[time-nuts] Nulsom RS-232 for TTL conversions

Gregory Beat w9gb at icloud.com
Sun Sep 9 14:45:16 EDT 2018

An Easy Approach for TTL (3.3V or 5V) to RS-232 conversion, 
that fits INSIDE the DE-9 back shell.
These Korean modules are popular with Arduino and AVR/ATmega users.

Nulsom, Inc. (Korea)
Available for purchase on Amazon, $9.95 USD 
Yes, I bought a couple, earlier this summer.

The Nulsom NS-RS232 converter can operate at a data rate of 235 Kbps (230,400bps).
The drivers can guarantee a date rate of 120Kbps (115,200bps) fully loaded with 3KΩ in parallel with 1,000pF, ensuring compatibility with PC-to-PC communication software.
Available with DE-9F (-01 option) or DE-9M (-02 option).

- Convert TTL (Transistor-Transistor Logic) level signals to RS232 interface
- DE-9 connector (Male or Female) mounts inside back shell (RS-232)
- Supports 3V ~ 5.5V power supply (Use on your 3.3V and 5V projects)
- RTS, CTS (control lines) also available on circuit board (5-wire RS-232 support)

Nulsom NS-RS232 User Manual
Digi-Key sells nice “hinged” or “one-piece” back shells.
Such as the NorComp 972 series

greg, w9gb
Sent from iPad Air

More information about the time-nuts mailing list