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Archive for the ‘DIY’ Category

Lightronome 1 – The light based metronome

Monday, February 19th, 2018

Zoltán Gomori documented his lightronome build: I got a request, to design and build an electronic metronome. You can find several on the market, but the problem it is ether producing voice or the classical mechanical metronome. The requirement here was a visual effect. To be precise four LEDs for 4/4 beat....

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Posted in DIY, LEDs | No Comments »

ESP8266 Wi-Fi button – DIY Amazon dash button clone

Wednesday, January 24th, 2018

Rui Santos over at Random Nerd Tutorials posted a step by step guide on building an ESP8266 Wi-Fi button: In this project you’re going to build an ESP8266 Wi-Fi Button that can trigger any home automation event. This is like a remote control that you can take in your pocket...

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Posted in DIY, tutorials | No Comments »

Easing the pain of SWD on modern DPS:es

Monday, January 8th, 2018

Johan Kanflo writes: On newer DPS:es, the SWD connector is a JST-GH (1.25mm spacing that is) which translates to “really tiny”. The annular rings where you need to apply solder and heat for adding wires are even smaller. This is why the OpenDPS SWD Bottle is handy. Add three P50-E2...

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Bus timer project

Thursday, December 7th, 2017

Limpkin published a new build: For once, this project was not for me... it was for my wife ! Every morning she takes the bus then train to go to work. If she misses her train, she has to wait for more than 30 minutes for the next one. Not...

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6×1 antenna switch

Thursday, November 30th, 2017

Mare published a new build: This is complete project for 1×6 antenna switch. It was bult in more than 50 pieces around the world and performs really good. Even big guns use it for their systems. The project was designed with help from other OMs (S55O, S59MA, S50LD, S51CT, S51ZJ,...

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Transistor radio series – The 7 MHz scratch synthesizer

Wednesday, November 29th, 2017

Vasily Ivanenko has written up documentation on his 7 MHz synthesizer project: Above — All 4 boards were built in re-purposed Hammond boxes. A PIC-based counter sits on top of the offset mixer. I build modular gear and this allows modification and fosters experimentation. When I build a final transistor...

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Posted in DIY, RF | No Comments »

Cheap DIY USB MIDI to CV

Thursday, November 23rd, 2017

A how-to on making a DIY USB MIDI to CV from DIY Synthesizer: This one is simple and does not require any expensive Teensy’s or STM32. It runs on the ATtiny85 using V-USB. The ATtiny is programmed with the Micronucleus bootloader and is firmware upgradeable incircuit. More details at DIY Synthesizer homepage.

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Posted in DIY, how-to | 2 Comments »

Overdrive guitar effects pedal

Friday, November 17th, 2017

Eddie over at Bantam Tools shared detailed instructions of how to build this DIY overdrive effects pedal: This project shows you how to make your very own effects stompbox! We'll go through the steps of downloading the .brd file, loading the file into our software, milling the board on the...

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Posted in DIY, how-to | No Comments »

Arduino controlled Dual Mono AK4490 DAC (part 1)

Thursday, November 16th, 2017

This article is the first of a series detailing the design and build process of an Arduino controlled Dual Mono AK4490 DAC by DimDim: The design goal was to do a dual mono design so as to maximize SNR and channel separation. A 4-layer PCB design was chosen so as to...

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Posted in Arduino, DIY | No Comments »

Simpleceiver Plus version 2 SSB transceiver

Thursday, November 2nd, 2017

An update on Pete Juliano's (N6QW) Simpleceiver project we covered previously: Version 2 -- What is it? V2.0 is the Simpleceiver Plus SSB Transceiver Architecture with the following changes: A GRQP Club 9.0 MHz Crystal Filter is used in place of the homebrew 12.096 Four Pole Filter. This gives the...

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Posted in DIY, RF | No 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 »

Simulating 3-phase AC for energy monitor testing

Thursday, October 12th, 2017

Tisham Dhar blogged about his 3-phase synthesizer: Finding 3-phase is difficult, convincing the owner of the said supply to test some home made hardware is even more so. After building a 3-phase energy monitor my testing options for it appeared very limited. So I set about making my own low-cost 3-phase...

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Posted in DIY, testing | No Comments »

How to build your own RS232 to TTL converter

Friday, September 29th, 2017

A how-to on making a DIY RS232 to TTL converter by Jestine Yong: As I read many pages on the internet I saw there is a sort of adapter so called “USB to TTL adapter” who can communicate through with the uC. I had not the time to order one...

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Posted in DIY, tutorials | 4 Comments »

Building a 12V 110Ah battery bank using 80 32650 LiFePO4 cells

Monday, September 25th, 2017

Kerry Wong built a DIY battery bank using eighty 32650 LiFePO4 cells: During the past couple of weeks I have been busy making a large battery bank using the eighty 32650 LiFePO4 cells I bought on eBay. The battery bank I am building is a 12V (13.2V nominal) 4S/20P one....

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Posted in DIY | 2 Comments »

Build your own testing/programming jig

Friday, September 22nd, 2017

Sjaak has published a new build: Inspired by an old article from sparkfun and some tests I conducted myself I came up with a PCB that holds the pogopinholders and an lasercut acrylic fixture for the PCB on top. Using the dirt(y)cheap services from dirtypcbs.com the cost for this jig, including...

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Posted in DIY, testing | No Comments »

Network cable tester

Friday, September 15th, 2017

Dilshan Jayakody writes, "This is an automatic Cat6 / Cat5 network cable tester designed using NE555 timer and 4017 decade counters. This unit test all 8 wire lines of twisted pair network cable and indicate pass/fail status with single LED. We design this unit to test network connectivity issues in...

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Posted in DIY | 4 Comments »

DIY ISA game control adapter with parallel IO

Tuesday, September 12th, 2017

Dr. Scott Baker has published a new build: My Xi 8088 homebuilt PC is running a little short on slots, so I wanted to combine the functions of a game control adapter and an 8255 PIO board. Two functions in one slot. As to why one wants each of these...

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Building a high capacity battery bank

Tuesday, September 12th, 2017

https://www.youtube.com/watch?v=cviyIIvBlto Kerry Wong has been working on building a high capacity battery bank using his DIY tab welder. More info on his blog here.

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Posted in DIY | No Comments »

The Boat PC – a marine based Raspberry Pi project

Friday, September 8th, 2017

Domipheus has published a new build: In late 2015 I was doing my usual head-scratching about what gifts to get various family members for the holiday season. My wife mentioned making something electronic for my father-in-laws boat, and after a few hours of collecting thoughts came up with an idea:...

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Posted in DIY, R-Pi | 2 Comments »

Precision voltage source – voltage calibrator

Thursday, August 31st, 2017

Mare writes, "What I missed in my workshop is nifty small programmable precision voltage source which can be used as calibration voltage source for testing and calibration purposes. I decided to make one, because instruments which have word “calibrator” have price with same digits as there is vocals in this magic...

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Posted in DIY | 3 Comments »

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Recent Comments

  • Wilyb: Never got one
  • Dan: Free is always good. Nice boards too.
  • Dan: Free is always good.
  • KH: I think no plague. Both failed capacitors are on the same side. Look at the backplane, it's likely the failed caps were on the left...
  • Glendon: Free is always GOOD!