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Results tagged with power
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user 97978
Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt (one joule per second). Use this tag where power is a primary concern for the design under discussion. Use the "low-power" tag when that applies.
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LCD not powering up on a breadboard - is the wiring correct?
I'm trying to power on a LCD on a breadboard. For some reason, the LCD is not turning on (No backlight). … I haven't wired the data lines yet because I can't even get this LCD to power up.
The LCD was bought 2 days ago, so while not impossible, it's very unlikely this is defective. …
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Good method to provide small additional voltage while on battery?
The circuit works when the power is connected to the wall, which gives a constant 9V DC to Solenoid Power V+.
I also have a battery backup circuit implemented that looks like the following. … When the wallwart is disconnected, the power from battery kicks in. The problem is I'm using 6 x AA rechargeable batteries, giving about 7.2 voltage. …
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A good way of providing 9V/5V voltage with batteries when current draw is relatively high?
I'd like to provide the power with a battery, so I was initially thinking about getting a 9V battery to provide power to the solenoid, and use a LM7805 regulator to provide 5V to MCU, LCD and Keypad. … I'm trying to make a battery backup system pretty similar to shown here (http://www.electroschematics.com/6279/battery-backup-circuit/), so that the doorlock is kept in operation if the AC power dies out …
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