Showing posts with label circuit. Show all posts
Showing posts with label circuit. Show all posts
Tuesday, April 2, 2013
Solve buzzing and noise on the amplifier circuit
Power amplifiers that we sometimes raises a raft of small drone as groundingless than perfect.The following are some ways to cope with the hum of the power amplifier:
1. Keep sensitive circuits of the transformer, casing dimensions are not too small.One blog even suggested to use two-bok, bok special one for the transformer. For the toroid transformer or amplifier with a large transformer, should only contain a series of power amps, with no tone control.
2. Change the position of the transformer, side by side into the lower side (the transformer is high) withfacing a series of sensitive posts
3. Use a spacer on each PCB board as high as half the height of the transformer, eg as high as 2.5 cm or more so that the PCB board parallel to the core / center of the transformer, here the effect of the weakest fields.
4. We recommend using a stereo module instead of two mono modulesThis avoids wiring errors. If forced to, try to sizecable between the right and left modules as long and as short as possible.
5. Should take the ground path for the speaker of ct ct elco instead of the transformer,if the board pcb mounted two big elco (like elco power supply), takeground path of the speakers here, and check to hear!
6. Power supply for radio (TX or RX) is very sensitive, use a capacitor4x100nf, 4 pairs of these capacitors in parallel to each mem-diode (bridge).
7. At the tone control circuit IC op-amp that uses a symmetric power supply,sufficient ground wiring is taken from the signal ground wires only. shouldIC power supply (7812) installed near the main power supply, notmounted near the tone control.
8. Always use a stereo cable shrouded perfect (color stereo cablered-white-covered ground and wrapped in transparent skin.
9. For power supply, use capacitors of 2200uF per ampere elco
10. Zoom and ground wires as short as possible, especially a pair of elco (ct line between elco) power supply (can be tried for the amplifier blazer)
11. For the amplifier should be mounted to the computer casing when not in the ground soil is diground PC casing soil
12. Pairs of each kit to the circuit without passing groundnya nut / baud / spacer. Do not let the existing ground line at the hole pcb connected to the casing / box. Do not follow this ground. ground attached to the casing should have one. if necessary use a plastic spacerovercome the noise:
1. Use the active component (IC) that qualified as TL084, TL074, notLM324. LM324 any brand of noise. TL084 is more guaranteed authentic yellow (ST), not white. For now, the IC TL084 is printed white-work unstable frequencyhigh (treble breaks and more noise). For IC 4558 (NE5532) use plain white silk screening JRC4558D or TL072 - TL082 yellow, LF353 noise. LM741 (NE5534) can be replaced with the Hitachi HA17741, LF351 noise may also, has never been tried.we do not have to look for the brand and the price is more expensive because it is the most low noise.
2. If necessary, the circuit power amplifier OCL, lowering its gain by lowering the value ofresistor in the path gain from 33k to 22k speaker, mimics the gain-clone lower amplifier noise.
3. Should simplify the circuit, the circuit is too complex is more susceptible to noise and interference.
4. Should then potentio / volume mounted on the input-power amplifier, such as professional amplifier without tone control.
Friday, January 18, 2013
1996 Suzuki Esteem Cooling Fan Circuit and Cooling Fan Wiring Diagram
The 1996 Suzuki Esteem Cooling Fan system consists of control relay for: radiator fan (located in relay box), air conditioning fan motor, radiator fan motor, condenser fan motor, junction box, fuse and relay box, engine control module. The following circuit diagram and wiring diagram / schematic shows 1996 Suzuki Esteem Cooling Fan system. (click image to enlarge)
Tuesday, January 15, 2013
Alfa Romeo 155 Starting and Charging Circuit Diagram
When the ignition key is turned in switch B1 to the STARTING position, it activates the coils of the solenoid (pin 50) of the starter motor A11 and with the voltage coming from the battery A1 (pin 30) supplies the actual starter motor, thus starting the engine.
Note: in vehicle equipped with an anti-theft device the power supply to the starter motor (ignition key in the STARTING position) crosses the anti-theft device control unit N45 which cuts of this power supply in the event of an alarm.(click image to enlarge)
The DC current generated by the alternator A3 is sent to the battery A1 passing through motor A11.
All the power supply lines of the various electrical system on the vehicle start from the branch terminal board G56 connected to the + terminal of the battery A1.
When the alternator does not turn and therefore the battery is not being charged, an earth signal is sent to the instrument panel C10 and illuminates the relative warning light. When the engine is started this signal becomes 12V and the warning light goes out.
Friday, January 4, 2013
1997 Audi A4 Air Conditioning System Circuit and Schematic Diagram on 1997 Audi A4
The following wiring diagram / scematic shows 1997 Audi A4 air conditioning system Circuit and Schematic Diagram which consists of A/C control head, footwell/defroster, flap motor and sensor, temperature regulator, motronic engine control module, interior temperature fan and sensor, digital outside air temperature/ transmission range selector lever display, sunlight photo sensor, A/C compressor speed sensor, outside temperature sensor, fresh air intake duct, fuse panel and instrument cluster, A/C compressor clutch relay, central flap motor and sensor, back pressure motor and sensor, center outlet temperature sensor, fresh air blower, coolant fan control thermal switch, coolant fan, and coolant fan control relay.
[read here...]
For detailed information about 1997 Audi A4 Air Conditioning System Circuit and Schematic Diagram here (diagram 1 and diagram 2, source: autolib.diakom.ru)
2000 Jeep Cherokee Heater Control Circuit Diagram Wiring Diagram
This picture depicts the 2000 Jeep Cheroke Heater Control Circuit and Wiring Diagram. The heater control is adjustable to the following: high, medium, low, defrost, heat, vent, bi-level and off. The A/C heater system itself consists of blower and blower motor resistor block, blower motor relay, junction block, heater control and power distribution centre. The Following wiring diagram / schematic illustrates the 2000 Jeep Cherokee Heater Control Circuit and Wiring Diagram.
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