i am trying to interface a bunch of gas sensors with esp32 with voltage source as hw-131 the ic ams1117 ic gets heated up do you know whats the reason for this , Gas sensors are mq9
Read the specifications regarding the current consumtion of the gas sensors and the spec for the voltage source and see what it can deliver. Especially look for an eventual need for heatsink.
Dinakaranevil:
i am trying to interface a bunch of gas sensors with esp32 with voltage source as hw-131 the ic ams1117 ic gets heated up do you know whats the reason for this , Gas sensors are mq9
"A bunch", how many is that?
And how are you powering that HW-131 breadboard supply (voltage).
Power (heat) generated in linear regulators is voltage drop times current draw.
Each MQ9 sensor draws about 150mA.
If... you use a 9volt regulated supply, then one sensor would generate (9volt-5volt)*0.15A= 0.6watt in the AMS1117 regulator. Enough to get it rather hot.
Power the ESP32 (~100mA) also from the breadboard supply, and things could get smoking.
Why don't you power the sensors (and ESP) directly, with a 5volt cellphone charger.
Leo..
Wawa:
"A bunch", how many is that?
According to this:
It varies. It is totally dependent upon the buncher and how many items he/she/it thinks should be bunched into the bunch.
Dinakaranevil:
i am trying to interface a bunch of gas sensors with esp32 with voltage source as hw-131 the ic ams1117 ic gets heated up do you know whats the reason for this,
Yes, the reason is perfectly well known. The "HW-131" is indeed a voltage source, but not a power supply. The regulator has no heatsink at all.
To heat a single MQ9 at 5 V, you need 150 mA. The most practical power supply for this would be a USB "Phone Charger" - most current ones will be able to supply 2.1 Amps so would be able to power at least ten MQ9 devices. You would of course use the same 5 V to power the ESP.
fishboneDiagram:
According to this:
It varies. It is totally dependent upon the buncher and how many items he/she/it thinks should be bunched into the bunch.
in orders of quantities
a, one, single, a unit..
a pair, dual, couple
a few
a bunch
a lot
so, a bunch falls between a few and a lot.
just thought we could clear that up.