Metal Detector

This  Metal detectors will detect ferrous (iron, steel, stainless steel) as well as non-ferrous (copper, tin, gold, lead, silver, aluminium) as well as alloys (brass, cupro-nickel, pewter etc). Depending on the complexity of the circuit, a metal detector will be…
The Capacitor-fed Power Supply

The   capacitor-fed power supply is sometimes referred to as a TRANSFORMERLESS POWER SUPPLY. This article is going to shock you because it is going to tell you all the reasons why you should NOT design, produce or use a CAPACITOR-FED…
LED Tester

This. project is very simple. It is just a 4.5v supply with a LED and resistor in series. When the two probes touch they complete the circuit and the “test LED” (the red LED) will illuminate. When the probes are…
1 watt LED Lamp

This circuit is an extension of the 1-watt LED Driver project. It is a very clever circuit and will illuminate up to six 1-watt LEDs or 30 white LEDs to give an overall illumination of about 1 watt. The 1-watt…
1 watt LED Driver

This circuit will drive a 1 watt LED from 1 or 2 cells (commonly called “dry cells”). The circuit consists of only 4 components plus a LED and the secret to its operation is the transformer. It is operated in…
2015 Predictions

Satinder Sohi, India Country Director, Freescale Semiconductor India Pvt. Ltd. In 2015, it will be interesting to see is how trends like Internet of Things, big data and cloud will combine to enable a smart planet. We believe CIOs will…