Electronics-Lab.com Blog

starlino.com writes:

In a previous article I have analized 3 accelerometer side by side comparing their noise level. Today I am going to test a 3 axis accelerometer from ST LIS331AL. I am going to compare it with the DE-ACCM2G accelerometer from Dimension Engeneering.

LIS331AL – ADXL322 Accelerometer benchmarks – [Link]

Very simple thermometer with PIC16F88, two LM35 sensors and KS0108 graphic LCD.

PIC16F88 LCD thermometer - [Link]

This project is a 2 channels amp meter. Those channels are completely isolated up to 2000 volts.It provides auto detection for AC or DC current. The main part of this project is the current sensor ZMC10 a cool DIP 14, which supports up to 10 A. The current is measured inside by hall effect sensor and display data using a graphic LCD of the read current and max peek value, DC or AC

Digital 2 channel 10 Amp Meter - [Link]

Justblair writes:

In the past, advice on forums has always tended more towards purchasing a second hand scope.  These tend to be had for around £100 on places like E-bay and most certainly will be a few years old if available at this sort of price.  Well that is changing and I was excited yesterday to get my hands on a “Scope” that may just re-write the forum advice.  Meet the Nano DSO from Seed Studio… [via]

Pocket Digital Storage Oscilloscope - [Link]

Everyone knows the problem: You have a transistor, but you can’t read its signature. Or you can’t find the datasheet… You have a diode, but… You have a capacitor, but you can’t read… Here is a smarty solution.

Features

* Automatic Detection of NPN and PNP transistors, N-and P-channel MOSFETs, diodes (including double diodes), thyristors, triacs and resistors.
* Automatic detection and reporting of the pins of the test component
* Detection and display of protection diodes for transistors and MOSFETs
* Determination of the amplification factor and the base-emitter forward voltage of transistors
* Measurement of the gate threshold voltage and gate capacitance of MOSFETs
* Show the values on a text-LCD (2×16)
* One-button operation, automatic shut-off
* Power consumption in off mode: <20 nA

This tester also supports diode measuring, R/C testing, and a lot of other components identifying. [via]

Component checker / tester - [Link]

Dimitris at users.otenet.gr/~meteo writes:

I make simple RF field strength meter to test the remote control from doors ,alarm e.t.c at frequency VHF-UHF, i used one μΑ meter ,2 diodes ,2 ceramic capacitors,a potentiometer,a box ,and one telescopic antenna. When I press the button at remote control,  there is small RF current  and with this meter it can be detected. In that way you can understand if the remote works.

Simple RF field strength meter - [Link] 

This Instructables details the construction of a PICAXE-based digital oscilloscope designed to meet most hobbyist’s needs and which can be built for under $100 (the author spent about $70 on his). Cost varies depending on what you might have on hand. [via]

DIY hobby o-scope - [Link]

For anyone interested in making they’re own laser rangefinder I’ve stripped down the original schematic to make it easier to understand and to adapt to your own robot. You can use any processor, laser and spinning mirror you want. See the attachment for a full sized schematic.

Homemade Laser Rangefinder - [Link]

DS1820 based digital thermometer with pic16f84

DS1820 based digital thermometer with pic16f84 - [Link]

In this project we are building a basic and low cost frequency counter circuit . It can measure from 16Hz to 100Hz signals with a maximum amplitude of 15V. The sensitivity is high, the resolution is 0.01Hz. The input signal can be a sine, a square or a triangle waveform.

Frequency Counter - [Link]