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Simple Morse Code Trainer

Petre Petrov, Assistant Professor, Technical University of Sofia
Morse code contests are still held in some parts of the world. Practising the Morse code with a simple Morse key kit is interesting. The...

“India is An Emerging Platform for Design Implementation”

EFY Bureau
Vasudevan Aghoramoorthy, vice president, Semiconductor and Systems, Wipro Technologies, spoke to Dilin Anand and Jalaja Ramanunni of EFY about Wipro’s presence in India, how...

Where Do Open Source Engineers Fit in the Electronics Industry

EFY Bureau
Freeduino board It has been believed for years that a prominent part of the future of Open Source lays in embedded systems—a “rather unglamorous...

WHAT IT TAKES TO BE A GOOD EMBEDDED ENGINEER?

EFY Bureau
The definition of embedded system has broadened over the years. The initial definition said that an embedded system is anything that is application-specific, but,...

MULTI-SWITCH DOORBELL WITH INDICATORS

T.K. Hareendran, Electronic Design Freelancer, AspenCore
Here’s the circuit of a multi-switch input musical doorbell (shown in Fig.1). The circuit is built around the popular and less expensive quad D-latch...

Traffic Baton

EFY Bureau
In small towns, there are no traffic lights and the police regulate the traffic with hand signals. Since their hand signals may not be...

Traffic Controller

EFY Bureau
This simple traffic controller can be used to teach children rudiments of traffic rules. The circuit (shown in Fig. 1) uses readily available components. It...

Build an Automatic Fan Speed Controller with 555

Suresh Dwivedi
During summer nights, the temperature is initially quite high. As time passes, the temperature starts dropping. Also, after a person falls asleep, the metabolic...
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