Second-signal circuit (CC4518, CC4001) circuit

Published:2011/7/23 9:28:00 Author:John | Keyword: Second-signal circuit

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CC4060 second-signal generator circuit

Published:2011/7/23 9:29:00 Author:John | Keyword: second-signal generator

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Multi-phase shift signal generator circuit

Published:2011/7/23 9:29:00 Author:John | Keyword: shift signal generator, Multi-phase shift signal generator

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Southeast Soveran cooling system circuit

Published:2011/7/23 9:29:00 Author:John | Keyword: cooling system

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Southeast Soveran starting system circuit

Published:2011/7/23 9:30:00 Author:John | Keyword: starting system

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Benz C220 WDB H A22 EXRH 123456 identification code circuit diagram

Published:2011/7/20 20:17:00 Author:Ecco | Keyword: Benz, WDB, H , A22 , EXRH, 123456 , identification code

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MOTION_ACTIVATED_MOTORCYCLE_OR_CAR_ALARM

Published:2009/6/22 23:47:00 Author:May

Trembler (motion activated) switch sounds the alarm for 5 seconds. Then it goes off. Circuit is timed out for 10 seconds to allow the trembler switch to settle.   (View)

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AUTO_BURGLAR_ALARM

Published:2009/6/22 23:44:00 Author:May

Dome light current through L1 closes reed switch and sounds alarm. Shaker switch also activates alarm.   (View)

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VEHICLE_SECURITY_SYSTEM

Published:2009/6/22 23:39:00 Author:May

This alarm gives a 15-20 second exit and entrance delay. After being triggered, the alarm sounds for five minutes and then shuts off. Once triggered, the sequence is automatic and is not affected by subsequent opening or closing of doors.   (View)

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The light isolation data collecting system circuit

Published:2011/7/21 2:35:00 Author:Seven | Keyword: data collecting system

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The loudspeaker power amplitude limiter circuit

Published:2011/7/24 7:35:00 Author:Seven | Keyword: power amplitude limiter

In the figure is the circuit which utilizes the amplitude limiter to reduce the low frequency power. Under 200HZ, the circuit limits the threshold voltage. When it is low frequency, the amplifier A1 gain is 1. The amplifier is starting when it is 25HZ, the gain is 6Db/octave, and it is cut off, R4 is used to adjust the impedance. VBE of Q1, voltage drop of D1, voltage of LED, they together set the threshold voltage which is 2.8V or so(peak) or 2.0V(RMS). A01 is used to weaken the signal voltage.   (View)

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MOTORCYCLE_TUNE_UP_AID

Published:2009/6/22 22:28:00 Author:May

Performing a tune-up on a newer bike is made a lot easier with this helpful circuit. Because of the high voltages present, make sure that S1 has an insulated handle and that the fixture is grounded. With the ignition turned off, remove one of the spark plug wires and connect it to the spark plug on the fixture. Slip the fixture's end cap over the spark plug on the cycle and you're ready to go. Open S1 and start the engine. Then, close S1; the cylinder with the fixture should not fire and a spark should be seen at the fixed gap. Be sure that the fixture is cqnnected to the engine ground before closing S1 .   (View)

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AUTOMOTIVE_HI_ZTEST_LIGHT

Published:2009/6/19 2:41:00 Author:May

This test Iight has a high-input impedance and draws only 1 mA at 12V. Q1 switches dc to a battery and lamp circuit.   (View)

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SMART_TURN_SIGNAL_FOR_AUTOS_AND_MOTORCYCLES

Published:2009/6/19 2:24:00 Author:May

Momentarily pressing S1 starts the left on-time timer and produces a positive output at pin 3 of U1. Power for the on/off signal timer, U3, is supplied through D1.Also, a positive bias is supplied from U1's output to the base of Q3, turning it on and turning Q4 off. Unclamped Q1 turns the left turn-signal lamp on and off at that same low-frequency rate. Because U2 is not activated, its output at pin 3 is low, keeping Q5 off. With Q5 turned off, Q6 is on, clamping the gate of Q2 to ground and keeping it from responding and supplying an output for the right turn-signal lamp. The left turn signal continues to operate until the UI timer circuit times out; the right turn signal operates in a similar manner, with U2 setting its operating time.Potentiometer R10 sets the running time for the left turn signal and R11 sets that for the right turn signal.   (View)

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TACHOMETER_SIGNAL_CONDITIONING_CIRCUIT

Published:2009/6/19 2:21:00 Author:May

This circuit, for use with auto tachometers, cleans up the ragged distribution waveform before it is sent to pulse counter circuits.   (View)

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MOTORCYCLE_TURN_SIGNAL_SYSTEM

Published:2009/6/19 2:20:00 Author:May

Tired of making hand signals? Build this simple turn-signal system and keep your hands on the handlebars.   (View)

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AUTOMOTIVE_ELECTRICAL_MONITOR

Published:2009/6/19 2:10:00 Author:May

The automotive electrical diagnostic system is built around a Maxim MAX8214ACPE five-stage voltage comparator, which contains a built-in 1.25-volt precision reference, and on-board logic that allows the outputs of two of the comparators to be inverted.   (View)

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ELECTRONIC_AUTO_STETHOSCOPE

Published:2009/6/19 2:06:00 Author:May

The heart of the Stethoscope is the NE5532 audio op amp, UI. That component directly drives low impedances and allows the use of headphones without adding another amplifier.   (View)

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Beijing Hyundai Sonata motor-driven door and window switch circuit diagram

Published:2011/5/6 3:41:00 Author:muriel | Keyword: Beijing Hyundai Sonata, motor-driven, door and window, switch

Beijing Hyundai Sonata motor-driven door and window switch circuit diagram is as shown   (View)

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AUTO_SECURITY_SYSTEM_TRANSMITTER

Published:2009/6/17 23:20:00 Author:May

This transmitter operates at 49 MHz and uses an M145026 programmable digital encoder to generate a unique digital code, depending on the positions of S2 and S3, to control ignition and lights or horn. Q1 is the oscillator, Q2 the power amplifier. The antenna is a 36-inch whip or wire antenna.   (View)

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