Showing posts with label sedehana. Show all posts
Showing posts with label sedehana. Show all posts

Thursday, August 16, 2012

Rangkaian UPS sedehana

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Uninterruptible power supply (UPS), also known as a battery back-up, provides emergency power and, depending on the topology, line regulation as well to connected equipment by supplying power from a separate source when utility power is not available. It differs from an auxiliary or emergency power system or standby generator, which does not provide instant protection from a momentary power interruption. A UPS, however, can be used to provide uninterrupted power to equipment, typically for 5–15 minutes until an auxiliary power supply can be turned on, utility power restored, or equipment safely shut down.

While not limited to safeguarding any particular type of equipment, a UPS is typically used to protect computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss.

picture below is a simple series of UPS. This series UPS has a power of 60W (if the transformer is used more, the power output of the UPS is also greater).

UPS
Gambar Skema Rangkaian UPS

description :
Transformer: Min 4 ampere or more
Diode|Dioda: Min 5 ampere or more
Irfz 44: Paste cooling plate


When normal PLN Electricity, of the adapter (the series of the most left) will produce voltage 12 - 13 volt / 5 ampaere. This voltage is used to fill mengoprasikan UPS batery and therefore this UPS if you plan to load a higher modifikasilah of this series that have a higher ampere. PLN electricity when dead, the source voltage in the switch to akan bateray

When electricity PLN suppressed, the source voltage will switch to the battery. ups that may be living longer while the power off, use battery who have ampere / hour high (large) or can also install some of the ways in parallel battery

Friday, August 10, 2012

Rangkaian pemancar FM sedehana

type='html'>Rangkaian pemancar FM sedehana
mini fm transmitter has a range of about 300-400 meters, when using a 9 volt voltage of the power scattered around 300 meters, and when using a voltage of 12 volt then reach around 400-450 meters, depending on the antenna in use.

For L1 and l2 twist it 5 times roll, you can use the pen cartridge to wind it so neat and after the finish remove the contents pen cartridge page. C5 is used for placement frequency. can tune in between 88-108 Mhz, to reach more use referrer antenna (yagi antenna).

Rankaian Pemancar FMSkema Rangkaian Pemancar FM


List of components:
  • C1 = 0.001uf
  • C2 = 5.6pf
  • C3, C4 = 10uf / 16V (ELCO)
  • C5 = 3-18pf (Adjustable Cap)
  • R1 = 270 Ohm 1/4W
  • R2, R5, R6 = 4.7k 1/4W
  • R3 = 10K 1/4W
  • R4 = 100K 1/4W
  • Q1, Q2 = 2N2222A (NPN transistors) or 2N3904
  • L1, L2 = 5 Turn Air Core Coil
  • MIC = Electret Microphone
  • 9V Battery, PC Board, Wire For Antenna
Note:
This series can be arranged under the Frequency 88 Mhz 188 Mhz or above depending on our desires. Test transmitter must be repeated for coverage and that no signal fraction of the commercial broadcast radio or television station about the location