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  • #: 165807
  • Price: $1.99 In Apple Store
  • Category: Utilities
  • Updated: 2010-07-06
  • Current Version: 1.01
  • 1.01 (iOS 4.0 Tested)
  • Size: 24.10 MB
  • Language: English
  • Seller: KIM JI SUN
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.3 or later
  • © 2010 Nine99 All Rights Reseved.
  •  Add to Favorite apps



This App helps designing a circuit of Transistor.

You can easily design a Guitar effecter and Audio Amplifier when you use this App.

When you set up the value of Passive element in the Common Emitter Circuit, Amplify Ratio is also calculated automatically according to base bias, Emitter Voltage& Current, Load Resistance.


First of all set the Base, Emitter, Collector Register and then touch the ‘Calc’ Button. Electric current, voltage and amplification rate will be automatically calculated.

The circuit which can be calculated are Voltage Divided Bias, FeedBack Bias, Swamped Voltage Divided Bias.

Function of Differential Amplifier design and Filter design in the AF will be added later.

29/6/2010 Update : Support iPad, Support iOS4, Added OpAmp Calc Function,

View iPhone screenshots | View iPad screenshots

iPhone Screenshots

TrCalc iPhone Screenshot 1
TrCalc iPhone Screenshot 2
TrCalc iPhone Screenshot 3

iPad Screenshots

TrCalc iPad Screenshot 1
TrCalc iPad Screenshot 2
TrCalc iPad Screenshot 3

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The information may be outdated (2011-04-20 13:39:38). For actual information go to iTunes

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