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Archive for the ‘PCBs’ Category

NFC antenna tuning without a VNA

Monday, February 18th, 2019

Fred writes: Recently I started work on a new board. This one will be a front door entry system, so I decided to go with something that could read my NFC implant but also had a numeric keypad for the kids (and anyone else) to use. Not everyone wants to...

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Serial Star, a 4 in 1 USB serial and I2C converter

Friday, February 8th, 2019

Jesus Echavarria published a new build: Here’s one of the last board I design the last year. On 2016, I develop the Dual USB Serial and I2C Converter board. Although this board works fine, it has a couple of lacks. First one, is that to use the both converters, you...

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Posted in PCBs, USB | No Comments »

Multislope ADC bring up (dual slope)

Friday, December 28th, 2018

Nava Whiteford has been working on a Multislope ADC: I’ve been playing with a multislope ADC design. Multislope ADC are often used in high end multimeters, and as I have a mild obsession with 8.5 digit multimeters, I wanted to try making a multislope ADC. See the full post on...

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uMesh – A self-contained, battery operated ESP32 module

Tuesday, October 23rd, 2018

Jarrett published a new build: I’ve been working on an ESP32 module. Part of the problem I’ve been seeing with inexpensive IoT dev boards, is that the design around the power system hasn’t been very good. Here’s my attempt to fix that. This is a battery-ready module with a proper...

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Posted in PCBs, wireless | 2 Comments »

6809 CPU board for the RC2014

Thursday, August 9th, 2018

Ben Chong posted his RC2014 6809 CPU board, that is available on github. More details on his blog.

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Scott’s Z80SBC: Z80 single board computer

Thursday, August 2nd, 2018

Dr. Scott M. Baker published a new build: When I was first getting started with electronics, wanted a Heathkit ET-3400 Microproccessor trainer, but could never afford one at the time. Eventually both I and the world moved on, to fancier more capable computers. However, I’ve still always wished I had...

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Posted in PCBs | 1 Comment »

Open source Agilent 53132A 53131A OCXO ultra high stability oven upgrade

Tuesday, July 24th, 2018

Gaurav Singh made an open source 53132A OCXO Ultra stability time base, that is available on github: While i was working with my own GPSDO project. i need to have a frequency counter with descent stability so purchased my self a Agilent 53132A which is a 12 digit frequency counter,...

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Twin ‘T’ CW (Morse) Practice Oscillator

Friday, July 20th, 2018

  Steve Smith (G0TDJ) writes, "I successfully completed the Twin ‘T’ Oscillator, original by Mike Maynard – K4ICY. It’s a great circuit and sounds really good. Much better than a raspy 555 version. Mike has been kind enough to put a link to my project on his website." More details...

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Wavecatcher

Thursday, July 12th, 2018

Anfractuosity published a new build: “Acoustic cryptanalysis is a type of side channel attack that exploits sounds emitted by computers or other devices” Wavecatcher is a simple PCB that makes use of a MEMS ultrasound microphone, in order to capture audio to around 80kHz, with the goal of finding interesting...

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StyloCard

Tuesday, May 8th, 2018

Stylophone business card project from mitxela.com Printed Circuit Boards as a business card are a great gimmick. I'd seen ones with USB ports etched into them, which enumerate as a keyboard and then type a person's name or load up their website. It's just about possible to build them cheap enough...

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Posted in PCBs, techniques | 5 Comments »

BLE Module PCB made with silver paste/laser printer

Tuesday, March 20th, 2018

https://www.youtube.com/watch?v=F9uNdE_027Q NRF52 Bluetooth Low Energy Module PCB using laser printer/silver paste method by Rich Olson. More details at nothinglabs.com.

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Posted in how-to, PCBs | No Comments »

10MHz distribution amplifier

Thursday, March 15th, 2018

G4FRE built a 10MHz distribution amplifier: I have had a need for a distribution amplifier for a while now. Searching around I found the design by G4JNT in Radcom, which filled my needs. I redrew the circuit for 4 outputs and had PCBs made. (if you want one contact me!) ...

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Posted in DIY, PCBs | 2 Comments »

DIY Arduino PCB Pryamiduino

Wednesday, March 7th, 2018

A how-to on designing a DIY Arduino PCB Pryamiduino from Bald Engineer: Continuing the DIY Arduino tutorial series, this AddOhms episode shows how to create a PCB in KiCad. I make a joke that the original design was a rectangle, which I found boring and pointless. So instead, I designed a...

Posted in PCBs, tutorials | No Comments »

Small motor controller with integrated position sensor

Wednesday, February 28th, 2018

Ben Katz writes: A while ago I added the hall effect encoder IC I've been using directly to the motor controller PCB.  The controller sits directly on the back of the motor (with a magnet added to the motor shaft), and the phase wires solder straight in.  I also have...

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Posted in PCBs, sensors | No Comments »

Open source 22mm diameter PCB project

Wednesday, February 14th, 2018

An open source 22mm diameter PCB project from Concretedog, that is available on github: So I posted a while back about how I had used these 22mm pcb's I'd made in prototyping an ematch ignitor system for use in rocketry. Although I made these stackable boards so they would fit...

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Posted in open source, PCBs | 3 Comments »

DIY through hole plating of PCBs

Monday, October 30th, 2017

Jan Mrázek documented his experience experimenting with DIY through-hole plating of PCBs: I’ve been thinking about though hole plating for several years. The general procedure is simple – you have to activate non-copper surfaces (make them conductive) and then you apply standard electroplating procedure. You can find many tutorials on...

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Posted in DIY, PCBs | 1 Comment »

PICKit 3 Mini

Tuesday, October 10th, 2017

Reviahh has published a new build, the PICKit 3 Mini: Previously, I made a Pickit 3 clone – (see previous blog post). It works well, but I have often wondered just how little of its circuitry was needed to program and debug the boards I make. For instance – I primarily...

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Posted in PCBs, PIC | 5 Comments »

PCB Businesscard Nextgen: NFC enabled

Tuesday, October 3rd, 2017

A followup to the PCB business card post,  Sjaak writes: Designing a PCB business card seems to be the go-to for a hobbyist electronic engineers. Most people design either a passive PCB, USB HID/MSD device or battery powered LED frenzy. Uptill now I haven’t seen any cart that has a...

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Pimp your PCB businesscard full color

Wednesday, July 26th, 2017

Here is a nice PCB businesscard @ smdprutser.nl As a good electronic hobbiest tradition I started to design a businesscard from PCB material. Downside of all the businesscards (and PCBs in general) is the limited number of colors you can use: FR4, soldermask (with or without copper behind it), silkscreen...

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Posted in PCBs, techniques | No Comments »

Panelization – using GerberPanelizer on Windows (Linux possible)

Wednesday, May 31st, 2017

Arsenijs over at Hackaday.io writes: This tutorial was done on Windows. Authors claim it could also be used on Linux by using Mono, but I haven't tried and don't understand a lot about Mono to see what could be done. I am switching to Linux nowadays, so I'd be very grateful...

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Posted in PCBs, tutorials | No Comments »

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