Electrical Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 7

PCB Design Specification Document

My company has been designing PC boards since the early '80s. However, we haven't formalized our PCB Design procedures or preferences. Things like preferred PCB sizes, preferred location...

Asked on 12/26/2021 by Dwayne Reid

1 answer

How is possible reading analog input and logging the data to SD card for this STM32 board?

I'm very beginner in STM32. I have STM32F746G discovery board. This board has microSD slot. I want to read three analog channels and log these voltage data...

Asked on 12/26/2021 by cm64

1 answer

Fine-pitch SMD pads on flex PCB using coverlay rather than soldermask

SMD: "Solder-Mask-Defined" NSMD: "Non-Solder-Mask-Defined I am making a thin flex-PCB (0.2-0.3 mm) on which I am going to mount a component which has SMD pads. I would like to also...

Asked on 12/26/2021

0 answer

Give a second life to a 18650 battery cell, which has 0.1 V?

I have a 7.4V battery pack consisting of 2 x 18650 cells.One of them has 3.4 V, so I tried to charge it with a good old...

Asked on 12/26/2021

0 answer

Bldc motor braking

Which type of braking is most suitable for bldc motor?Plugging or dynamic or degenerative braking.For motion control application....

Asked on 12/26/2021 by TEC HUB

1 answer

Crimping multiple wires to a single crimp

I need to connect a power supply to a device. The power supply provides 24V on a 2-pin Molex Mini-Fit Jr. header. The device has a 9-pin female D-Sub connector...

Asked on 12/26/2021

1 answer

Cockcroft voltage multiplier - Stages not building up voltage

We are trying to develop a Cockcroft voltage multiplier that is getting input from IC555 astable driver circuit. The circuit diagram for driver and multiplier is as shown below....

Asked on 12/26/2021 by XatCens

3 answer

Converting 6c (3s2p,4.5v) DC motor to 1s4p 18650 charging/protection

I am having a hard time figuring this one out. I am trying to convert a 4.5 V, 25 W DC fan from an air mattress pump to run off...

Asked on 12/24/2021

1 answer

Boost converter to high voltages (20 kV+)

I am interested in making a mini, potentially portable ion thruster. The Question: Is it possible to create a boost converter that takes low voltage batteries ranging from 3.7 V...

Asked on 12/24/2021 by The Amateur

1 answer

Electric field strength from AC conducting wire in form of a loop along z-axis?

Let's say I want to calculate the electric field strength from an AC conducting wire, with a certain frequency and current. The wire is in the form av a loop....

Asked on 12/24/2021 by Defindun

3 answer

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