Sunday, July 29, 2012

TENMA 72-9390 Pen Style Multimeter

TENMA 72-9390 meter is a cool pen style multimeter. It feels right in the hand and incredibly simple to use, and accurate as professional multimeter.

The meter is 181mm long, and comes with a single (negative) test lead, 3V Li-MnO2 button cell, and instruction leaflet.

TENMA 72-9390 Pen Style Multimeter

TENMA 72-9390 is 3000 counts, true RMS, pen style multimeter with following core features:

  • Check continuity, AC/DC voltages (up to 300V), resistance (up to 30 MΩ), diode and capacitance (between 0.001nF to 3mF).
  • Sleep mode
  • Digital mode selection with audible feedback
  • Automatic ranging
  • Data hold, Max/Min mode selection
  • Sharp display backlight and test lead LED (for input terminal) to work in poorly lit areas
  • CATIII 300V safety rated
This meter keeps the digital display is in your hand and eyesight. This makes for easy reading of the display and one handed access to the function keys. The function key layout of this meter is simple and solid. Because of that you can easily familiarize with this meter within a short amount of time. 

I test this meter reading with Sanwa PC20 multimeter and GW-Instek GDM8034 bench multimeter, and it gives exact readings as above professional multimeters.

As a summery this is a very impressive pen style multimeter. It is easy to use, lightweight (90.2g with battery) and higher quality than its rated price. I like to highly recommended TENMA 72-9390 (especially) for electronic troubleshooting works.

This multimeter is available at element14 (formerly Farnell) and I got it from element14 Singapore within 1½ days. Complete technical specifications of this multimeter are available in here.

Friday, July 20, 2012

LiteASM - Light Weight & Customizable Assembly Compiler & Virtual Machine

LiteASM is a Light weight and reconfigurable Assembly language compiler and Virtual Machine.
It is design to fulfill the following core requirements:
  • As a scripting interface for embedded systems.
  • As a cross platform scripting interface.
  • As a experimental tool for compiler construction.
LiteASM compiler is design with minimum static instruction set. Its dynamic instruction set can be easily extend using compilers configuration files. LiteASM compiler generate fixed length binary output file and it can execute on LiteASM Virtual Machine Simulator (litevm) or on top of platform specific virtual machine. Virtually LiteASM Virtual Machines can execute on any 8bit to 64bit CPU/MCU/DSP platform.

8bit version of Fibonacci series demo on LiteASM Virtual Machine Simulator

LiteASM compiler and Virtual Machine simulator are distribute as a free and open source software (under the terms of GNU GPL version 3.0) and available for both Windows and Linux operating systems. This LiteASM project is still in development and research stages and anyone can contibute to it through

Latest version of LiteASM compiler,  virtual machines, simulators and source codes are available to download at LiteASM – home page.