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Almost ready to test.
Input is 50V p-p AC from a wall wart. Output is ±1–24VDC (trimmer adjusted) regulated by a standard LM317/LM337 circuit.
Pins underneath meet the pair of rails on a standard breadboard.
Both regulator circuits were tested on the breadboard first, so I'm just looking for soldering and wiring errors. And I need to add the 2 x Cadj capacitors and one diode to feed the negative smoothing capacitor.
The Adafruit protoboard is only just big enough…
NOS Parts from an estate sale.
Previous owner had been in HAM radio for the better part of 60 years and accumulated quite a collection of parts from the late 1950's to early 1960's.
Most are New Old Stock, with some parts being used but working.
I took several photos of the Tamiya Twin-Motor Gearbox for a review I wrote a couple years ago, this is a photo that wasn't used.
The new color for the DorkbotPDX PCB Order.
Thanks to everyone that's suffered through my attempts to get the color right over the last few orders!
El 6 de junio de 2015 se visita la planta fotovoltaica de Torija que, gracias al proyecto de #RecuperaelSOL, ha sido recuperada y socializada.
El proyecto Recupera el Sol de Som Energia permite recuperar aquellas plantas fotovoltaicas que, como consecuencia de la crisis económica o de la última reforma energética del Gobierno, corren el riesgo de ser entregadas a los bancos y restituyendo la propiedad a los ciudadanos.
Web del proyecto:
Som Energía:
Som Energía Madrid:
Twitter:
Facebook:
www.facebook.com/madridsomenergia
Youtube:
The display on my 1960s-vintage Hewlett Packard 132A dual-beam oscilloscope is dead, and I suspect the problem is the CRT tube. But before I can search for a replacement, I had to get the part number. And to get the part number, I had to poke around inside.
Now I know, so If you happen to have a spare HP 5083-0722 CRT tube on hand, please give me a shout.
세계적인 그래피티 아티스트 존원(JonOne)이 3일(현지시각) 독일 베를린에서 열리고 있는 유럽 최대 가전전시회 IFA 2016에서 LG전자 부스를 찾았다.
LG전자는 이번 전시회에서 존원의 그래피티(Graffiti) 작품으로 독창적인 디자인을 강조한 존원 아트시리즈를 공개했다. 포터블 스피커, 그램 15 노트북, 21:9 울트라와이드 모니터 등으로 구성된 존원 시리즈는 제품 외관에 존원의 그래피티 작품을 적용해 관람객들의 이목을 끌었다. 존원이 LG전자 부스에 전시된 존원 아트시리즈를 소개하고 있다.
This image is the 2 outer layers of a 4 layer PCB I recently designed. This PCB is for my Logic Analyzer project - which if you're interested you can follow along at github.com/sgstair/logicanalyzer
It's also an instructable so you can get the instructions here: www.instructables.com/id/MemAxe-8Bit-sound-effects-memory...
MemAxe is an electronic game that tests your memory by making you copy a sequence of sounds using switches. The sounds emulate those of old 8-bit game consoles.
Pretty damn crude, but at least I know that the servo can lift that motor, I still need to hook it all up so it is under control of one circuitry (right now motor and servo are separate) so I can make it mimic the actions of one of the servos in my software simulation.
I'm still figuring out this whole electricity thing, I gotta make sure my circuit can actually power all the servos and motors at the same time.
■ 19일 서초R&D캠퍼스에서 ‘2017 LG 소프트웨어 개발자의 날’ 개최
※ Social LG전자 (social.lge.co.kr/newsroom) 에서 관련 보도자료를 확인하실 수 있습니다.
This is the breadboard with the TX converter complete. The coax is connected to the FT-817 acting as an IF rig, and the blue wire is connected to the balanced antenna port on the R-75. On the input side I'm running 100mW from the FT-817 into a ~20dB attenuator. This signal gets fed to a mixer that combines the signal with the 10MHz local oscillator, then outputs a signal at 136KHz. I will be adding a 500KHz low pass section and a power amplifier soon.