The post explains how accurate delay timers using NOT gates can be built easily with the help of ICs such as IC 4049 and generate reproducible delay features from these […]
Thermal Indicator Circuit for Heatsinks
The post details how to build a simple 3 LED thermal indicator circuit for heatsinks and other similar applications to quickly understand the level of heat on the selected surface […]
Doorbell With Memory Circuit
On occasion this could be helpful to understand when a potential user has visited your door steps as part of your absence. This is especially valid in the circumstance of […]
Door Lock Circuit using Digital Code
In this post we try to analyze a simple door lock circuit using digital code that needs to pressed with a unique sequence in order to activate the door lock […]
Car Lights ON Warning Circuit
The article explains how to build a simple car lights ON warning circuit for enabling the driver to learn about the a car light accidentally left switched ON after a […]
Simple Temperature Indicator using BC547 Transistor
The post explains a simple temperature indicator circuit using a single BC547 transistor and complementary 1N4148 diode. The temperature indication of a heat sink on a power transistor in high […]