Thanks in advance,
Explore... Chat... Share...
g6ejd wrote:The espressif data sheet does not give a specification but it says all inputs have a leakage current to maintain an input state of 50nA and you should expect input impedance of any ADC to be high. using 50nA and 1volt maximum input allowed yields 20Mohm which sounds about right to me.
However which ESP8266 implementation are you using because many boards like NodeMCU or WemoS D1 have input resistor diver chains to allow 0-5 inputs and effectively divide that input range down to 0-1volt for the ESP, in which case the input impedance of these boards would be much lower. The Wemos D1 mini for example has a 220K and 100K series divider giving you an input impedance of < 100Kohm.
as rudy allready mentioned: don't use jumper wir[…]
Thanks so much! I'll get to work :)
To illustrate the novel practicality of mmiscools […]
with the infos from ...\\esp8266\variants\nodemcu\[…]
Beta version (v2.2.2) of Unofficial Development […]
What is the latest version of the Arduino IDE that[…]
Would you be so kind as to show me your wiring as […]
Yes momentary switch to ground will work. GPIO0 […]
Many people have used my webpage info/files succ[…]
I bought 50 programmable NFC tags not to long ago […]
Yes, 2.2K pull-up resistors on the SDA and SCL lin[…]
I tried your sketch as is, no changes, and it work[…]
Hotspot is probably 5Ghz, while the other one it w[…]
Hi, I'm trying to compile a piece of code using Pl[…]
hi, I have a simple sensor done with a node-mcu ([…]
I am using nodeMCU v2 board. I am using arduino ID[…]
Try arduino --board esp8266:esp8266:node[…]
I'm having what I think is the same problem. I've[…]
Hello, I am struggling with my new NodeMCU ESP826[…]
Whatever happened to lew247? He posts a question […]