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bdutta74
  • Member for 12 years, 7 months
  • Last seen more than a month ago
30 votes
7 answers
32k views

Least expensive way to boost DC voltage

22 votes
3 answers
6k views

Dual-SIM phone, do they use 2 GSM modules ? Anyone has high level schematic?

15 votes
4 answers
21k views

Is it okay to keep a mobile phone connected to its charger, 24 hours a day, 7 days a week?

14 votes
2 answers
27k views

Converting passive USB Hub to powered USB Hub, by adding regulated wall-wart as power supply?

9 votes
1 answer
28k views

WiFi module says "mini PCI-e format" with "USB host interface" - what does this mean?

9 votes
2 answers
5k views

USB host-mode on uC, to support small pre-defined set of USB devices

9 votes
2 answers
3k views

Collimating a sonar beam

8 votes
5 answers
6k views

Water level detection, where water is somewhat polluted and has significant dissolved salts

7 votes
4 answers
12k views

Specific color sensing, is it possible in an economical way, without using camera/image recognition?

7 votes
4 answers
13k views

Avoiding echo/feedback on speaker-phones, how?

7 votes
5 answers
4k views

What are viable approaches to a circuit to detect wet/moist cloth (bed-wetting)?

6 votes
5 answers
13k views

Circuit to remove noise from digital communication line

6 votes
1 answer
5k views

Lithium-ion rechargeable battery, shelf life

6 votes
2 answers
4k views

How does one determine Lead-Acid battery end-of-life?

6 votes
2 answers
3k views

mATX motherboard JFP1 header: Does not require pull-up or pull-down resistors, right?

5 votes
5 answers
5k views

How to power a circuit that needs +9VDC, GND, -9VDC?

5 votes
3 answers
12k views

Detecting dry-running of water pump

5 votes
4 answers
9k views

Checking maximum current provided by charger, how?

5 votes
1 answer
26k views

Battery management circuit for Nokia BL-4C / 5C Li-ION batteries

5 votes
2 answers
2k views

Electronically controlled pneumatic lift, or something similar

5 votes
2 answers
7k views

Resonant frequency of piezo elements, and generating multiple tones

4 votes
2 answers
372 views

Can pins (breadboard friendly) be added to non-drilled pads?

4 votes
2 answers
977 views

Reliable secondary storage for Raspberry Pi (or other such single-board computers (SBCs))?

4 votes
2 answers
2k views

For switching 220VAC, is a specific coil voltage and coil resistance better than another?

4 votes
4 answers
2k views

What happens to other component's power consumption, when uC is switched to low-power mode

3 votes
2 answers
4k views

Getting 5VDC from 6V (4S 1.5V AA alkaline batteries)

3 votes
2 answers
467 views

For 3.5" mini stereo (TRS) to RCA stero cable, are any passive/active components used?

3 votes
1 answer
2k views

Detached antenna and connecting wire length

3 votes
1 answer
3k views

RFID coil - ends broke, can I resolder?

3 votes
3 answers
11k views

Choosing relay to operate water pump