A milliamp meter can be used as a volt meter by adding a series resistance. The resistance needed is the full scale voltage reading divided by the full scale current of the meter movement. So, if you have a 1 milliamp meter and you want to read 0-10 volts you will need a total resistance [...]
This alarm circuit is an anti- theft wireless alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF FM radio-controlled, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park. The receiver unit of the wireless alarm uses [...]
This electronic circuit is an alarm circuit for low battery condition. It provides an audible and visual low voltage warning for 12V battery powered devices. When the battery voltage is above the set point (typically 11V), the circuit is idle. If the battery voltage should fall below the set point, the LED will light and [...]
This power supply circuit uses a LM338 adjustable 3 terminal regulator to supply a current of up to 5A over a variable output voltage of 2V to 25V DC. It will come in handy to power up many electronic circuits when you are assembling or building any electronic devices. The schematic and parts list are [...]
This circuit is a digital voltmeter with LED display. It’s ideal to use for measuring the output voltage of your DC power supply. It includes a 3.5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199.9V with a resolution of 0.1V. The voltmeter is based on single ICL7107 chip [...]
Electrical technology has been greatly enhance with the introduction of wireless communication. Wi-Fi is the one among the achievements. The term Wifi stands for Wireless fidelity. Wi-Fi is a brand originally licensed by the Wi-Fi Alliance to describe the underlying technology of wireless local area networks (WLAN) based on the IEEE 802.11 specifications. It was [...]
LM3886 68W Power Amplifier Circuit Diagram LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 468W Power Amplifier with LM3886 circuit load and 38W into 868W Power Amplifier with LM3886 circuit with 0.1% THD+N from 20Hz-20kHz. Features: Maximum Output Power : 68W RMS – 108W Peak THD [...]
