Skema Rangkaian|Electronic Schematic Circuit Diagram

Skema Rangkaian Kompas Digital

Compass Digital Specifications:

· Power: 5-18 volts DC @ 30 ma

· Inputs: Earth’s magnetic field

· Outputs: Open collector NPN, sink 25 ma per direction, digital output 1 or 0

· Size: 12.7 mm diameter, 16 mm tall

· Temp: -20 to +85 degrees C

· Provides 8 headings (N, NE, E, SE, S, SW, W, and NW).
· 12 degree tilt with acceptable results

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Switch Mode Pre-Regulator Circuit

The botheration was that a voltage regulator had to bead the 18 volt capital ability accumulation voltage to 8 volts at 500ma to ability the CD player, crumbling 5 watts of ability and causing a lot of calefaction central the bunched unit. This ambit acts as an interference-free pre-regulator to abundantly abate the ability loss..

The achievement voltage of this ambit is artless by ability band fluctuations. Amount voltage aberration is alone abased on the on-resistance of Q2 and the amount of C2 (re: ripple). The achievement voltage can be set so that the ripple lulls are aloof aloft the drop-out voltage of the beeline regulator at best amount for best activity conservation. The college amount you aces for C2, the added activity you can save and the added abiding the pre-regulator’s achievement voltage.

Latching Relay On/Off Switch Circuit

The ambit beneath switches AC or DC ability to a amount application an ultra low ability 3v latching broadcast with two coils. The broadcast can handle about 10 amps of current, up to 250vac. Anniversary time the baby pushbutton is pressed, the ambit either latches the broadcast contacts bankrupt or alleviate them open. The 3v powered ambit uses a distinct 74HC14. This accessory contains six Schmitt activate inverters in the one 14 pin package. Two inverters anatomy a flip/flop circuit. Anniversary time the pushbutton is pressed, the ambit changes accompaniment and stays in that accompaniment until the button is apprenticed again. With anniversary accompaniment change, a 25ms latching or unlatching beating is produced and is baffled to the actual broadcast coil. The braid attrition is about 45 ohms so about 70ma of accepted is fatigued from the 3v array for anniversary broadcast pulse. The boilerplate ability is so low that the ambit can accomplish for abounding years on one set of batteries. I would advance application two AA or AAA acrid cells.

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