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Active supercapacitor balancing for shortterm UPS
Hi, i am designing short term (>60sec of backup) UPS circuit based on supercapacitors for my low power i3 intel computer (12V, 5W). All i need is to provide safe turn off for...
Monday, 28 March 2022 - 09:34
Noisy earth connection
Hi,   i am embedded electronics developer and my company recently moved to a new location. Here we rent a floor in multi store building and the owners has 9x 20kW...
Tuesday, 22 March 2022 - 13:42
VCC and analog VCC differences
Hi, i am making custom board with ATSAMD21G18 and so far, i have around 50 final products sold and all the feedbacks are great. Now i am preparing 2nd gen of PCB and i wish...
Tuesday, 22 June 2021 - 10:35
Cant get sensor to return ACK on I2C
Hi, i am trying to get STM32F301K8 to communicate with VL6180V1 ToF sensor on my custom board, via I2C (at 20kHz) I had problem getting the API to work so i tried low level I2C...
Monday, 14 June 2021 - 13:56
Reading 5V polarizing output
Hi, i have a 5V powered keypad and keylock set. When you enter the correct password in keypad, it then either locks or unlocks the lock, by applying 5V in one direction or...
Monday, 17 May 2021 - 13:22
LCD burn in prevention
Hello,   i designed a product that includes an 2.4 TFT LCD (dt022ctft) and now i have approximately 50 to 60 products in the field for about a year and a half and on some of...
Thursday, 7 January 2021 - 12:12
Slowing dow nAc motor in a fan
Hi,   i have one of those classic white fans on stand for room. It has 3 speeds, but they are all waaaay to fast and now im thinking about how to reduce speed of the motor...
Monday, 1 June 2020 - 08:30
ADUM1250 bi-dir isolator
Hi,   i have an eeprom on my PCB that i wished to additionally protect, so i put it in isolated circuit. So i added a isoalted DC/DC 3.3V to 3.3V converter (1W), and a...
Monday, 11 May 2020 - 08:25
Where to find RGBWW bulbs
Hio,    im making some light decoration for my home and outsides and i am trying to be "fancy" and "over complicate" things, like a true engineer. So i am looking for a...
Wednesday, 6 May 2020 - 08:32
Manual pick/palce machine for under 1000€
Hello,   i am looking for a manual pick/place machine for under or around 1000€, preferably sold in EU. Only one i found that looks nice at this price range is ...
Friday, 24 April 2020 - 10:43
Circuit breaker switch extender
Hi, i am looking for small metal rod that extends switch on the circuit breaker and i dont know how is it called in English.  I marked exactly what i mean on the attached...
Monday, 6 April 2020 - 10:13
Measuring 230V AC current (contact-less) with 5V AVR
Hello,   i need to measure current(power) on a 230V AC power line, without soldering anything onto the line itself. The power draw is from 10 to 100W so lets say max 0,...
Thursday, 12 March 2020 - 11:33

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