions: Priceless.)
The motor might be any small 10-20 watt, 120-volt AC motor that runs at 1,500-3,000 rpm. Previous document gamers or small followers are supply for these. If you happen to can’t discover something mendacity round or at a thrift retailer, buy a brand new small desk fan for round $10.
Create the Propeller
Use the bottom of the espresso can to create the propeller. Make it one inch huge at its widest level and three inches lengthy (assuming your espresso can is 4 inches in diameter).
Connect the propeller to the shaft of the motor utilizing glue, rubber bands, or, if it’s threaded, washers and a nut. On this instance I used to be in a position to make the most of a part of the fan’s authentic plastic blades for a extra exact match. The much less motion you will have within the blades, the extra effectively (and quietly) they’ll transfer the air. As soon as safe, bend the fan blades so regular rotation of the motor causes downward air stream. The blades’ pitch ought to be 30 to 45 levels.
Type the motor and lamp help bracket from perforated pipe-hanger iron. Lay out your fan and lightweight bulb (in socket) as a measuring information. The width of your bracket ought to be the identical as the inside or your espresso can. Its top ought to permit for half to at least one inch clearance between the bulb and the fan blades.
Connect bracket ends to the motor utilizing the screws holding it collectively.
Connect a few foot of lamp wire to the motor and tape up any uncovered wires to stop electrical shorts.
Tape the lamp wire midway up on the within of the bracket, and ensure it’s away from the fan blades.
Lower the duvet from the underside of a bleach jug that’s barely wider than your espresso can. The peak of your cowl ought to permit for the sunshine bulb to be uncovered 1-1/2 to 2 inches. As soon as your cowl is lower, place the socket on prime and mark the place the bolt holes will must be drilled.
Additionally, you will want a gap within the heart for a hook eye, and one for the outlet wire to enter.
Connect each the motor wires and the outlet wire to the lamp socket.
Set up two 3/4 inch bolts, and a hook eye, by the highest of the duvet.
Line up the bracket and the socket over the bolts, and tighten them down, with nuts.
Screw within the Bulb
Fairly straight ahead.
Slip the espresso can up over the motor and fan in order that the blades are slightly below the floor. Use additional pipe-hanger iron to find out the place holes ought to be drilled. Ensure to not place the screws the place the fan blades will knock into them.
Take a look at the Unit
Examine that every little thing is solidly tightened-down, and check the unit to verify the fan blades spin away from all screws, the wire and the bracket.
For the bag, lower out an 18 inch-long part of undamaged panty hose. Tie a knot in a single finish, flip the bag inside out and slip it over the top of the espresso can.
Safe the Bag
Use a robust rubber band or piece of elastic to safe the bag onto the can.
You’re prepared for bug season. Now get on the market and have some enjoyable.