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Electrical and Electronics Excel Calculators
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NUD4001 LED Design Tool
The NUD4001 from ON Semiconductor is a low cost versatile LED driver. The device allows the user to set the current with an external resistor and it is capable of delivering currents of up to 500 mA in a SO8 package.
Available Fault Current Calculator Excel Spreadsheet
The Available Fault Current, prospective short-circuit current (PSCC), or short-circuit making current is the highest electric current which can exist in a particular electrical system under short-circuit conditions.
Fire Alarm Notification Appliance Circuit Calculator Excel Spreadsheet
A fire alarm notification appliance is an active fire protection component of a fire alarm system. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
Arc Flash Calculator per NFPA 70E Calculator Excel Spreadsheet
This Excel file combines arc flash equations from a proposal to NFPA 70E-2003 with simplified equations to calculate available fault current. This tool uses methods that have been shown to result in conservative estimates of fault current, which should result in conservative estimates of arc incident energy if appropriate arc fault clearing times are used . An IEEE 1584 equation is used to calculate arcing fault current.
NCP108x Flyback CCM Design Calculator Excel Spreadsheet
This spreadsheet calculates both system and component data for use with the NCP108x in a continuous conduction mode, isolated and non-isolated flyback topology. Calculations are based on system specifications provided by the user.
NCP1611 Generator Frequency Calculator Excel Spreadsheet
The NCP1611 is designed to drive PFC boost stages in so-called Current Controlled Frequency Fold-back (CCFF). In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a programmable value.
XR-2206 Function Generator Frequency Calculator Excel Spreadsheet
This spreadsheet shows the output frequency of the XR-2206 function generator chip for various standard values of R2 and C. Read R2 down the left column and C across the top row.
Voltage Divider for 5% Resistors Calculator Excel Spreadsheet
This sheet shows the outputs of a voltage divider for standard 5% valued resistors. Vin (currently set at 10V) can be changed to any desired input voltage and the sheet recalculated. Read the values of R1 down the left hand column, and the values of R2 across the top row.
CMOS Schmidt Trigger Oscillator Calculator Excel Spreadsheet
CMOS Schmidt Trigger Oscillator Calculator Excel Spreadsheet. This sheet shows the approximate frequency of an oscillator built around 1/6 of a CMOS 40106 hex Schmidt trigger package.
NE570 VCA Output Biasing Calculator Excel Spreadsheet
For best headroom in a VCA circuit, the output of the NE570 should be biased up to 1/2 the supply voltage. This is accomplished by selecting external resistor R (which parallels internal resistor R4).
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