Beginners

Beginners

A place for electronics newbies to ask questions. Include detail & what you have already done to find the answer.

Sticky Topics
how does posting math notation work?

Started by Simon on 10 Oct, 2020 08:26
Last post by Paulbi on 17 Jun, 2026 01:07

Views: 270179, Replies: 39
Datasheet Database

Started by webkraller on 15 Oct, 2009 17:07
Last post by dobsonr741 on 17 May, 2026 19:39

Views: 563816, Replies: 102
Electronics primers, course material and books

Started by Chasm on 01 Jan, 2011 20:01
Last post by rosebudsteammyy on 07 May, 2026 10:44

Views: 936437, Replies: 315
From no parts to decent stockpile, best approach?

Started by alexanderbrevig on 18 Aug, 2015 22:13
Last post by JOSDHO on 22 Aug, 2025 08:05

Views: 879743, Replies: 297
Oscilloscope training class (long)

Started by w2aew on 15 Jun, 2011 03:08
Last post by Eurora on 01 Aug, 2025 03:08

Views: 906622, Replies: 228
Why writing style and grammar matters in posts

Started by Nominal Animal on 11 Apr, 2024 18:32
Last post by geralds on 24 Feb, 2025 21:36

Views: 134249, Replies: 52
NEWBIES PLEASE READ BEFORE POSTING

Started by EEVblog on 28 Dec, 2013 22:14

Views: 254210, Replies: 0
Topics
Saw generator with offset on a double comparator

Started by AlexRG on 24 Jun, 2026 17:27
Last post by Raj54 on 26 Jun, 2026 07:20

Views: 480, Replies: 15
Wien bridge

Started by threephase03 on 19 Jun, 2026 09:13
Last post by Raj54 on 26 Jun, 2026 07:19

Views: 750, Replies: 14
Need Help Understanding TL494 Voltage Error Amplifier and Adjustable Voltage Con

Started by ommsiva on 13 Jun, 2026 16:51
Last post by max.wwwang on 26 Jun, 2026 01:54

Views: 3145, Replies: 78
dual coil relay coil polarity

Started by VEGETA on 15 Jun, 2026 11:04
Last post by VEGETA on 25 Jun, 2026 21:50

Views: 2509, Replies: 58
1.5 button cell battery holder

Started by lichurbagan on 23 Jun, 2026 06:29
Last post by SteveThackery on 25 Jun, 2026 20:10

Views: 427, Replies: 9
PNP current mirror

Started by Joy on 25 Jun, 2026 15:32
Last post by Doctorandus_P on 25 Jun, 2026 19:53

Views: 217, Replies: 4
Voltage limits for a current source

Started by LoveLaika on 25 Jun, 2026 15:45
Last post by geggi1 on 25 Jun, 2026 19:43

Views: 255, Replies: 7
Attempt to recreate a probe's pulse induction coils

Started by beamformerXY on 25 Jun, 2026 14:54

Views: 87, Replies: 0
Working principle of battery low charge indication

Started by anso-engineer on 22 Jun, 2026 09:13
Last post by MathWizard on 25 Jun, 2026 14:44

Views: 211, Replies: 3
Why do we say impulse response characterise the LTI system?

Started by shivajikobardan on 09 Jun, 2026 07:24
Last post by mawyatt on 25 Jun, 2026 14:05

Views: 856, Replies: 11
ZT-703S Oscilloscope stops responding to inputs after it boots into scope mode

Started by trotyl on 06 May, 2026 19:54
Last post by trotyl on 25 Jun, 2026 13:17

Views: 461, Replies: 4
Schematic Review — STM32H743 Robot Controller + PDB

Started by KAMAL DEEN on 22 Jun, 2026 14:41
Last post by KAMAL DEEN on 25 Jun, 2026 06:19

Views: 450, Replies: 9
What would this 'photo-transistor' type thing be on a TV IR remote PCB

Started by MathWizard on 25 Jun, 2026 05:55
Last post by RoGeorge on 25 Jun, 2026 06:07

Views: 169, Replies: 3
2-in-1 portable tool for heavy machinery diagnostics?

Started by Pcaiman on 25 Jun, 2026 01:54
Last post by Renate on 25 Jun, 2026 02:22

Views: 131, Replies: 2
How do mains-AC opto-isolators make their supply voltage ?

Started by MathWizard on 22 Jun, 2026 01:13
Last post by Phil1977 on 24 Jun, 2026 17:40

Views: 392, Replies: 6
Beginner switch question.

Started by weswales on 27 Mar, 2026 04:22
Last post by floobydust on 24 Jun, 2026 16:15

Views: 1193, Replies: 28
Weird charging issue with laptop

Started by pierremontagne on 15 Jun, 2026 17:17
Last post by radiolistener on 24 Jun, 2026 13:30

Views: 798, Replies: 20
BM235 – Repeatedly resets when switching to Diode mode

Started by JTW55 on 24 Jun, 2026 02:54
Last post by JTW55 on 24 Jun, 2026 05:39

Views: 222, Replies: 4
opamp CC LED driver

Started by Stjepan on 14 Jun, 2026 10:18
Last post by max.wwwang on 24 Jun, 2026 04:02

Views: 832, Replies: 18
psu tap switching question

Started by ME on 12 Jun, 2026 17:07
Last post by MathWizard on 24 Jun, 2026 02:21

Views: 1286, Replies: 24
IoT GSM SIM to use in Canada/USA

Started by sairfan1 on 22 Jun, 2026 17:04
Last post by radiolistener on 23 Jun, 2026 18:17

Views: 214, Replies: 4
Check the electronic board, with lamp and variac

Started by CharlotteSwiss on 01 Jun, 2026 18:03
Last post by CharlotteSwiss on 23 Jun, 2026 14:48

Views: 3865, Replies: 103
Elegoo starter kit

Started by Cromulent on 20 Jun, 2026 10:07
Last post by BillyO on 23 Jun, 2026 14:32

Views: 732, Replies: 12
Hello from a long-time lurker! (xecor)

Started by xecor on 03 Jun, 2026 08:29
Last post by EEVblog on 23 Jun, 2026 06:42

Views: 639, Replies: 8
sanity check regarding generalized dc-dc&LDO combination math-wise..

Started by sparkydonkey on 21 Jun, 2026 13:14
Last post by sparkydonkey on 22 Jun, 2026 22:51

Views: 235, Replies: 4
Help - How do synchronous boost converters behave at VIn = VOut-ε? e.g. TPS61023

Started by Arte on 21 Jun, 2026 22:08
Last post by Benta on 22 Jun, 2026 18:29

Views: 272, Replies: 4
New to PCB design and EE. Asking for advice

Started by anan5a` on 22 Jun, 2026 06:48
Last post by PGPG on 22 Jun, 2026 16:21

Views: 284, Replies: 4
DPAK Regulator (MC78M05CDTG) Overheating at 24V Input?

Started by Censtry on 16 Jun, 2026 04:15
Last post by stj on 22 Jun, 2026 12:44

Views: 559, Replies: 10
Building a home EE lab on AUD $2500 - how to distribute budget?

Started by Emerald_Myna on 16 Jun, 2026 07:29
Last post by rstofer on 22 Jun, 2026 12:36

Views: 1902, Replies: 38
PC front panels - USB3 never with capacitors, unlike USB2?

Started by lpc32 on 09 Jun, 2026 20:06
Last post by lpc32 on 22 Jun, 2026 07:27

Views: 542, Replies: 4
Register FLUKE Onetouch Series II

Started by kdl1950 on 07 Aug, 2022 08:16
Last post by IrishMASMS on 21 Jun, 2026 17:46

Views: 1139, Replies: 1
Toy repair, only works when I probe with my scope. Do not work when not probing

Started by boumboauto on 17 Jun, 2026 21:14
Last post by Terry Bites on 21 Jun, 2026 15:08

Views: 463, Replies: 6
Book recommendation -- electronics and PCB design for beginners?

Started by ebastler on 01 Dec, 2023 21:56
Last post by tooki on 21 Jun, 2026 10:54

Views: 4188, Replies: 14

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Beginners

Beginners

how does posting math notation work?

Datasheet Database

Electronics primers, course material and books

From no parts to decent stockpile, best approach?

Oscilloscope training class (long)

Why writing style and grammar matters in posts

NEWBIES PLEASE READ BEFORE POSTING

Saw generator with offset on a double comparator

Wien bridge

Need Help Understanding TL494 Voltage Error Amplifier and Adjustable Voltage Con

dual coil relay coil polarity

1.5 button cell battery holder

PNP current mirror

Voltage limits for a current source

Attempt to recreate a probe's pulse induction coils

Working principle of battery low charge indication

Why do we say impulse response characterise the LTI system?

ZT-703S Oscilloscope stops responding to inputs after it boots into scope mode

Schematic Review — STM32H743 Robot Controller + PDB

What would this 'photo-transistor' type thing be on a TV IR remote PCB

2-in-1 portable tool for heavy machinery diagnostics?

How do mains-AC opto-isolators make their supply voltage ?

Beginner switch question.

Weird charging issue with laptop

BM235 – Repeatedly resets when switching to Diode mode

opamp CC LED driver

psu tap switching question

IoT GSM SIM to use in Canada/USA

Check the electronic board, with lamp and variac

Elegoo starter kit

Hello from a long-time lurker! (xecor)

sanity check regarding generalized dc-dc&LDO combination math-wise..

Help - How do synchronous boost converters behave at VIn = VOut-ε? e.g. TPS61023

New to PCB design and EE. Asking for advice

DPAK Regulator (MC78M05CDTG) Overheating at 24V Input?

Building a home EE lab on AUD $2500 - how to distribute budget?

PC front panels - USB3 never with capacitors, unlike USB2?

Register FLUKE Onetouch Series II

Toy repair, only works when I probe with my scope. Do not work when not probing

Book recommendation -- electronics and PCB design for beginners?

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