FLASHER FOR DEEPAWALI
Here is the circuit for a portable electric lamp-cum-LED flasher. It uses a 25W, 230V AC bulb and nine LEDs. When the bulb glows...
T&M Equipment: Why Is Regular Calibration Important?
Calibration defines the accuracy and quality of your measurement. But just buying a certified, calibrated equipment is not the answer; you need to service...
ELECTRONIC METRONOME
A metronome is used by musicians for practice in maintaining a consistent tempo, or rubato, around a fixed beat. This circuit produces a regular...
RFID Testing Challenges For Complex RF Environments
A brief overview of RFID technology and testing challenges for complex operating environments where throughput and communication issues may be caused by multiple readers,...
Keep Away NI-CD From Memory Effect
Ni-Cd batteries suffer from an undesirable memory effect due to partial discharge. The remedy is to completely discharge the battery before recharging.
A simple resistor...
Timer From Old Quartz Clock
You can build an accurate, low-cost timer from the circuit of an old quartz clock. This timer has a time duration of up to...
IR-Controlled Water Supply
This circuit can be used in homes or small restaurants for any type of water supply unit, such as toilet flush or washbasin tap.
The...
ELECTRIC GUITAR PREAMPLIFIER
Here is the circuit of a guitar preamplifier that would accept any standard guitar pickup. It is also versatile in that it has two...
T&M in Mission-Critical Aerospace and Defence
As public-private partnership in aerospace and defence catalyses indigenous design and manufacturing, test and measurement holds great potential from design to delivery in the...
Simple Key-Hole Lighting Device
When opening the door of your room in the dark, you may have to spend a few minutes searching for the key-hole. Here is...
