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APRS repeater based on Raspberry PI as demonstrated by its owner, Howard G1BYY at a technology day held in February at St Albans Community Fire Station
Noong 13 Hunyo 1946, itinatag ng Amerikanong inhinyero na si James Lindenberg ang Bolinao Electronics Corporation (BEC), isang kompanya na gumagawa at bumubuo ng mga kasangkapan para sa radio transmission. Noon taong 1949, lumapit si Lindenberg sa Kongreso ng Filipinas upang hingin ang pahintulot na magtatag at magpatakbo ng isang himpilan ng telebisyon. At noong 14 Hunyo 1950, naaprobahan ang kaniyang kahilingan sa pamamagitan ng Republic Act No. 511 at 512, na nakasaad ang mga responsabilidad sa publiko ng isang himpilan ng telebisyon, tulad ng pagpapalaganap ng makabuluhang kaalaman lalo na sa mahahalagang isyung pampubliko. Ngunit dahil sa kakulangan sa materyales at mahigpit na patakaran sa pag-aangkat ng mga dayuhang produkto, itinuon na lamang ng BEC ang atensiyon sa pagsasahimpapawid sa radyo.
Taóng 1952 nang binili ni Antonio Quirino, na naghahangad ding magtatag ng isang himpilan ng telebisyon, ang malaking porsiyento ng BEC at pinalitan ang pangalan nitó bilang Alto Broadcasting System (ABS). Si Lindenberg ang naging punòng tagapamahala ng himpilan. Noong 23 Oktubre 1953, ang DZAQ-TV 3 sa ilalim ng pamunuan ng ABS ay unang sumahimpapawid at ipinakilála bilang ang kauna-unahang himpilan ng telebisyon sa bansa. Kayâ namang itinuturing ang BEC bilang pinagugatan ng television broadcasting sa Filipinas at si Lindenberg bilang ama ng Telebisyong Filipino.
Noong 1958, ang ABS ay nabili nina Eugenio Lopez, Sr. at ang noo’y pangalawang pangulo na si Fernando Lopez na siyáng may-ari ng Chronicle Broadcasting Network (CBN), isang radio network). Paglipas ng ilang taon, pormal na pinagsanib ang dalawang korporasyon at tinawag na ABS-CBN Broadcasting Corporation. Sa kasalukuyan, ang ABS-CBN ang isa sa mga kilalá at nangungunang kompanya sa larangan ng midya sa bansa. (MJ) ed VSA
Another shot of my medium format camera. This one in more of a studio setup with a flashgun with warming filter bounced off a white wall on the left and a 4800K bulb to the right bounced off a white card.
Drones are one of the coolest gadgets out there right now, and there are so many different reasons you'd want to operate one.
...or The Electronic Tree.
A tiny ribbon cable from a replacement screen for my son's Nintendo DS that I will be spending most of the rest of my life trying to fit.
This little microcontroller evaluation kit is going to be a long exposure timer/intervalometer when I'm done with it. For about $20, it comes with an 8-bit processor with 16K of flash memory, LCD screen, a serial port for programming (you have to solder your own header to it), a temperature sensor, and other assorted goodies (including 512KB of external flash that I have no use for).
It looks to me like Sony puts a fairly thin, almost like an aftermarket type screen protector on the RX100 screens and the edges of the protector are exposed. I am curious if anyone has experienced any chips or damage to the edges of the screen protector?
Here's the circuit for the Black Box Lightshow. I'm pretty sure it's right. And now, an explanation:
The LED array is shown here as individual diodes, though I used six 5x7 LED arrays, each one is 2" tall. They are arranged as 14 rows and 15 columns. The left channel is 8 columns and the right channel is 7 columns. The extra column from the left channel is the center column and gives nice symmetry. Not shown here is that on the right channel, the first column (pin 1) is not used so that the other columns are equal.
The LM3914 is a Dot/Bar Display Driver. It does all the heavy lifting of converting the audio signal into a series of bars - these are typically used as digital meters. The potentiometer sets the sensitivity of the display. Since the rows are multiplexed (see below), each column is only driving one LED at a time. I only show the left channel here, the right channel is identical, and they share the level setting potentiometer.
The right portion of the diagram is a 555 clock, a 7493 4-bit counter and a 74154 4-to-16 line decoder/demultiplexer. This is the "sweep" part of the display that cycles through each row of LEDs. The potentiometer at the top controls the sweep speed. The net result is that the 74154 is cycling through the pins/rows, grounding each in succession. Note that I only have 14 rows, but it is counting to 16 each time. No big deal, it doesn't affect the perceived output at all.
The N2907 transistors are there to provide enough power for all the LEDs. Potentially, all 15 LEDs in a row can be lit up at once, so the transistors make sure there is enough juice.
Unfortunately, I lost the original plans during a garage cleaning after I built the electronics (the box took another few months before I got around to it). I opened it up and reverse engineered my own work. I won't guarantee it, but it sure looks right to me. The one weird thing I found is that I don't have power going to pin 8 of the 555 (as shown here), but it works fine - go figure. Also, I'm not 100% sure I got the polarity of the LEDs right, sorry about that. I would recommend testing that out first.
Please post if you build this and let me know! Also, happy to answer questions along the way.
6W RMS total output power.FM digital tuning with presets.Neodymium speaker driver for rich and clear sound.Play and charge your iPod/iPhone simultaneously.Dock any iPod/iPhone, even in its case.Time and alarm backup for on-time wakeup even with power cut.Sleep timer for easy falling asleep to your favorite music.MP3 Link for portable music playback.Auto clock synchronization with iPod/iPhone when docked
Digging through the photo archives, found this fun side project.
Back in 2001/02 my web site had a little interface where you could turn on or off "pixels", and design a little pattern that'd be submitted and shown to the next visitor on the site. Thousands were submitted. The black-and-white thing in this case is one version of the web UI which was shown.
In 2002 I finally got to making something originating from the internet "real" with this project, having some hardware do something with this data. Andrew Beley, a friend and roommate studying electronics engineering, designed the hardware, and I did the software. Basically a grid of transistors which took 160 of the 8-bit outputs from the parallel port, and lit up accordingly in a 5x32 grid. The software would poll the web site and grab the latest "image" periodically.
I also wrote a simple socket listener which would allow people to issue commands to the thing via telnet (through the host computer.) You could write messages and they'd scroll, etc. I guess I had more time on my hands back in the day. ;)
Prototype 4x4 matrix mixer. Inputs on the left, outputs on the right. DC coupled so it will work with audio and control voltages. Each knob effectively controls the signal level from an input bus to an output.
Picked up an old (massive!) digital voltmeter through eBay. Love the edgelit displays in this, the digits are made up of dots etched on individual pieces of glass or acrylic and illuminated by light shone through the edge. The digits are stacked in front of each other and when you want a particular digit lit, you turn on the relevant light.
This board offers 4 channels of opto isolation. Its awesome for protecting circuits and stuff.
This board offers 4 channels of opto isolation. Its awesome for protecting circuits and stuff.
Our trip to Singapore. Visit our blog for our round the world story and Singapore at aroundtheworldwithkid.com
■ 서울과 샌프란시스코에서 7일 동시 공개행사
□ 이달 말 한국 출시를 시작으로 글로벌 시장 순차 공급
■ ‘쿼드 DAC’과 ‘B&O’의 만남… 섬세하고 깨끗한 원음의 감동 전달
□ 세계 최초 ‘32비트 하이파이 쿼드 DAC’ 탑재 스마트폰
□ ‘B&O 플레이’와 함께 튜닝한 세계 최고 수준 오디오 기능 탑재
■ CD 음질 보다 6.5배 뛰어난 ‘24비트 하이파이 녹음’ 가능
□ 오디오 녹음앱: ‘기본’, ‘콘서트’, ‘사용자 설정’ 등 사용 환경에 따라 선택
□ 자신만의 음원 제작이 가능한 ‘스튜디오 모드’ 기능: 미리 녹음된 반주에 자신의 노래나 악기연주를 더해 녹음
■ 전문가가 찍은 것 같은 흔들림 없는 동영상 촬영 가능
□ 흔들림 보정 기능: 전자식 손떨림 방지(EIS) + 디지털 이미지 보정(DIS)
□ ‘비디오 전문가 모드’에 ‘하이파이 비디오 레코딩 기능’ 추가: 시냇물 소리, 발자국 소리 등 현장의 세세한 소리까지 24비트로 담아
■ 세계 최초 전?후면 광각 카메라 탑재
□ 후면 135도, 전면 120도 광각 카메라 탑재
□ ‘하이브리드 오토 포커스’ 탑재, 세 가지 포커스 방식으로 동시 측정
■ ‘세컨드 스크린’ 등 멀티미디어 기능 강화한 사용자 경험(UX) 제공
□ 밝기 높이고, 글자크기 키워 시인성 개선한 ‘세컨드 스크린’ 탑재
□ 최신 ‘안드로이드 7.0 누가’ 기반의 UX로 사용 편의성 높여
■ 견고함을 갖춘 실용적인 아름다움
□ 알루미늄 소재의 후면 배터리 커버
□ 상?하단에 충격에 강한 ‘실리콘-폴리카보네이트’ 사용
※ Social LG전자 (social.lge.co.kr/newsroom) 에서 관련 보도자료를 확인하실 수 있습니다.
some better photos of the very old 2-bit noise synth project, for a friend who is interested in creating schematics vimeo.com/4290143