Unicon UPL 35V Low ESR Capacitors

£1.90£2.70 Inc. VAT

Addingย capacitors to your setup can make your FPV video signal cleaner and your drone fly better.

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Description

Addingย capacitors to your setup can make your FPV video signal cleaner and your drone fly better.ย Low ESR capacitors can reduce video noise in your FPV feed, reduce noise that can corrupt motor / ESC, radio control signals, and clean up noise going to your Gyro sensors – thus improving flight performance. They can also protect yourย electronic componentsย from voltage spikes.ย Overall they are a highly recommended addition to any build.

Unicon series of capacitors have among the lowest ESR (equivalent series resistance) values in the market.ย Having a ultra low ESR value means that they can filter out noise better than other capacitors with higher ESR values.

Battery usage and recommended capacitor Voltage number recommendations:

4S:ย 25-35V
5S: 35V
6S: 35-50V

What is a capacitor?ย A capacitor is a device that stores electrical energy,ย but unlike a battery does not itself generate energy. They are placed in an electrical circuit to smooth out fluctuations in voltage levels. They absorb and release energy as the circuit current demand changes.

Capacity: There areย no rules on total uFย required, it depends on the power requirements of your quad and howย noisy it is. Generally speaking use 330uF-470uF on individual ESCs, or a 1000uF on the PDB / main battery connection.ย If the capacitor in your build keeps getting hot after every flight, it could be an indication that the cap is too small.

Installation Tip: It isย extremely important to understand the polarity of a capacitor. If you make a mistake, the capacitor wonโ€™t work and can even explode.ย The shorterย leg indicates negative (-) the longer leg is positive (+).

Specification
  • Capacitance: 470uF / 1000uF
  • Leakage Current: 3290uA / 7000uA
  • ESR: 0.024 Ohm
  • Voltage: 35V
  • Maximum Voltage: 160V /ย 125ยฐC
  • Temperature: -55+125ยฐC
  • Size: 10×12.5mm (470uf) / 10×22.5mm (1000uF)

Included:

1xย Unicon UPL 35V Low ESR Capacitor

Q&A

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Advice

Learn about voltage regulation:ย Supplying your electrical components with the correct voltage is crucial for their operation. LiPo battery cells are rated at 3.7 volts per cell, therefore a range of voltages are available, leading from 3.7v (1S) to 44.4v (12S). A 3 cell 11.1v pack is widely employed as it provides a handy voltage for many electronics without the need to regulate. However, more powerful multirotors require LiPos with greater voltages; 6S (22.2v) is common for octocopters, thus voltage regulation is necessary to supply power to auxiliary components, such as the: receiver, flight controller, camera, transmitter and lights etc.

There are two types of regulators, linear and switching. A linear regulator works by taking the difference between the input and output voltages, and just burning it up as waste heat. The larger the difference between the input and output voltage, the more heat produced. This is the reason why linear regulators are usually only compatible with up to 3S LiPos. Linear regulators typically operate with efficiencies of 40%, reaching as low as 14%. On the other hand, switching regulators are far more efficient. They work by storing pulses of energy taken from the battery in a capacitor and then releasing it. This is accomplished with the help of an electrical switch and a controller, which regulates the rate at which energy is transferred to the output (hence the term โ€œswitching regulatorโ€). The energy losses involved in moving chunks of energy around in this way are relatively small, and the result is that a switching regulator can typically have 85% efficiency. Since their efficiency is less dependent on input voltage, they are compatible with higher voltage LiPos. While they are preferable to linear regulators you should consider their placement within the UAV carefully, as in some cases the switching noise can cause interference with the receiver.

Within a multirotor context, the term “BEC” (Battery Eliminator Circuit) is exchangeable with voltage regulator. The use of a BEC negates the traditional need for a separate battery to power you flight auxiliaries, for example a receiver. Most speed controllers (Not OPTO ESCs) incorporate an internal 5v linear BEC, so that simply plugging the ESC into the receiver is all you need to supply power to it. However, as mentioned above they only work well under low loads and at low voltages. For higher voltage/current applications it is recommended to use a stand-alone SBEC – that way you reduce the risk of a brownout (a term used to describe the temporary loss of function of the radio receiver due to the supply voltage dropping too low). Confusion often surrounds the difference between a UBEC and an SBEC, however they are both the same thing – a switching voltage regulator. “UBEC” was once a specific brand name for one of the original switching BECs, so the more correct generic term is actually SBEC.

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Shipping

SHIPPING & DELIVERY

We are based in the UK, but ship to most worldwide destinations. Postage rates are calculated by the size/weightย and shipment location. We process orders Monday to Friday and pride ourselves on our quick turnaround of orders - most UK orders will arrive the next day.

We are partnered with several delivery companiesย including Royal Mail, DHL, UPS and Parcel Force. If you have a special delivery requirement or would like to arrange a shop collection pleaseย contact us.

A confirmation email will be sent when your order has been dispatched. If you wish to change your order, please contact us promptly, as we won't be able to make amendments once the order has been shipped.

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Shipping to the UK

  • Order before 4PM for same day dispatch with Royal Mail, 2PM for next day delivery with DHL and 1PM for next day delivery with APC.
  • We offer FREE Shipping on UK orders over ยฃ99, weighing less than 1kg.
  • The courier options deliver Monday to Friday, Royal Mail delivers to residential addresses on Monday to Saturday.

For small low value orders our cheapest delivery service is Royal Mail First Class.ย For a guaranteed next day delivery we recommendย Royal Mail Special Delivery orย one of our courier delivery options.

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