User Codebeat

10 votes

1 answer

1k views

What is the technical difference between audio CD-R(W) and data CD-R(W) discs?

asked Jul 3 at 2:13

8 votes

3 answers

990 views

Analyze protocol used for Futaba VFD display, 3 data pins

digital-logic identification display protocol logic-analyzer

asked Apr 1, 2020 at 22:54

7 votes

2 answers

230 views

Why batteries need to be custom and smart nowadays?

batteries standard custom smart industial

asked Dec 25, 2017 at 21:06

6 votes

2 answers

972 views

Fake a panasonic battery to revive camera to copy photos from internal memory

power battery-operated camera data-storage emulation

asked Dec 18, 2017 at 20:10

6 votes

1 answer

568 views

What's the name of this nice spring contact?

connector components identification pins

asked Apr 11, 2018 at 22:37

5 votes

3 answers

4k views

MT3608 gets very hot only handle 1A

current dc dc-dc-converter boost overheat

asked Jun 29, 2019 at 1:03

4 votes

1 answer

478 views

What are these coil components with three legs?

components identification coil

asked Mar 17, 2017 at 20:29

3 votes

1 answer

174 views

Any device with audio jack as UI

arduino audio attiny button prototyping

asked Sep 7, 2016 at 4:30

2 votes

3 answers

2k views

MP1584 DC/DC step down converter cause whine in audio, how to avoid?

audio dc-dc-converter step-down distortion

asked Dec 12, 2015 at 19:44

2 votes

1 answer

21k views

JL (or maybe something else) misterious branded IC's, what is the origin? [closed]

integrated-circuit components identification microprocessor manufacturing

asked Apr 9, 2018 at 3:00

2 votes

3 answers

1k views

Replace/refresh 7 segment display of vintage 80's clock radio

led identification repair 7segmentdisplay replacement

asked Sep 10, 2019 at 5:03

1 vote

2 answers

343 views

Can a trim-pot wiper or contact point gets oxidized over time?

current resistance heat potentiometer

asked Aug 15, 2019 at 5:47

1 vote

2 answers

246 views

What is the exact name of this type of transformer?

audio transformer identification isolation ground-loop

asked Mar 16, 2018 at 4:14

1 vote

2 answers

738 views

BA3121: Ground loop supression is great however very thin audio quality

audio integrated-circuit datasheet ground-loop

asked May 6, 2018 at 21:53

1 vote

1 answer

4k views

Why is the usb shield always tied to ground (GND pin)?

usb connector grounding shielding ground-loop

asked Nov 1, 2018 at 18:21

1 vote

0 answers

109 views

What is the name of these colorful connectors?

connector identification speakers

asked Apr 27, 2019 at 20:30

1 vote

3 answers

3k views

Digital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot)

arduino audio resistance opto-isolator optoelectronics

asked Oct 30, 2016 at 16:03

1 vote

1 answer

1k views

Philips 26PF5321 backlight mod, dim backlight

voltage led inverter tv backlight

asked Mar 28, 2017 at 5:05

1 vote

1 answer

153 views

Can a low current device be damaged by a high current device when in parallel?

current components parallel high-current damage

asked Apr 19, 2017 at 0:12

1 vote

3 answers

829 views

SSD1306 I2C: Draw only changes works however on wrong position, how to set position (command)?

avr i2c oled position update

asked Oct 18, 2017 at 19:36

1 vote

3 answers

996 views

Three different schemes to amplify audio input, which one is correct?

arduino audio voltage-divider input

asked Mar 2, 2017 at 17:58

1 vote

2 answers

144 views

What is this circular rod with wired wrapped 'coil' and ceramic capacitor?

capacitor components identification coil ferrite

asked Mar 7, 2018 at 23:57

1 vote

1 answer

469 views

Replace amplifier IC with a class D amplifier (AN7133N with TPA3116 board)

power-amplifier vintage class-d replacement

asked Apr 24, 2020 at 4:22

1 vote

2 answers

604 views

Vacuum Fluorescent Display: What are the benefits of an AC filament driver instead of DC?

ac dc driver display vacuum-fluorescent

asked Jun 11, 2020 at 21:48

1 vote

1 answer

105 views

-30V power supply for HTS6520

power-supply negative-voltage replacement vacuum-fluorescent

asked Oct 6, 2020 at 3:35

0 votes

1 answer

76 views

Feature 'logo/labels' on cases of self made devices

bluetooth device markings generic semiconductor-process-technology

asked Nov 4, 2020 at 7:14

0 votes

1 answer

110 views

Panasonic RX-DT860 mod, how to unmute audio signal?

analog audio output input reverse-engineering

asked Sep 26, 2021 at 13:21

0 votes

4 answers

766 views

uln2003a: Switching ground of device works, however, optional USB function of device doesn't work correctly

switches usb-device darlington usb-host uln2003

asked Mar 13, 2018 at 14:47

0 votes

2 answers

3k views

Attiny85, reading analog values from PIN3, reports 654 on idle?

arduino analog button c++ attiny85

asked Jun 23, 2016 at 3:05

0 votes

1 answer

927 views

Where can I find a datasheet/info of/on this "music speakers" 35 segment LED display with 7 legs? [closed]

led datasheet display 7segmentdisplay

asked Aug 1, 2017 at 3:16

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42 Questions

What is the technical difference between audio CD-R(W) and data CD-R(W) discs?

Analyze protocol used for Futaba VFD display, 3 data pins

Why batteries need to be custom and smart nowadays?

Fake a panasonic battery to revive camera to copy photos from internal memory

What's the name of this nice spring contact?

MT3608 gets very hot only handle 1A

What are these coil components with three legs?

Any device with audio jack as UI

MP1584 DC/DC step down converter cause whine in audio, how to avoid?

JL (or maybe something else) misterious branded IC's, what is the origin? [closed]

Replace/refresh 7 segment display of vintage 80's clock radio

Can a trim-pot wiper or contact point gets oxidized over time?

What is the exact name of this type of transformer?

BA3121: Ground loop supression is great however very thin audio quality

Why is the usb shield always tied to ground (GND pin)?

What is the name of these colorful connectors?

Digital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot)

Philips 26PF5321 backlight mod, dim backlight

Can a low current device be damaged by a high current device when in parallel?

SSD1306 I2C: Draw only changes works however on wrong position, how to set position (command)?

Three different schemes to amplify audio input, which one is correct?

What is this circular rod with wired wrapped 'coil' and ceramic capacitor?

Replace amplifier IC with a class D amplifier (AN7133N with TPA3116 board)

Vacuum Fluorescent Display: What are the benefits of an AC filament driver instead of DC?

-30V power supply for HTS6520

Feature 'logo/labels' on cases of self made devices

Panasonic RX-DT860 mod, how to unmute audio signal?

uln2003a: Switching ground of device works, however, optional USB function of device doesn't work correctly

Attiny85, reading analog values from PIN3, reports 654 on idle?

Where can I find a datasheet/info of/on this "music speakers" 35 segment LED display with 7 legs? [closed]