Circuits & Schematics: metal - 3
Search for: "metal"
Search results: 116 Output: 21-30
- .. I made a base in hardwood with two long grooves in which some sheets of polycarbonate could be inserted. I used a metal working mill to cut the grooves but a hand-held wood router should make just as fine cuts. After cutting the ...16-04-2008
- .. will easily detect both audio and RF signals up to frequencies of around 100 kHz. Note, however that this circuit is NOT a metal detector, but will detect metal wiring if it conducting ac current. Frequency response is from 50 Hz to about ...30-10-2007
- .. control isn't an exception. All parts of the temperature control, including the sensor and the MOSFET transistor (even it's metal backplate!) carry a voltage of up to 12 V. Therefore, it is absolutely required that the circuit is properly ...28-04-2008
- .. form a transient suppresser. The key switch acts as the Set/Unset and Reset switch. For good security this should be the metal type with a key. Circuit Notes Each zone uses a normally closed contact. These can be micro switches or ...07-11-2007
- .. device works in the small area of distance where the magnet is just not able to have enough pull to attach itself to the metal and needs the little help from the coil to pull it up, the coil on its own is not strong enough and the metal ...21-10-2016
- .. whenever you want, and prevent others from being able to read it. The signal sent out by a RFID tag is easily blocked by metal. This means that placing the RFID tag inside of a Faraday cage will prevent the information from being read. ...26-10-2008
- .. Parts Considerations: Just about any transistors will work but if you choose to use older, low gain transistors in metal cans just because they are so good looking (like I did), it might be best to try a 4.7 k and 2.2 uF in place of ...05-11-2008
- .. the other lead to the probe is all that is necessary. The user's body forms the other connection through the beeper's metal case. When the beeper is properly adjusted it draws only 10 uA with nothing touching the probe - no power ...12-11-2008
- .. 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 ...03-12-2008
- .. 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: ...16-12-2008
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