2005منتدى Brackets/Widgets
خيارات تنظيم الصمامات لأجهزة التسجيل على متن الطائرة من 14.4V إلى أقل
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ما توصّل إليه النقاش
- فأجهزة التنظيم البديلة أكثر كفاءة من الأنواع السطرية، مما يولد قدرا أقل من الحرارة ويسمح بزيادة الناتج إلى أقصى حد مع الحد الأدنى من عقوبة الوزن.
- Linear regulators like the 7805 are inexpensive and compact but limited to around 1 amp output and generate significant heat when stepping down higher voltages at moderate currents.
- A pass-transistor circuit using a standard 78xx series regulator combined with a power transistor like the TIP32 can increase current capacity while keeping costs under 5 dollars.
- Switching regulators can induce interference in video signals, which can be mitigated with capacitors placed at the regulator output.
- When using linear regulators at higher currents, adequate heat-sinking is essential as they must dissipate the voltage difference multiplied by the current as waste heat.
- Switching regulators in plastic housings offer convenient mounting options compared to linear regulators requiring large heat sinks.
- For applications requiring different voltage outputs from the same battery source, multiple regulator leads can be built with dropout occurring when battery voltage drops sufficiently below the desired output.
- Pre-built adjustable DC-DC switching converters with ratings of 3 amps or higher are commercially available at reasonable cost from electronics suppliers.
يعتمد على
- One reported case of video interference from a switching regulator powered from mains AC, but unclear if this applies to DC switching supplies.
- Linear regulator approach reliability concerns mentioned for high-current applications typical in recording equipment.
- Pass-transistor circuit design requires calculating resistor values based on specific device current draw; incorrect calculations could cause device damage or resistor failure.
- Heat dissipation capability depends on ambient temperature and available natural airflow; high power applications may require active cooling in hot environments.
- Ground isolation issues possible in certain vehicle power configurations when using metal heat sinks.
- Warranty may be voided when using non-original power supplies on some equipment.