This circuit diagram is taken from the Linear Technology application notes. A low-loss way to carry out a”glitch-free” battery backup for a memory or similar circuit is shown on the following schematic diagram. To make LT1020 does not conduct under line-powered conditions, we have to arrange the feedback string. The line LT1020 begins to go [...]
In some applications, to monitor the battery voltage can be important. Some battery monitor will be simply a continuous LED lamp which is dimming according to the voltage level. The following figure presented monitoring circuit that flashing, which is more noticeable than simply dimming the light intensity. The flashing rate will increase as the voltage [...]
This circuit diagram from National Semiconductor’s Application Note. It is two wire light level detector, the wires are not separated for power this sensor system and for delivering the output signal. With current loop, both function in a single pair of cable is done, just provide the voltage supply and measure the current as the [...]
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