20-Watt Amplifier Kit This kit contains all the parts necessary to build a 20W Mono Hi-Fi Amplifier using a LM1875 to amplify any small signal and to drive an 8 ohm speaker with 1% THD. Requires a 12-30 Volt DC power supply. MSRP: Was: Now: $19.95 Add to Cart
Audio Level Meter Assembled Demo 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 a 9V battery. Teacher Demo Unit, Assembled/Tested. MSRP: Was: Now: $59.95 Add to Cart
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... MSRP: Was: Now: $120.00 Add to Cart
Audio Level Meter Kit The louder the sound, the more the LEDs will light. This kit uses the LM3915 Bar Graph IC and an audio pre-amplifier stage to measure an audio level. It has a sensitivity adjustment to increase or decrease the microphone sensitivity level. Requires 9VDC... MSRP: Was: Now: $13.95 Add to Cart
Blinking LEDs Kit When you want the attention you deserve, put this kit on your shirt, but you have to assemble and test it! This kit demonstrates how to blink 2 LEDs with common electronic components, i.e. transistors, capacitors, resistors. Requires 9VDC battery. MSRP: Was: Now: $3.95 Add to Cart
Continuity Tester with Electric Buzzer and LED Light Assembled Demo Teacher demo unit is assembled and tested. When troubleshooting a circuit, this kit would be a great tool to test for continuity in a circuit. It has a LED light and built-in electric buzzer for a clear audible sound. PC board measures 1-1/2 x... MSRP: Was: Now: $59.95 Add to Cart
Continuity Tester with Electric Buzzer and LED Light Bulk Pack Bulk Pack of 20 Kits As Low As $4.95 Per Kit This is a real test instrument! Don't be fooled by the low price. KELVIN® is making this kit affordable for all. When troubleshooting a circuit, this kit would be a great tool... MSRP: Was: Now: $99.00 Add to Cart
Continuity Tester with Electric Buzzer and LED Light Kit This is a real test instrument! Don't be fooled by the low price. KELVIN® is making this kit affordable for all. When troubleshooting a circuit, this kit would be a great tool to test for continuity in a circuit. It has a LED light and built-in... MSRP: Was: Now: $7.95 Add to Cart
Continuity Tester with LED Light Bulk Pack Bulk Pack of 20 Kits As Low As $2.95 Per Kit This is a real test instrument! Don't be fooled by the low price. KELVIN® is making this kit affordable for all. When troubleshooting a circuit, this kit would be a great tool... MSRP: Was: Now: $88.50 Add to Cart
Continuity Tester with Mechanical Buzzer and LED Light Bulk Pack Bulk Pack of 20 Kits As Low As $4.95 Per Kit This is a real test instrument! Don't be fooled by the low price. KELVIN® is making this kit affordable for all. When troubleshooting a circuit, this kit would be a great tool... MSRP: Was: Now: $99.00 Add to Cart
Decision Maker Kit When you have to make a decision of "YES" or "NO" , "Heads or Tails", make your life simple and get the KELVIN® Electronic Decision Maker. Requires 9VDC battery. Kit. MSRP: Was: Now: $3.95 Add to Cart
Decision Stick Kit Push the button to display the answers to your questions. Requires a 9V battery. MSRP: Was: Now: $9.95 Add to Cart
