iOS Universal Reference
It's a version of eTools for iOS before iOS5.0 with a little simple interface and full fuctional. (If You have iOS5.0+ look at eTools)
eTools Legacy is a powerful virtual toolbox which combines a lot of useful reference materials with electronics tools (calculations, conversations, coding/decoding, etc) in one application in your iOS family devices. Professional or hobbyst can easy recive most of necessary informations or calculation results at some simple finger touches.
Resistor Color Code.
Chip-resistors (smd) decoding (3 digits, 4 digits, EIA-96).
Axial inductors colors decoding.
Reactance (XC for capacitance and XL for inductance).
Resistors voltage divider, ideal and with load. Variable resistor emulation. ("E24 rounded" integrated).
Parallel resistors ("E24 rounded" integrated).
Capacitor charging calc.
Resistor for LED(s) (with most popular presets).
Operational amplifiers: non-inverted and inverted ("E24 rounded" integrated).
Compute LM317 with variable resistor emulator ("E24 rounded" integrated) voltage & current mode.
Compute 555-timer: astable mode with ratio 50%-100% and astable mode with ratio 0-100%
Wire voltage drop calculator.
USB 1.x/2.0 & USB 3.0 pinouts and specifications.
FireWire 4, 6, 9-pins.
RS232 (DB9 & DB25 & IDC).
Parallel (LPT port) / Centronics.
Ethernet (RJ-45) direct & crossover connections.
Parallel ATA (PATA/EIDE interface).
Serial ATA (SATA/eSATA).
AT-keyboard & PS-2 keyboard/mouse.
ATX-power (20/24-pins) & auxilary connectors.
Molex & fan connectors.
DisplayPort & MiniDisplayPort.
VGA (standart & VESA modes).
RCA (with typical color marking).
Professional Jack (6.3mm) & MiniJack (3.5mm) - 2, 3, 4 poles.
XLR/Cannon (3, 5-pins).
PS-x AV multiout.
iPod 30pin connector
EMU (Enhanced mini-USB)
Symbols & abbreviations.
AWG & SWG wires.
Maximum current for copper assembly wires.
Basic logic gates.
7400 family (while only a list of family with functions and decoding).
78xx/79xx family (basic data, scheme, packages).
Interactive 7-segment display.
Bipolar transistors (nearly 50000 pcs) catalog & select.
FETS (JFET & MOSFET) (nearly 5000 pcs) catalog & select.
IGBT transistors (nearly 1000 pcs) catalog & select.
Fixed 460Ω issue in resistor value by color section
Added pinout 4-wire connection in RJ-45