$25–45 USD. If you see a $5 dongle, it’s almost certainly a CIR (Consumer IR) remote receiver, not an IrDA data adapter.
| Use Case | Details | |----------|---------| | | Download logs from older oscilloscopes, multimeters, patient monitors (Philips, Siemens) with IR ports. | | Legacy Mobile Sync | Sync contacts/calendar with Palm OS, Windows Mobile 2003/5, Symbian (Nokia Communicator). | | DIY / Retro Computing | Transfer software to vintage laptops lacking USB but having IrDA (ThinkPad 600 series, Toshiba Portégé). | | Point-to-point OT transfer | Direct IR link between two PCs (IrNET) – no cables, no network setup. | | Set-top box / TV programming | Update firmware on older satellite receivers or DVD recorders. | u2irda mini 4 mbps fir usb irda 20 portable
: Often utilizes chipsets like the Sigmatel STir4200 or MosChip/ASIX MCS7780 . Compatibility and Drivers $25–45 USD