Relay Driver with Strobe

LM111 comparator can be used o design a relay driver with TTL strobe, this can be used to provide more control of your relay driver. You can control the strobe input using a microcontroller or other  digital signal. Here is the schematic diagram of the relay driver: [Source: National Semiconductor Application Note]

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Digital Transmission Isolator

Digital transmission isolation is important for keeping the digital noise to reach the analog path, that’s the benefit for noise isolation. For electrical isolation, isolating the signal after digitizing is often easier since digital signal is inherently nonlinear, no need for linear device to transfer.  You can use the following circuit for many purpose: [Source: National Semiconductor Application Note]

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