KELVIN® 20 Watt Audio Amplifier Bulk Pack Bulk Pack of 10 Kits As Low As $16.00 Per Kit All the parts necessary to build a 20W Mono Hi-Fi Amplifier using a LM1875. Amplify any small signal and drive an 8 ohm speaker with 1% THD. Requires a 12-30 V DC power supply... MSRP: Was: Now: $160.00 Add to Cart
KELVIN® Audio Amplifier Booster Bulk Pack Bulk Pack of 20 Kits As Low As $5.45 Per Kit Amplify music from a portable CD player or any audio signal up to 1W. Relays it to a speaker with volume control (speaker included). Requires a 9V battery. MSRP: Was: Now: $109.00 Add to Cart
KELVIN® Audio Level Meter Bulk Pack Bulk Pack of 10 Kits As Low As $12.00 Per Kit Uses an LM3915 Bar Graph IC and audio pre-amplifier stage to measure an audio level. The Meter includes a sensitivity adjuster to increase and decrease the mic's sensitivity level. Requires... MSRP: Was: Now: $120.00 Add to Cart
KELVIN® Bicycle Safety Light Bulk Pack Bulk Pack of 10 Kits As Low As $9.99 Per Kit Build this kit and connect it to your bicycle or place it on your table top or on the wall for a conversation piece. Requires [2] AA batteries. Does not include enclosure, use... MSRP: Was: Now: $99.95 Add to Cart
KELVIN® Big Ear Bulk Pack Bulk Pack of 10 Kits As Low As $16.00 Per Kit Amplify sounds from different sources (far away, birds, conversations. Add a parabolic reflector and hear blocks away. This kit contains all parts necessary to build an ultra sensitive... MSRP: Was: Now: $160.00 Add to Cart
KELVIN® Blinking LEDs Bulk Pack Bulk Pack of 30 Kits As Low As $1.95 Per Kit When you want the attention, put this kit on your shirt but first, you have to assemble and test it! This kit demonstrates how to blink two LEDs with common electronic components such as... MSRP: Was: Now: $58.50 Add to Cart
KELVIN® Continuity Tester Bulk Pack Bulk Pack of 20 Kits As Low As $2.95 Per Kit Don't be fooled by the low price - this is a real test instrument with LED light only. When troubleshooting a circuit, this kit would be a great tool to test for continuity in a circuit... MSRP: Was: Now: $88.50 Add to Cart
KELVIN® Continuity Tester w/ Electric Buzzer Bulk Pack Bulk Pack of 20 Kits As Low As $6.25 Per Kit Don't be fooled by the low price - this is a real test instrument with Electric Buzzer and LED Light. When troubleshooting a circuit, this kit would be a great tool to test for continuity in... MSRP: Was: Now: $125.00 Add to Cart
KELVIN® Continuity Tester w/ Mechanical Buzzer Bulk Pack Bulk Pack of 20 Kits As Low As $4.95 Per Kit Don't be fooled by the low price - this is a real test instrument with Mechanical Buzzer and LED Light. When troubleshooting a circuit, this kit would be a great tool to test for... MSRP: Was: Now: $99.00 Add to Cart
KELVIN® Decision Maker Bulk Pack Bulk Pack of 30 Kits As Low As $3.30 Per Kit Whenever you have to make a "YES," "NO," or a "Heads or Tails" decision, make your life simple and buy KELVIN®'s Electronic Decision Maker. The Kit includes all parts. Requires a 9V... MSRP: Was: Now: $99.00 Add to Cart
KELVIN® Decision Stick Bulk Pack Bulk Pack of 20 Kits As Low As $7.45 Per Kit Push the button to display the answers to all of your questions. Requires a 9V battery. Does not include enclosure, use 430202. MSRP: Was: Now: $149.00 Add to Cart
KELVIN® Fiber Optic Alarm Chain Bulk Pack Bulk Pack of 10 Kits As Low As $24.50 Per Kit Design, Build and Test a Structure Wrap the fiber optic cord around a valuable possession. If the cord is cut, the relay will trigger your alarm circuitry (not included). The... MSRP: Was: Now: $245.00 Add to Cart
