ESP8266 Community Forum

What is your pcb design program ?

trackerj wrote:When playing with analog I will suggest you to use a proper ADC/DAC for a decent accuracy.

MCP3421 I2C ADC : http://www.esp8266-projects.com/2015/04/18-bit-adc-mcp3421-i2c-driver-esp8266.html
MCP4726 I2C DAC : http://www.esp8266-projects.com/2015/03/mcp4726-12-bit-i2c-dac-driver-for.html
Pretty accurate DAC, as you can see also from this test: http://www.esp8266-projects.com/2015/03/mcp4726-12-bit-i2c-dac-driver-for_7.html

[quote="alonewolfx2"]What is your pcb design program ?

Mostly Eagle and DesignSpark PCB. Why? What are you using

It just make me remembered that I've some MCP3021 and MCP4725 sitting in my drawers. I've just soldered them on TSSOP adaptors like TrackerJ did ...

Very nice write-up hbouzas!
i used those 555 timers extensively in my misspent youth...
it reminds me of an ancient technique i put to good use many years ago,
if you really wanna really go bare-bones minimalist, it can be done with an even more primitive circuit -
using a comparator (or op-amp) and a sawtooth generator consisting of a constant current source ( 2 transistors like 2n4401 /3901 etc.. and 2 resistors ) to charge a capacitor, then reset that with a GPIO as necessary.
its surprisingly accurate.

cheers