A timer-controlled doorbell device has been developed using two 555 timer ICs in monostable mode, combined with a relay ...

Let’s Look at the Schematic In a PWM circuit, the 555 timer will output a logic signal “high” and “low” depending on a ratio derived by the value of a few components connected.

November 1, 2011. The new Remote Instrumentation Controller 4000 (RIC-4000) for ASSET’s ScanWorks® platform for embedded instruments can connect over an Ethernet network and apply ...