linux-works
DIY: LCDuino-1 and dual port latching relay attenuator
each port expander (PE) has its own debug bargraph led chip (right). to latch the relay, write 'x' and 'binary-invert-x' to the 2 PE's. each relay will then be clicked into the '0' or '1' position.
NB: this is not what the final product will look like (lol). it is very handy to be able to see the byte values of the PE chips and so I soldered the display chips directly to the back of the board. not recommended as a general soldering technique but it does seem to work ;)
DIY: LCDuino-1 and dual port latching relay attenuator
each port expander (PE) has its own debug bargraph led chip (right). to latch the relay, write 'x' and 'binary-invert-x' to the 2 PE's. each relay will then be clicked into the '0' or '1' position.
NB: this is not what the final product will look like (lol). it is very handy to be able to see the byte values of the PE chips and so I soldered the display chips directly to the back of the board. not recommended as a general soldering technique but it does seem to work ;)