| Water Clock NEW! All you need to do is fill the reservoir with water and the clock starts working. Inside the reservoir, the water becomes an electrolyte, allowing two metal pieces to act as a conventional battery. By adding a bit of lemon juice, you can help to enhance this process. The only maintenance required is to change the water periodically. It measures approximately 4” x 3.5” (Instructions included) PY30 $18.95  | ||||||
| Knife Switch Easy to use knife switches, mounted on a plastic base. Available in 3 configurations. | ||||||
| Item | Description | Type | Price | |
| E4-SS | Knife Switch, SS | Single Pole, Single Throw | $2.40 | |
| E4-DS | Knife Switch, DS | Double Pole, Single Throw | $3.25 | |
| E4-DD | Knife Switch, DD | Double Pole, Double Throw | $3.80 | |
| Single Pole, Single Throw Plastic base with Fahnestock clips for connecting wires. Switch pivots into spring clamp to complete the circuit. E12 $0.95 | ||||||
| Bulb Holders For building simple circuits with bulbs. Available in 2 configurations: Clip Terminals Fahnstock clips are used to secure the wire. Screw Terminals A small screw is used to secure the wire. | ||||||
| Item | Description | Type | Price | |
| E6-F | Bulb Holder, clip | Screw Terminal | $0.64 | |
| E6-S | Bulb Holder, screw | Screw Terminal | $0.95 | |
| Bulbs Threaded for lamp base, sold in packs of 10. Available in 1.5 or 2.5 volt. | ||||||
| Item | Description | Types | Price | |
| E5-15 | Bulbs, 1.5v | 1.5 volt | $2.55 | |
| E5-25 | Bulbs, 2.5v | 2.5 volt | $2.80 | |
| Insulated Wire Insulated wire for safely making electrical connections without short circuits. Sold in 100' rolls, the wire is 22 gauge and available in red or black. | ||||||
| Item | Description | Quantity | Type | Price | |
| E10-B | Insulated Wire, Black | 100 Feet | Black | $7.25 | |
| E10-R | Insulated Wire, Red | 100 Feet | Red | $7.25 | |
| Fahnstock Clips Nickel-plated clips for making quick and temporary connections in low-voltage circuits. Sold in packs of 200 clips. E3 $26.00 | ||||||
| Single Battery Holder Holds 1 D-cell, made of molded plastic with Fahnstock clips for fast wire connections. E7-D $0.95 | ||||||
| Interlocking Battery Holders Single D-cell size with interlocking connectors to allow multiple cells to be fastened together, parallel or in series. Ends have spring clips for wire connections. Sold in packs of 4. E7-S $5.20 | ||||||
| Miniature DC Motor, 10 pk Flat sides for quick and easy mounting with hot melt glue or duct tape to power all your miniature creations! Requires 1.5 to 3 volts, up to 11,000 rpm. Sold in packs of 10. E21 $16.65 | ||||||
| World's Simplest Motor Build a functioning electric motor that demonstrates all the principals of a full-size motor. No tools are required, just one D-cell battery. E20 $5.20 | ||||||
| St. Louis Motor A classic apparatus for providing a hands on demonstration of the function of an electric motor. A 2-pole armature is held on brass cone bearings and the shaft is fitted with split commutator. Permanent magnets are held in adjustable brackets. The motor is mounted on a bakelite base, 6 3/4" x 3 3/4". Works on a 6v D.C. power source. E18 $42.50 | ||||||
| Hand Generator This small hand crank generator will produce up to 5 volts of DC power. Has a built-in light and the clip lead wires for powering additional motors, lights or bells. E22 $12.80 | ||||||
| Whimshurt Machine Used for generating static electric charges for electrostatic demonstrations. Operated by hand crank, includes Leyden jar capacitors and adjustable ball-ended electrodes. Rotating discs are 9 3/4" diameter, and the unit is mounted on a wooden base. E19 $89.95 | ||||||
| Fruit Clock A fully functional clock and calendar powered entirely by the natural electrical potential of fresh fruit or vegetables. This clock operates on the same principal on which all electrical storage batteries are based. Harvest your own batteries! Scientific explanation included, you supply the fruit. PY24 $15.00 | ||||||
| Meters Economical meter for middle and high school use. Accuracy is +/- 2.5%, and comes with 5-way binding post and external calibrating screw. | ||||||
| Item | Description | Range | Price | |
| E8-V | DC Voltmeter | 0-3V, 0-15V, 0-300V | $11.25 | |
| Simple Electrolysis Apparatus This simple apparatus demonstrates the principle of electrolysis just as efficiently as larger apparatus, without the fragile and expensive glass parts. Great for home schooling or individual students. Consists of a plastic container with mounted carbon electrodes. Supplied with two alligator clips, two graduated test tubes and a complete instruction manual. Works on 6v to 12v DC. PY28 $23.50 | ||||||
