1, MyScript Calculator 
A calculator called "MyScript Calculator" from developer Vision Objects, and this 17.3 MB tool does bring an unexpected experience. It is definitely the most recent artifact. The calculator, referred to as "artifact"! It turns your phone into a powerful handwriting calculator that simply writes mathematical expressions on the screen, and MyScript technology magically converts symbols and numbers into digital text and gives results in real time. It feels the same as writing on paper, but at the same time has the advantages of digital devices (change, real-time results, etc..). How to calculate the heart essays, but also save a lot of draft paper for you!
2, circuit expert ElectroDroid 
Circuit expert ElectroDroid is a learning software for circuit electronic devices. It is a professional tool. It can provide you with information inquiry and calculation services for various circuits. It is one of the necessary tools for people in the electronics industry. It includes: - resistance color code calculator - chip resistance code - inductance color code calculator; - Ohm's law calculator; - reactance calculator; - voltage divider calculator; - resistance value / resistance series / resistance parallel calculator ;-capacitor charging calculator;-operating amplifier calculator;-LED (light-emitting diode) resistance value calculator;-LM317 calculator;-NE555 calculator-power calculator;-battery life calculator;-inductor design Tools; - voltage drop calculator; - PCB trace width calculator; - filter calculator; - support port pin output (USB, serial, parallel, Ethernet interface, SCART, DVI interface, HDMI interface, S - Video, VGA, Firewire, Jack, XLR, RCA, DMX, ATX, Molex, EIDE, SATA); - Analog to Digital Converter.
Featuring level VI energy efficiency and meet IEC/EN/UL 62368 safety standards for ITE/AV equipment, the external universal power adapter accepts the output voltage 20 Volt with universal AC input voltage range from 100-240VAC and provides 3 Years warranty. These series 20vdc power adapters use PC flame retardant material housing, all materials conform to the international environment protection standard. Protections for over voltage, over current and short circuit are also included.
adapters for 20v 1.5a,ac to dc power adapter 20v,20v 2.5amp power adapter,20v 1a switching power adapter,adaptor 20v 1.25a
Shenzhenshi Zhenhuan Electronic Co Ltd , https://www.szzhpower.com