27 thoughts on “ Mechanical Relay Logic That Was Snubbed For A Microcontroller ” EccentricElectron says: July 30, 2012 at 11:17 am ELEGANT. Report comment. Reply. rkward says: ...

Adorned with its plethora of clicking relays and set aglow by four Nixie tubes, the Relay Logic Nixie Tube Clock checks all our boxes. [Jon] started the build with relay modules that mimic CD4000 ...

Even when utilities do tailor relay logic, if the programming isn’t completed properly, it can lead to a wide range of protection system problems including repeated and unnecessary system shutdowns.

The arrangement follows so-called “relay logic,” which was usually presented in a schematic as a ladder diagram. (See Fig. 3.) In a tube-type transmitter, the control system usually starts with a ...

When the count reaches 9 (binary 1001), relay logic shunts the clock to a reset relay. The reset relay generates a pulse on the reset bus and cuts the power to all the bit-bearing relays. The reset ...

Ladder logic uses switch or relay contacts to implement Boolean expressions. In years past, ladder logic was made possible with discrete relays and was sometimes termed “relay logic.” Today most ...

Relay logic, as simple as it is, can cost you a lot of troubleshooting time. Project and contract engineer Joe Stack paid homage to the relays, shown in Fig. 2. A phasor controller on which he had the ...

When controlling relays via logic etc. it is far easier to interface to the low-side driver. For low power relays, a 2N4401 is a good choice (Fig 3). If you desire to drive a larger relay or want less ...

The logic and expansion I/O in MMRs can add a number of functionalities that go beyond its embedded firmware. Most industrial facilities include electric motors that require overload relays for ...