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Search results: 61   Output: 11-20
  1. Tridev Kripa Here is an interesting Car Battery Monitor circuit of a low power electronic dc voltmeter circuit that can be used with car electric systems that run on 12 volt batteries. The voltmeter is an expanded scale type that indicates small ...
  2. Vassilis Papanikolaou Introduction This is a new design for a universal gear indicator that can be fitted to any motorcycle as an aftermarket accessory. Its main advantage is that its operation depends entirely on the gear shift lever movement, ...
  3. Here is a picture of the faceplate that holds the LED bargraphs for air/fuel and pulse width as well as the pot to control the fuel mixture above 7psi boost. The switch allows either the primary or secondary injector pulse to be monitored. The ...
  4. Paul Hill The circuit is drawn with PCB 123 which you can download for free from Click for enlarge As a keen cyclist I am always looking for ways to be seen at night. I wanted something that was a novelty and would catch the ...
  5. Constant current circuitry 12V Battery operation Circuit diagram: Parts: R1 10K 1/4W Resistor R2 33R 1/4W Resistor (See Notes) R3 15R 1/4W Resistor (See Notes) D1 1N5819 40V 1A Schottky-barrier Diode (See Notes) D2--D13 LEDs High brightness, high ...
  6. Three-step beeps signal bumper-barrier distance Infra-red operation, indoor use Circuit diagram: Parts: R15 3K3 1/4W Resistor R16 330K 1/4W Resistor R17 470K 1/4W Resistor R18 150K 1/4W Resistor C6 1µF 63V Electrolytic or Polyester Capacitor ...
  7. Four-LED left and right sequence Particularly suited to motorcycles Circuit diagram: Parts: R1 500K 1/2W Trimmer Cermet or Carbon R2 47K 1/4W Resistor R3,R4 1K 1/4W Resistors R5,R6,R7,R8 10K 1/4W Resistors C1 1µF 63V Polyester or electrolytic ...
  8. Monitors battery voltage Three-LED Display Circuit diagram: Parts: R1,R3,R6 1K 1/4W Resistors R2 100K 1/4W Resistor R4,R5,R7,R8 3K3 1/4W Resistors D1 Red LED (Any dimension and shape) D2 Amber LED (Any dimension and shape) D3,D4,D5 1N4148 75V 150mA ...
  9. Three LEDs signal bumper-barrier distance Infra-red operation, indoor use Circuit diagram: Parts: R1 10K 1/4W Resistor R2,R5,R6,R9 1K 1/4W Resistors R3 33R 1/4W Resistor R4,R11 1M 1/4W Resistors R7 4K7 1/4W Resistor R8 1K5 1/4W Resistor R10,R12-R14 ...
  10. Bar-mode LED-cluster sequencer Can drive up to 16 clusters Circuit diagram: Parts: R1,R5 1K 1/4W Resistors R2 33K 1/4W Resistor R3 100K 1/2W Trimmer Cermet R4 1M 1/4W Resistor R6,R7,R8 10K 1/4W Resistors R9 4K7 1/4W Resistor R10 33R 1/4W Resistor ...
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