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Results tagged with power-electronics
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votes
What is the function of jumper pins on a 4 channel relay?
A high level and low level trigger can be configured as the follows.
Note: This information can be found at end of the document from this post
Reference:
Configurable Active High or Low Relay Module …
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1
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AC voltage b/w DC power supply o/p and Ground
Based on the technical data there should not be a 70-80V AC signal in the output terminal. Either you are measuring incorrectly, a wiring issue, grounding issue or defective device.
Per the technica …
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1
vote
Electronic component datasheet handling
You are correct. In the attached document shows minimum 2.0V and above is considered Logic High. Likewise maximum voltage of 0.8V and below is considered logic low.
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1
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Electronic symboles in datasheets
Yes! The logic gates from a RS485/422. Most likely the signal are level shifted. Below is an except form Low power RS-485/RS-422 transceiver ST485B, ST485C datasheet.
Below is an another similar p …
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How to detect what wattage that my Windows laptop is receiving via USB-PD?
Based on the information provided your Dell XPS 9570 might not be designed fully utilize the USB-PD standard. The wattage of the power adapter with the circular jack will provide a good clue as to the …
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1
vote
Why does collector current increase with base current in BJT?
At a high level if you take an NPN BJT transistor for example, P region is the base of the transistor. The transistors P region is much lightly doped than the N region. Since the N region is heavily d …
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My output is much lower than I expect it to be for my transistor-zener diode voltage regulator
The simulation has an AC source feeding the Zener Diode - Series pass transistor circuit. Replacing the AC source with the DC source should eliminate voltage plung situation. Alternatively inserting a …
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votes
Accepted
Simultaneously charging and transmitting data to an android phone using usb
It is assume that the PV panel is charging a battery such as a LiPo or a Li-Ion battery Cell. A battery Gas gauge circuit such a STC3117 (Gas gauge IC with battery charger control for handheld applica …
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Can I Calculate The Discharge of a Capacitor If All I know Is Algebra
Correct you need to find the discharge rate of the capacitor. Take a look at Calculation of Discharge Time. The equation constant current discharge equation 1. For you equation total capacitance is is …
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6
votes
What are the differences between linear and low-dropout (LDO) regulators?
At a very high level linear low-dropout regulators have a pass transistor, an operational amplifier, a resistor divider circuit feeding the operational amplifier and VREF. The operational amplifier is …
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1
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Can a DC voltage booster be connected directly to a DC to AC inverter?
The short answer is yes a DC to DC booster can be connected to DC - AC power inverter. But the key is to define the electrical parameters for your project, and then research for components at will mee …
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3
votes
What is micro-electromechanical systems (MEMS)?
MEMS is a semiconductor based process that can create miniature structures in silicon. When these structures (sensors) are subjected to mechanical stresses (pressure, acceleration, yaw etc) they are a …
CommunityBot
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8
votes
Accepted
How can I find the emission power of a WiFi mobile phone antenna?
Not too sure if you will be able to find datasheet for specific cell phone. These are proprietary information and mobile phone manufactures usually don’t share this type of information in public for v …
CommunityBot
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2
votes
Motor Driver board: limited current
Make sure that the 12V supply is capable of sourcing sufficient current. This the source that powers the output A & B. The 5V input supply is most likely to power the logic circuitry. On PCB board 12 …
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