: If Proteus was open, you must restart it for the new components to appear in the "Pick Devices" (P) list. Simulation Wiring Guide
: Each of the four channels can be toggled individually via digital pins (IN1, IN2, IN3, IN4). 4 channel relay module library for proteus new
: Obtain the library files (usually .LIB and .IDX formats) from a trusted source such as the Electronics Tree Download Page . : If Proteus was open, you must restart