DevHeads IoT Integration Server
The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.
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DevHeads IoT Integration Server
The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.
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Do I Need to Turn Off Thermal Relief When Adding Vias on a Ground Pad?
Guys I have a component with QFN package as shown in the picture. Is it okay if I add vias as shown (0.35mm outer, 0.2mm inner) on the ground pad, since I'm not able to route a trace inside? I believe I need to "turn off thermal relief" or something along those lines if I'm doing this. Can someone help me with this please? Thanks in advance @Joseph Ogbonna Can you please share your thoughts on this?
Is Adding Vias on the Output of a 3.3V Linear Regulator a Good PCB Design Practice?
Hey guys! [Please see picture attached ] Request you to comment on my idea of adding vias in my PCB design on the output of the 3v3 linear voltage regulator. Although there is no high current requirement, I still did this just to have a good design. Is this a good rule to follow?
Is my water monitoring draft okay, and do you have suggestions?
hello everyone i am trying to create a water monitoring and here is my draft is it okay or do you guys have suggestions? the ammonia sensor is temporary because I cant find a water based sensor for ammonia right now. I am new on iot btw
How does R41 affect AC measurement accuracy in my energy meter?
Hello everyone, Good day. While working on my energy meter project, i noticed that the accuarcy of measurement ( AC and AC voltage) increases or decreases with a change in the feedback resistor R41 as seen in the images above. The image above is for AC reading, i used the ZMCT103 current transformer with a turns ratio of 1000:1, I observed the following:
1) While using frame 2 and R41 as 5.1k ohms, getting an accurate current reading for loads as small as 60 watts was difficult. For a 60-watt load, the current at 220v will be 0.2727A, flowing through the primary, and with a turns ratio of 1000:1, the current at the secondary will be 0.2727mA. With the burden resistor R35 set to 150 ohms, the voltage across will be 40.9mV. The gain of the amplifier will be gain = Rf(R41)/ Rin(R37) in this case will be 5.1/22 = 0.2318. Now Vin = Vout/ gain, which makes Vout = Vin * gain = 40.9mV * 0.2318 = 9.48mV. R40 which is 22k gives the voltage an offset of 3.3v, which now makes Vout = 3.3v + 9.48mV = 3.30948v at the output of the op-amp which is further divided by 2 since there is a voltage divider at the output which now gives my voltage going to my adc to be 1.65v....
Urgent Review Needed for IoT Board Design with GPRS, WiFi, and Bluetooth Features
Hello everyone, I have a design I need to send to production tonight, the design just came in some hours ago.. It's an IOT board. In the firmware, I will use GPRS, WIFI, and Bluetooth. Please I just need a quick review, i would appreciate any pointers and adjustments. I am not through with the routing and placements yet.
Has Anyone Seen a Knob Design with a Wide Top and Narrow Bottom for Micro Synths?
Came up with a new 6mm knob design for a micro Synth I've been trying out. This works well for what I wanted (a bit more grip, and clearance from the other knobs below) but I keep thinking that something similar must exist already. I've looked around a bit, but has anyone seen a design like this, where the big part of the knob is on the top and the skinny part is on the bottom?
If not that's fine, but maybe I'm reinventing the wheel?...
