TTL galvanic isolator for serial TX/RX lines 19200 baud maximum speedDesigned by TUTAN in Canada
What is it? This is a simple board to provide galvanic isolation between a standard FTDI BOB with 6 pins and a target device with a maximun speed of 19200 bauds. Only the TX/RX lines are isolated, ...Read More…
This is a simple board to provide galvanic isolation between a standard FTDI BOB with 6 pins and a target device with a maximun speed of 19200 bauds. Only the TX/RX lines are isolated, thus it is not intended for program downloading that requires the DTR line to reset the MCU and higher speed (typically 115200 baud for Arduino boards).
In many fixed installations the processor and the user interface are connected using a serial link (i.e. Arduino Firmata). The serial cable is permanently connected to both ends that can be separated by several meters. In noisy environments this may affect the reliability of the devices including the possible failure created by power spikes, ground potentials and other disturbances.
The purpose of this board is to avoid those potential problems using opto-couplers to provide galvanic separation between host and target.
The simplicity of this board allows a low-cost approach alternative to other commercial products, making it affordable for DIY fans. In addition to that the board is quite flexible regarding the type and placement of the connectors, making it easy to adapt to different requirements.
The board can be purchased in several versions:
If you prefer screw terminal blocks you may chose between two standard sizes (0.1"" and 0.2"). Note that each type has a different placement in the board, as indicated in the pictures.
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