Projects, Designs, and Technical Stuff

Projects, Designs, and Technical Stuff

Show off your projects you are working on. Talk about designs or ideas, ask technical questions, and share technical information.

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How do soldering tips work? I cannot find any thermistor or thermocouple inside

Started by ballsystemlord on 22 Nov, 2025 03:51
Last post by ejeffrey on 25 Nov, 2025 04:20

Views: 1888, Replies: 16
Li-ion charging + rails on small PCB —— Safest path without PCB rework?

Started by fas11030 on 13 Nov, 2025 03:15
Last post by thm_w on 24 Nov, 2025 23:05

Views: 659, Replies: 4
Turning kemper 1600 in to hakko soldering iron

Started by Mrki on 24 Nov, 2025 21:29

Views: 277, Replies: 0
Any Info on this 4 Port Ethernet PCB YT9215 Based

Started by LaserSteve on 18 Nov, 2025 23:56
Last post by LaserSteve on 24 Nov, 2025 20:16

Views: 992, Replies: 6
2 hand control circuit for 2 coils

Started by zplitt on 18 Nov, 2025 18:59
Last post by pcprogrammer on 24 Nov, 2025 17:33

Views: 1780, Replies: 12
Looking for weatherproof push button switch

Started by soldar on 22 Nov, 2025 13:48
Last post by nali on 24 Nov, 2025 16:36

Views: 2136, Replies: 21
Need a Professional to take a quick look at my design

Started by tdengineer on 22 Nov, 2025 17:26
Last post by free_electron on 24 Nov, 2025 14:58

Views: 2570, Replies: 24
DC Motor reversing switch with neutral position

Started by OkeeDokee on 23 Nov, 2025 01:10
Last post by Terry Bites on 24 Nov, 2025 14:21

Views: 649, Replies: 2
circuit safety

Started by pete g on 23 Nov, 2025 20:59
Last post by pete g on 23 Nov, 2025 23:20

Views: 740, Replies: 6
gold/ceramic ICs identification

Started by redmike5 on 20 Nov, 2025 00:08
Last post by redmike5 on 23 Nov, 2025 22:26

Views: 1991, Replies: 16
Probing high frequencies - active vs. passive probe - unexpected result

Started by 6SN7WGTB on 23 Nov, 2025 18:39
Last post by UnijunctionTransistor on 23 Nov, 2025 20:50

Views: 816, Replies: 6
18650 Battery Positive Insulation Rings

Started by Miti on 22 Nov, 2025 13:41
Last post by Miti on 23 Nov, 2025 20:49

Views: 1131, Replies: 8
What is wrong with this circuit? Will it cause damage?

Started by shakedown on 20 Nov, 2025 21:10
Last post by shakedown on 23 Nov, 2025 20:13

Views: 1773, Replies: 16
high power and high resolution power supply - what are the applications?

Started by Magnethicc on 23 Nov, 2025 09:18
Last post by radiolistener on 23 Nov, 2025 19:28

Views: 468, Replies: 2
FM Broadcast shutdown retrofit project

Started by davorin on 15 Nov, 2025 16:12
Last post by coppercone2 on 23 Nov, 2025 10:31

Views: 1920, Replies: 18
Concord security panel install code retrieval from MI24LC256 EEPROM

Started by allanfan on 23 Nov, 2025 02:16

Views: 319, Replies: 0
Relay switching side and clearance/creepage question

Started by Red Squirrel on 30 Oct, 2025 13:37
Last post by Red Squirrel on 23 Nov, 2025 01:56

Views: 4846, Replies: 50
Feast your eyes on my beautiful SPI BUS

Started by tdengineer on 17 Nov, 2025 11:15
Last post by coppercone2 on 22 Nov, 2025 19:39

Views: 2233, Replies: 20
Which Route should I go with for power?

Started by tdengineer on 21 Nov, 2025 11:43
Last post by tdengineer on 22 Nov, 2025 15:11

Views: 1144, Replies: 10
Help with Multisim Circuit Design

Started by JOJOElectro29 on 21 Nov, 2025 12:54
Last post by ledtester on 22 Nov, 2025 14:59

Views: 1545, Replies: 10
Zener & TVS Freewheel Diode Selection for Relay Back EMF Protection

Started by 2X on 18 Nov, 2025 21:22
Last post by johansen on 22 Nov, 2025 06:30

Views: 3872, Replies: 19
Toroidal transformers / Silicon steel

Started by theoldwizard1 on 21 Nov, 2025 13:34
Last post by chasnc on 22 Nov, 2025 06:12

Views: 1611, Replies: 12
Simple (op-amp + mosfet) linear LED current driver not working?

Started by ricko_uk on 22 Nov, 2025 02:50
Last post by ricko_uk on 22 Nov, 2025 04:05

Views: 718, Replies: 5
Simple alarm project ideas

Started by Shock on 22 Nov, 2025 03:44

Views: 347, Replies: 0
[PCB Review Request] Zynq 7020 PCB Review

Started by rkarl on 17 Nov, 2025 00:53
Last post by rkarl on 22 Nov, 2025 01:30

Views: 715, Replies: 1
HC-06 Fails

Started by Tnixsw on 08 Nov, 2025 11:04
Last post by Tnixsw on 22 Nov, 2025 00:56

Views: 1614, Replies: 14
Pulse Oximeter Heart-Rate Monitor Design — What’s the Most Reliable Solution?

Started by ricko_uk on 08 Nov, 2025 23:33
Last post by dietert1 on 21 Nov, 2025 12:09

Views: 2773, Replies: 20
Alternative to broken Bode plot feature on Rigol DHO914/924

Started by wenzel.jakob on 20 Nov, 2025 20:54
Last post by zelectronicauy on 21 Nov, 2025 11:56

Views: 619, Replies: 2
PA1616D / PA6H — Sleep current ~1.4 mA vs ref 365 µA — where am I missing? Post

Started by madhu.wesly01 on 21 Nov, 2025 09:25
Last post by madhu.wesly01 on 21 Nov, 2025 10:27

Views: 424, Replies: 2
Schumann resonance receiver

Started by FrankBuss on 09 Nov, 2025 04:23
Last post by coppercone2 on 21 Nov, 2025 08:43

Views: 3805, Replies: 18
HP 8443A Nixie Counter Track Gen wierd capacitor mounting

Started by oz2cpu on 20 Nov, 2025 22:14

Views: 281, Replies: 0
Please could someone check my schematic is correct

Started by ekaj999 on 18 Nov, 2025 04:41
Last post by tooki on 20 Nov, 2025 20:46

Views: 3821, Replies: 33
Passive Voltage Gain from just a JFET, and even just Rs and Cs?

Started by mawyatt on 08 Nov, 2025 17:14
Last post by RoGeorge on 20 Nov, 2025 18:54

Views: 3485, Replies: 35
Identifying a IC

Started by Supreme920 on 18 Nov, 2025 10:50
Last post by m k on 20 Nov, 2025 17:13

Views: 1322, Replies: 11
Do RF lines have to be a certain length? Based on Frequency?

Started by tdengineer on 20 Nov, 2025 11:26
Last post by radiolistener on 20 Nov, 2025 12:10

Views: 740, Replies: 3
DDR3 Dual Chip design tinkering (Allwinner A20)

Started by cheeseburger on 15 Nov, 2025 15:56
Last post by TinLethax on 20 Nov, 2025 00:24

Views: 1367, Replies: 6
USB Device VID and PID best approach.

Started by Twistx77 on 07 Feb, 2017 15:11
Last post by tomeko on 19 Nov, 2025 22:17

Views: 28887, Replies: 33
Stabistor?

Started by cncjerry on 19 Nov, 2025 05:42
Last post by cncjerry on 19 Nov, 2025 22:03

Views: 1233, Replies: 6
Reading memory from CH340C/E

Started by okw on 10 Feb, 2025 18:02
Last post by voltsandjolts on 19 Nov, 2025 22:01

Views: 2017, Replies: 6
CableShieldTester – Is the cable shielded or not? (DIY project)

Started by pg on 10 Nov, 2025 16:58
Last post by pg on 19 Nov, 2025 14:24

Views: 928, Replies: 5

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Projects, Designs, and Technical Stuff

Projects, Designs, and Technical Stuff

How do soldering tips work? I cannot find any thermistor or thermocouple inside

Li-ion charging + rails on small PCB —— Safest path without PCB rework?

Turning kemper 1600 in to hakko soldering iron

Any Info on this 4 Port Ethernet PCB YT9215 Based

2 hand control circuit for 2 coils

Looking for weatherproof push button switch

Need a Professional to take a quick look at my design

DC Motor reversing switch with neutral position

circuit safety

gold/ceramic ICs identification

Probing high frequencies - active vs. passive probe - unexpected result

18650 Battery Positive Insulation Rings

What is wrong with this circuit? Will it cause damage?

high power and high resolution power supply - what are the applications?

FM Broadcast shutdown retrofit project

Concord security panel install code retrieval from MI24LC256 EEPROM

Relay switching side and clearance/creepage question

Feast your eyes on my beautiful SPI BUS

Which Route should I go with for power?

Help with Multisim Circuit Design

Zener & TVS Freewheel Diode Selection for Relay Back EMF Protection

Toroidal transformers / Silicon steel

Simple (op-amp + mosfet) linear LED current driver not working?

Simple alarm project ideas

[PCB Review Request] Zynq 7020 PCB Review

HC-06 Fails

Pulse Oximeter Heart-Rate Monitor Design — What’s the Most Reliable Solution?

Alternative to broken Bode plot feature on Rigol DHO914/924

PA1616D / PA6H — Sleep current ~1.4 mA vs ref 365 µA — where am I missing? Post

Schumann resonance receiver

HP 8443A Nixie Counter Track Gen wierd capacitor mounting

Please could someone check my schematic is correct

Passive Voltage Gain from just a JFET, and even just Rs and Cs?

Identifying a IC

Do RF lines have to be a certain length? Based on Frequency?

DDR3 Dual Chip design tinkering (Allwinner A20)

USB Device VID and PID best approach.

Stabistor?

Reading memory from CH340C/E

CableShieldTester – Is the cable shielded or not? (DIY project)

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