Infrared (IR) Blaster – Circuit Wiring Diagrams IR Blaster. Introduction. An IR Blaster is a device that functions or imitates an IR Remote Control in its features. This device is used to control other devices. If this device is connected to a PC, it can be used to control all the other IR devices that are present in the room with the help of that PC. Manuals & Schematics - HornBlasters HornBlasters Instruction Manuals and Schematics. Lose your manual or want a digital copy? We got your back! Most manuals are provided in Adobe PDF format only.