Nowadays, high-power light-emitting diodes (LEDs) LXHLMW1C are available in the market. These white LEDs contain indium-gallium-nitrogen (InGaN). The LEDs’ emitting capacity is 20 candela...

Small-size AA cells and button cells used in electronic devices providing a terminal voltage of 1.5V are normally rated at 500 mAh. As the...

This 9-Line Telephone Sharer circuit is able to handle nine independent telephones (using a single telephone line pair) located at nine different locations, say,...

In the output stages of most broadcast receivers and some amplifiers, there is a limit up to which maximum power can be developed without...

Here is a solidstate remote control switch which uses readily available electronic components. The control circuit comprises the transmitter and receiver sections. The range of...

Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for...

Here’s a digital stop watch built around timer IC LM555 and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926). IC MM74C926 consists of a...

Manual stabilisers are still popular because of their simple construction, low cost, and high reliability due to the absence of any relays while covering...

Here is a circuit that can be used in offices, stores, warehouses, etc during night to check whether the watchman of your establishment is...

Here is a simple, low-cost quiz table for four game participants. It determines the contestant who first presses the switch (S1 through S4) to...