Voltage Divider vs Proximity

A handy engineering utility that solves for voltages or resistor values in a common voltage divider circuit. Enter three terms (out of Vin, Vout, R1 or R2) and this app will solve for the fourth term automatically. The resistor picker will only let you pick from actual resistor values that exist. It's a great time saving tool for quickly selecting resistor values in a switching power supply design or any other circuit that incorporates a voltage divider. When solving for a voltage, select two resistor values and one of the voltages. The remaining voltage will be displayed automatically. The max and min possible voltages will also be displayed based on the resistor tolerances. The current and power through the divider will be displayed at the bottom of the screen. When solving for a resistor value, select two voltages and one resistor value. The remaining resistor value will be displayed in yellow. This is an ideal value. Use the resistor picker to select an actual resistor value close to that ideal value. You can then tell the app to solve for Vin or Vout to see if the resulting voltage meets your design requirements.

Have a "naked" access card or fob and need to determine its appropriate number and facility code? If you're able to extract the binary or hexadecimal value then Proximity will do the rest. The first calculator of Proximity works one of two ways: By inputting the raw binary value of the card or by inputting the hex equivalent. To use the binary input, simply tap on the box and type in the binary value. The counter in the lower-right corner of the box will keep track of the amount of digits currently displayed. To use the hex input, tap on the box and enter the hex value. Once complete, select the bit length from the wheel below. This is only necessary when calculating from a hex value. After tapping on calculate, the output will be displayed. If there is more than one system in the same bit length, tap on Next to cycle through the different formats. The second calculator is simply the reverse of the first: 
Input the facility code, card number, select the format, and tap calculate to generate the raw binary value. More formats will be released in future versions so long as the information is acquired. If there's a format not on this app and you have the breakdown information, send it to me and I'll fulfill the request. Currently supports the following formats: 26 bits HID® Standard (H10301) 26 bits Indala 31 bits HID® ADT 33 bits HID® Standard (D10202) 34 bits HID® Standard (H10306) 34 bits HID® Northern (N1002) 34 bits Indala Optus 35 bits HID® Corporate 1000® 36 bits Simplex 36 bits Lenel 36 bits S2 37 bits HID® Farpointe (H10304) 37 bits HID® (no Facility Code) (H10302) 37 bits HID® PointGuard 37 bits Software House 40 bits Casi Rusco 40 bits XceedID 40 bits Honeywell (P10001) 48 bits HID® Corporate 1000® Disclaimer:
 HID® and Corporate 1000® are registered trademarks of HID Global Corporation or its affiliates. This application is not affiliated with nor endorsed by HID Global Corporation. Compatibility: iPhone / iPod touch on iOS 8.0 or later and iPad on iOS 12.0 or later. Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com