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Search results: 130   Output: 21-30
  1. Ultra-low current drawing 1.5V battery supply Circuit diagram: Parts: R1, R2 1M 1/4W Resistors R3 47K 1/4W Resistor (optional: see Notes) R4 Photo resistor (any type, optional: see Notes) C1 100nF 63V Polyester Capacitor C2 220µF 25V ...
    21-07-2009
  2. Detects 1.8 to 230 Volts DC or AC Minimum parts counting. Circuit diagram: Parts: D1 5 or 3mm. Red LED D2 5 or 3mm. Green or Yellow LED LP1 220V 6W Filament Lamp Bulb P1 Red Probe P2 Black Probe Device purpose: This circuit is not a novelty, but it ...
    21-07-2009
  3. Circuit diagram: Parts: R1, R2 100R 1/2W Resistors C1 100nF 630V Polyester Capacito D1 to D6 1N5408 1000V 3A Diodes (See Notes) D7 TIC225M 600V 8A Sensitive Gate Triac (See Notes) A commercial trailing socket to be modified or a self-made box with ...
    20-07-2009
  4. Here is a circuit for using the printer port of a PC, for control application using software and some interface hardware. The interface circuit along with the given software can be used with the printer port of any PC for controlling up to eight ...
    10-07-2009
  5. Flashes a LED when detecting an incoming call Powered by one 1.5V cell Circuit diagram : Parts: R1 100K 1/4W Resistor R2 3K9 1/4W Resistor R3 1M 1/4W Resistor C1, C2 100nF 63V Polyester Capacitors C3 220µF 25V Electrolytic Capacitor D1 LED ...
    06-07-2009
  6. An ordinary automatic room power control circuit has only one light sensor. So when a person enters the room it gets one pulse and the lights come ‘on.’ When the person goes out it gets another pulse and the lights go ‘off.’ ...
    01-07-2009
  7. Here is a teleremote circuit which enables switching ‘on’ and ‘off’ of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio remote ...
    26-06-2009
  8. T.A. Babu Not properly closing a refrigerator door will no doubt invite huge electricity bills. This gadget is an alert device that beeps if you leave the refrigerator door open for more than 20 seconds. When the door opens, the lamp illuminates ...
    24-06-2009
  9. Andy Collinson Description A circuit that offers visual indication of fluid level in a vessel, with a switchable audible alarm. Example uses would be to monitor the level of water in a bath or cold storage tank. Click, for enlarge The Conductance ...
    15-06-2009
  10. This is a simple project of a sundial wherein the pinion is replaced by a line LASER I took from a LASER level. The LASER is mounted on a RC servo which in turn is driven by a micro controller. The micro controller keeps the time and turns the RC ...
    10-06-2009
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