HS1101 Humirel Humidity Sensor

Other Hardware Sensors
1

Can the HS1101 Humirel Humidity Sensor be used with a Uno without having to build a 555 timer circuit?
Thanks

2

Don't know the sensor, do you have a link to the datasheet ?

3

is it this: Humirel HS1100 datasheet pdf ?

u could generate the a square wave with fixed frequency on a pin and
connect it via a 100k resistor to the HS1101 and
measure the maximum voltage with an opamp and a diode and a capacitor and a decharging resistor...

but there will be several temperature depend things:

  1. the cpu frequency
  2. the ADC reference voltage
  3. the opamp

i dont know if a circuit with the 555 has a stronger temperature drift...

4

Not the most easiest sensor, needs extra electronics.

Have you considered the DHT22, doesn't need extra electronics?

lib for DHT22 / DHT11 see - Arduino Playground - DHTLib -

5

HS1101 data sheet http://www.datasheetcatalog.com/datasheets_pdf/H/S/1/1/HS1101.
I have one DHt22 and two on order, I think I will use them. Just thought the HS1101 would be more accurate, but not worth the extra circuit work. Thanks for the reply's.

6

Actually, you can do it without a 555, I got one working in this thread: Using an HS1101 humidity sensor - #6 by wildbill - Sensors - Arduino Forum