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Search for: "metal detector"
Search results: 153   Output: 51-60   Including: detector (81); metal (80).
  1. .. NPN transistor, you can drive as many as seven LEDs using a minimal amount of voltage and power from a single NiMH (nickel-metal-hydride) AA cell. The circuit works by creating much higher-voltage pulses than the voltage for powering the ...
  2. .. passive components will enable us to safely monitor the temperature of our coffee cup. Bundle this circuit inside a round metal container (metal helps conduct the cup's heat to the circuit) and you have a Smart Coaster. TIME: 3 hours COST: ...
  3. .. maximum: stronger pulses will be easily perceived and the LED will shine more brightly. Electrodes can be obtained by small metal plates connected to the output of the circuit via usual electric wire and can be taped to the skin. In some ...
  4. .. can be dramatically increased omitting LED D2 and its associated resistor R5. Use a plastic box to enclose the circuit: metal cases can severely limit electromagnetic radiation. Disclaimer: we can't claim or prove any therapeutic ...
  5. .. that important, but I recommend about a 9 cut (this will help make balancing easier later on). We may then slide the tail metal into the hole and use the 1/4 drill bit to drill and attach the tail to the square tubing. We will then want to ...
  6. .. Flange 36 x 1 Square Tubing 1/2 Bore Circular Sawblade (for hub) 5/8 x 1/2 Arbor (to attach sawblade to motor shaft) (2) Metal Straps 8 x 4 PVC Pipe 30 x 8 PVC Pipe (6 pipe works well too) A DC Permanent Magnet Motor (preferably Ametek ...
  7. .. card and not higher than one inch. I used Lego bricks because I had some handy. Wood may work better. Try not to use any metal that can be attracted by the magnet. Put some glue on the magnet when it is inside the cylinder. On this step, ...
  8. .. LEDs, resistors and some wire plus good set of different tools and couple of straight hands ;-) LCD consists of PCB, metal frame and liquid crystal glass assembly. Back side of LCD glass is covered with very thin reflective film, ...
  9. .. a 3 V coin cell battery a 100 Ohm resistor (anything close to 100 will work) a momentary or push button switch. thin sheet metal plexiglass tools: hot glue gun metal shears sharpie saw soldering iron Cut out 6 squares of equal size from the ...
  10. .. use glue if needed. Remember also in designing your mount -- the magnetic field from the magnet disc should be away from metal cage bars or other metal will be attracted to these metal parts and will be slowed down ...
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