In this post we learn how to make a simple variable power supply circuit using transistor 2N3055 and some other passive components. It includes variable voltage and variable current feature, […]
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Highly Sensitive Mobile Phone Detector Circuit
A cellphone or mobile phone detector is actually a high gain op amp amplifier which detects slightest of RF disturbance from a mobile phone, and illuminates an LED. NOTE: This […]
GSM Based Cell Phone Remote Control Switch Circuit
This circuit will allow you to control any electrical gadget from any part of the world through your cellphone remotely, that too without spending a penny for the individual commands. […]
Make this Wireless Speaker Circuit
The article explains a very simple circuit of a wireless speaker system which can be used for playing hi quality music wirelessly from your TV set, DVD player, Ipod, cell […]
Non Contact AC Phase Detector Circuit [Tested]
The circuit discussed in this article is of a non-contact mains AC field detector which displays the presence of a mains AC field from a distance of more an 6 […]
Build Simple Transistor Circuits
A compilation of important assorted transistor simple circuits to build has been included here. Simple Transistor Circuits for New Hobbyists Many simple transistor configurations like, rain alarm, delay timer, set […]