Two years ago I published post about Remote controller with PCA9535. This device was not without some disadvantages, of course. Some of them: not accurate board outline, IQRF module orientation, through-hole push buttons. Now I have finished new version with some improvements, which replaces disadvantages mentioned above.
I’ve used the AD converter several times in my articles, but you could be in situation, when you need more ADCs, or you have not enough IO ports. In these situations an external AD converter is suitable choice. I tested MCP3021, cheap and simple ADC worked on I2C bus. More inside… Continue reading