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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Weird product - with fake MAX7219 - but still works

Started by wobbly on 02 May, 2026 11:22
Last post by amyk on 05 May, 2026 04:44

Views: 1783, Replies: 17
My first attempt at flex circuits

Started by SCSKITS on 02 May, 2026 17:39
Last post by twospoons on 04 May, 2026 22:35

Views: 742, Replies: 6
Matching JFETs for differential amplifier service – how much data is enough?

Started by MisterHeadache on 17 Feb, 2026 16:02
Last post by MisterHeadache on 04 May, 2026 22:22

Views: 2048, Replies: 12
Low Cost milliohm meter

Started by ricko_uk on 23 Apr, 2026 00:44
Last post by Randy222 on 04 May, 2026 20:37

Views: 4413, Replies: 38
UV EPROM eraser - Do it yourself with UV induction lamp

Started by Tantratron on 01 May, 2026 07:21
Last post by Gyro on 04 May, 2026 09:59

Views: 2070, Replies: 15
Any point diy a field radiation spectrometer?

Started by MT on 03 May, 2026 14:30
Last post by JimRemington on 03 May, 2026 22:53

Views: 621, Replies: 6
Peak detector schematic check

Started by DigitalDesigner on 01 May, 2026 16:10
Last post by ricko_uk on 03 May, 2026 21:53

Views: 1292, Replies: 11
Simple Switching Regulator

Started by azeeman on 21 Mar, 2026 18:16
Last post by azeeman on 03 May, 2026 15:05

Views: 1145, Replies: 12
Fastest transistor OPA I've built

Started by MT4S301 on 03 May, 2026 14:36

Views: 380, Replies: 0
Universal 10 MHz GPSDO with 1PPS, sine and square outputs (based on Lars)

Started by Lumen567 on 02 May, 2026 20:42
Last post by SCSKITS on 03 May, 2026 10:30

Views: 902, Replies: 4
Splice - Cable Harness CAD Tool

Started by splice on 15 Jun, 2025 23:24
Last post by MarginallyStable on 02 May, 2026 21:57

Views: 3991, Replies: 15
3D Printed adapter for using 6mm knobs on 3mm shaft

Started by mawyatt on 02 May, 2026 13:50
Last post by 2N3055 on 02 May, 2026 20:07

Views: 1087, Replies: 9
time range for cable TDR logic question

Started by john23 on 30 Apr, 2026 19:10
Last post by john23 on 02 May, 2026 18:51

Views: 869, Replies: 8
Help how to have really correct installation of audio playing speaker for PC

Started by marhuum on 02 May, 2026 00:52
Last post by marhuum on 02 May, 2026 15:33

Views: 420, Replies: 3
HB100 Doppler radar IF amplifier with MCP6002 for STM32 ADC — gain and filter ?

Started by mehmet_DORA on 01 May, 2026 17:45
Last post by Simon on 02 May, 2026 11:38

Views: 436, Replies: 1
Wire strippers

Started by npelov on 24 Mar, 2014 17:28
Last post by cncjerry on 02 May, 2026 04:46

Views: 37190, Replies: 61
UVLO Latching Circuit

Started by hsquared on 01 May, 2026 23:27

Views: 266, Replies: 0
UF4001 Diode Graph

Started by bostonman on 01 May, 2026 02:29
Last post by PCB.Wiz on 01 May, 2026 22:43

Views: 1061, Replies: 13
Hack a USB Charger?

Started by Torquin on 16 Apr, 2026 11:27
Last post by Torquin on 01 May, 2026 21:38

Views: 735, Replies: 6
Tell if stepper motor is running, to a relay!

Started by 777guru on 21 Apr, 2026 18:09
Last post by floobydust on 01 May, 2026 19:31

Views: 6294, Replies: 63
Low leakage & voltage drop backfeed protection

Started by Sudo_apt-get_install_yum on 27 Apr, 2026 09:55
Last post by Johnny B Good on 01 May, 2026 15:41

Views: 662, Replies: 3
A4988 Current Limiting Not Matching Datasheet Formula - Much higher...

Started by DigitalDesigner on 24 Jan, 2026 00:52
Last post by DigitalDesigner on 01 May, 2026 15:03

Views: 1146, Replies: 3
Super easy composite amplifier utilizing LM3886/76!

Started by pet_rushi on 19 Jul, 2024 05:41
Last post by mawyatt on 01 May, 2026 14:19

Views: 5489, Replies: 10
Simulation of CM/DM noise filtering for an isolated DC/DC converter

Started by electroalchemist on 01 May, 2026 04:09
Last post by mtwieg on 01 May, 2026 11:28

Views: 728, Replies: 3
Programmable Bench Power Supply Features

Started by Magnethicc on 19 Apr, 2026 08:18
Last post by Renate on 01 May, 2026 09:52

Views: 3176, Replies: 24
Is it possible to find out which patents cover certain ICs?

Started by hanakp on 30 Apr, 2026 13:42
Last post by mawyatt on 30 Apr, 2026 17:02

Views: 490, Replies: 3
Red flashlight circuit for astronomy.

Started by andrejsstrumfs on 25 Apr, 2026 12:49
Last post by andrejsstrumfs on 30 Apr, 2026 15:33

Views: 1419, Replies: 11
How would I couple noise into my circuit?

Started by ballsystemlord on 27 Apr, 2026 13:04
Last post by rfclown on 30 Apr, 2026 02:25

Views: 1350, Replies: 10
Project: BMS Monitoring with 10-cell simulator, STM32 master, and Touch UI

Started by maxxbox on 29 Apr, 2026 22:24
Last post by maxxbox on 29 Apr, 2026 22:52

Views: 1108, Replies: 2
Cheap chinese 10 MHz OCXO Frequency Reference Modules

Started by Transradio on 16 Feb, 2023 13:55
Last post by Yrrah on 29 Apr, 2026 18:58

Views: 74655, Replies: 74
Dallas DS1384G datasheet for QFP-48 version

Started by Mark Krass on 26 Apr, 2026 17:00
Last post by Mark Krass on 29 Apr, 2026 17:04

Views: 1133, Replies: 10
Active Shunt / Braking Chopper design for 48V 500W Power supply regulation

Started by electronx on 27 Apr, 2026 12:58
Last post by langwadt on 29 Apr, 2026 13:22

Views: 1512, Replies: 8
Tek Demo Board Question

Started by FordRanger1998 on 29 Apr, 2026 03:24
Last post by jonpaul on 29 Apr, 2026 05:31

Views: 332, Replies: 1
Reverse engineering the FNIRSI 1014D

Started by pcprogrammer on 09 May, 2024 19:41
Last post by nht7 on 29 Apr, 2026 00:44

Views: 49374, Replies: 95
Power Driver for Electromagnetic Field Generation

Started by adrisbd on 28 Apr, 2026 13:50

Views: 335, Replies: 0
TPA3116 unused channel

Started by s0b9r on 28 Apr, 2026 10:29

Views: 244, Replies: 0
back-to-back placement of 1G Ethernet Magnetics viable on a PCB?

Started by Michaelt237 on 28 Apr, 2026 05:06
Last post by PGPG on 28 Apr, 2026 07:45

Views: 370, Replies: 1
Schematic Review: MAX30003 and nRF52840 (XIAO)

Started by Nam on 27 Apr, 2026 03:21
Last post by jc101 on 28 Apr, 2026 06:37

Views: 998, Replies: 5
SCPI - VISA generator scripting software

Started by EJC on 25 Apr, 2026 21:36
Last post by mr ed on 28 Apr, 2026 00:56

Views: 884, Replies: 6
Looking for 14-seg LED displays, but narrow...

Started by TERRA Operative on 26 Apr, 2026 18:48
Last post by PCB.Wiz on 27 Apr, 2026 22:49

Views: 1039, Replies: 7

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Projects, Designs, and Technical Stuff

Projects, Designs, and Technical Stuff

Weird product - with fake MAX7219 - but still works

My first attempt at flex circuits

Matching JFETs for differential amplifier service – how much data is enough?

Low Cost milliohm meter

UV EPROM eraser - Do it yourself with UV induction lamp

Any point diy a field radiation spectrometer?

Peak detector schematic check

Simple Switching Regulator

Fastest transistor OPA I've built

Universal 10 MHz GPSDO with 1PPS, sine and square outputs (based on Lars)

Splice - Cable Harness CAD Tool

3D Printed adapter for using 6mm knobs on 3mm shaft

time range for cable TDR logic question

Help how to have really correct installation of audio playing speaker for PC

HB100 Doppler radar IF amplifier with MCP6002 for STM32 ADC — gain and filter ?

Wire strippers

UVLO Latching Circuit

UF4001 Diode Graph

Hack a USB Charger?

Tell if stepper motor is running, to a relay!

Low leakage & voltage drop backfeed protection

A4988 Current Limiting Not Matching Datasheet Formula - Much higher...

Super easy composite amplifier utilizing LM3886/76!

Simulation of CM/DM noise filtering for an isolated DC/DC converter

Programmable Bench Power Supply Features

Is it possible to find out which patents cover certain ICs?

Red flashlight circuit for astronomy.

How would I couple noise into my circuit?

Project: BMS Monitoring with 10-cell simulator, STM32 master, and Touch UI

Cheap chinese 10 MHz OCXO Frequency Reference Modules

Dallas DS1384G datasheet for QFP-48 version

Active Shunt / Braking Chopper design for 48V 500W Power supply regulation

Tek Demo Board Question

Reverse engineering the FNIRSI 1014D

Power Driver for Electromagnetic Field Generation

TPA3116 unused channel

back-to-back placement of 1G Ethernet Magnetics viable on a PCB?

Schematic Review: MAX30003 and nRF52840 (XIAO)

SCPI - VISA generator scripting software

Looking for 14-seg LED displays, but narrow...

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