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A Knox College student disassembles old electronic devices in a physics department lab, prior to recycling.
Photo from a random schematic I made a while back. For those intrested, a small project description can be found at bas.woodpecker.gotdns.org/pic.php#WoodWatcher
This is according to Mr Carlson's schematic, and it works! (See previous image.)
Power rails are +/- 15V.
Op amp is TL072CP.
Component values are chosen for ~ 1kHz frequency.
Here is my circuit in operation. This is showing a test I put together for a hypothetical display for a car computer.
You may want to be careful about visiting any sites mentioned on strange displays, however...
Exploring a discarded cable box I found at the landfill. When I'm done, I'll give to a friend who recycles electronics.
Adds 64 true bidirectional CMOS I/O, programmable pullups, uses two I2C pins.
Design contest to win a free Centipede Shield prototype: www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1257672398/0
■ 2일부터 이달 말까지 전국 판매점에서 고객 이벤트 열어
□ 압도적 화질과 세련된 디자인의 LG 프리미엄 TV를 실속있게 구매하는 기회
■ 고객들에게 다양한 구매 혜택 제공하며 프리미엄 시장 주도권 강화
□ 올레드 TV 구매 시 최대 200만 원 캐시백 등 다양한 혜택
■ LG전자 HE마케팅커뮤니케이션FD 허재철 상무, “프리미엄 TV의 진정한 가치를 체험할 수 있도록 다양한 혜택을 지속적으로 늘려 나갈 것”
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This is hanging from a building on my way to work. I don't know what it is exactly. I can make out a transformer, a relais, some capacitors, and an IC.
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Один из наиболее массовых советских процессоров. Оказалось, что вопреки распространенному убеждению, он не является послойной копией Intel 8080/8080A (некоторые блоки похожи, но разводка и расположение контактных площадок существенно отличается). Самые тонкие линии — 6µm.
All soldering and wiring done.
Definitely not the best soldering I've ever done. Seems I need the practice…
The HD44780 controller is a very common little chip that acts as the brains behind little character-based displays. These displays are every, every, everywhere - the gas station down the street from my house has them in the gas pumps and the cash registers, our new printer/scanner uses one, and I'd bet my eyeteeth that the little glowy displays in modern pay phones are driven by a very similar chip. Srsly. If you spend some time out and about in a well-settled part of any developed nation these days, you're bound to encounter several of them. There may well be some in your home, especially if you're a gadget freak.
I think the HD44780 is mid-eighties tech. They're not as flexible and fancy as graphic LCD controllers, but most applications don't need much. The HD44780 and its clones usually come with the English alphabet built in, as well as punctuation, numbers, and the Japanese katakana syllabary. There are also a few umlauted letters, Greek letters, and symbols - even an ñ! Scroll down a bit on this page to see the whole gang.
Code for using these displays is very easy to find on microcontroller hobbyist sites, but I wrote my own - as a software guy, I consider that the fun part. This picture shows a display I recently bought on eBay for about $11. It has an odd greenish-yellow backlight, which accounts for the lemon-lime background color. The display area is about 1x3 inches. I've just managed to get my interface code for it working - I've been using these for years, but with a different fambly of microcontrollers, and have just now gotten around to writing the code for the AVR MCUs. Now that I have it going, what can I not achieve?
The text extends a greeting to the almost-absurdly-beloved Japanese cartoon character Totoro, whose name is one of the few katakana words I know. (I highly recommend the movie My Neighbor Totoro. If you haven't seen it, check it out - it's beautiful, beautiful work and one of the sweetest films I've ever seen.)
カワイイ!
Electronics factory workers, Cikarang, Indonesia © ILO/Asrian Mirza
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License. To view a copy of this license, visit creativecommons.org/licenses/by-nc-nd/3.0/igo/deed.en_US.
Electronics cabinet. Receiver, lighting control relay, mac mini (audio and video server), and RF remote control system. Not visible is the ventilation system, near the top of the cabinet.
Electronics factory worker, Cikarang, Indonesia © ILO/Asrian Mirza
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 IGO License. To view a copy of this license, visit creativecommons.org/licenses/by-nc-nd/3.0/igo/deed.en_US.
■ LG 스마트홈 서비스인 스마트씽큐에 연동되는 기기늘려 스마트홈 생태계 확장
■ 10일 쉽고 편리한 사물인터넷 연동기기 3종 출시
□ 스마트폰으로 켜고 끄고, 밝기 조절도 가능한 ‘스마트 전구’
□ 가전 제품의 사용 전기량을 실시간으로 알려주는 ‘스마트 플러그’
□ 실내의 사람, 동물 등의 움직임을 감지하고 기록하는 ‘모션 센서’
■ LG전자 H&A스마트솔루션BD 류혜정 상무 “쉽고 간편하게 사용할 수 있는 차별화된 스마트홈 서비스로 융복합 시대를 선도할 것”이라고 강조
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