#555timer — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #555timer, aggregated by home.social.
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Everyone knows the versatile 555 timer chip, introduced by Signetics in 1971, and second-sourced or cloned by nearly every semiconductor company that ever made analog ICs.
Somehow, it wasn't until today that I learned of the National Semiconductor LM122/LM322/LM2905/LM3905 timer chip, apparently the "also ran" of IC timer chips.
National Semiconductor, had, like everyone else, offered their own 555, called the LM555, still made by their successor and once-competitor, Texas Instruments.
#555timer -
Everyone knows the versatile 555 timer chip, introduced by Signetics in 1971, and second-sourced or cloned by nearly every semiconductor company that ever made analog ICs.
Somehow, it wasn't until today that I learned of the National Semiconductor LM122/LM322/LM2905/LM3905 timer chip, apparently the "also ran" of IC timer chips.
National Semiconductor, had, like everyone else, offered their own 555, called the LM555, still made by their successor and once-competitor, Texas Instruments.
#555timer -
555 timer Integrated Circuit
This gem is now 55 years old! A wonderful history is described in this vid.
Naturally I also looked in the wikipedia and Encyclopedia Britannica to find goodies of the time this wonderful timer was build. Since no patent was filed you can find a billion versions of it, which is a nice variant on the patent theme
Wikipedia states
The timer IC was designed in 1971 by Hans Camenzind under contract to Signetics.[3] In 1968, he was hired by Signetics to develop a phase-locked loop (PLL) IC. He designed an oscillator for PLLs such that the frequency did not depend on the power supply voltage or temperature. Signetics subsequently laid off half of its employees due to the 1970 recession, and development on the PLL was thus frozen.[6] Camenzind proposed the development of a universal circuit based on the oscillator for PLLs and asked that he develop it alone, borrowing equipment from Signetics instead of having his pay cut in half. Camenzind's idea was originally rejected, since other engineers argued the product could be built from existing parts sold by the company
We are sure glad marketing was on good insticts then
The first design for the 555 was reviewed in the summer of 1971.[8] After this design was tested and found to be without errors, Camenzind got the idea of using a direct resistance instead of a constant current source, finding that it worked satisfactorily.[8] The design change decreased the required 9 external pins to 8, so the IC could be fit in an 8-pin package instead of a 14-pin package.[8] This revised version passed a second design review, and the prototypes were completed in October 1971 as the NE555V (plastic DIP) and SE555T (metal TO-5).[9] The 9-pin version had already been released by another company founded by an engineer who had attended the first review and had retired from Signetics; that firm withdrew its version soon after the 555 was released. The 555 timer was manufactured by 12 companies in 1972, and it became a best-selling product.[6]
Quite neat this was for us electronic tinkerers and engineers
The 555 found many applications beyond timers. Camenzind noted in 1997 that "nine out of 10 of its applications were in areas and ways I had never contemplated. For months I was inundated by phone calls from engineers who had new ideas for using the device."[8]
sources
https://en.wikipedia.org/wiki/555_timer_IC
https://www.youtube.com/watch?v=6JhK8iCQuqI
#electronics #timer #timer555 #555timer #IC #engineering #mathematics #physics #no #TV
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555 timer Integrated Circuit
This gem is now 55 years old! A wonderful history is described in this vid.
Naturally I also looked in the wikipedia and Encyclopedia Britannica to find goodies of the time this wonderful timer was build. Since no patent was filed you can find a billion versions of it, which is a nice variant on the patent theme
Wikipedia states
The timer IC was designed in 1971 by Hans Camenzind under contract to Signetics.[3] In 1968, he was hired by Signetics to develop a phase-locked loop (PLL) IC. He designed an oscillator for PLLs such that the frequency did not depend on the power supply voltage or temperature. Signetics subsequently laid off half of its employees due to the 1970 recession, and development on the PLL was thus frozen.[6] Camenzind proposed the development of a universal circuit based on the oscillator for PLLs and asked that he develop it alone, borrowing equipment from Signetics instead of having his pay cut in half. Camenzind's idea was originally rejected, since other engineers argued the product could be built from existing parts sold by the company
We are sure glad marketing was on good insticts then
The first design for the 555 was reviewed in the summer of 1971.[8] After this design was tested and found to be without errors, Camenzind got the idea of using a direct resistance instead of a constant current source, finding that it worked satisfactorily.[8] The design change decreased the required 9 external pins to 8, so the IC could be fit in an 8-pin package instead of a 14-pin package.[8] This revised version passed a second design review, and the prototypes were completed in October 1971 as the NE555V (plastic DIP) and SE555T (metal TO-5).[9] The 9-pin version had already been released by another company founded by an engineer who had attended the first review and had retired from Signetics; that firm withdrew its version soon after the 555 was released. The 555 timer was manufactured by 12 companies in 1972, and it became a best-selling product.[6]
Quite neat this was for us electronic tinkerers and engineers
The 555 found many applications beyond timers. Camenzind noted in 1997 that "nine out of 10 of its applications were in areas and ways I had never contemplated. For months I was inundated by phone calls from engineers who had new ideas for using the device."[8]
sources
https://en.wikipedia.org/wiki/555_timer_IC
https://www.youtube.com/watch?v=6JhK8iCQuqI
#electronics #timer #timer555 #555timer #IC #engineering #mathematics #physics #no #TV
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5:55 video released on May 5th for the 55th birthday of the 555
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5:55 video released on May 5th for the 55th birthday of the 555
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Someone here mentioned that the #555timer was designed 55 years ago https://en.wikipedia.org/wiki/555_timer_IC So I guess that makes 5/5 #555timerday!
#TinkerCAD .com can simulate this quite nicely - No real breadboard required.
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Someone here mentioned that the #555timer was designed 55 years ago https://en.wikipedia.org/wiki/555_timer_IC So I guess that makes 5/5 #555timerday!
#TinkerCAD .com can simulate this quite nicely - No real breadboard required.
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EEVblog celebrates the ancient 555 timer's birthday like it's a sacred relic 🕰️, while #YouTube and Google are gleefully counting down to 2026 to bless us with yet another update we'll never understand. 🎉 Seriously, who knew silicon could get so nostalgic? 😆
https://www.youtube.com/watch?v=6JhK8iCQuqI #EEVblog #555timer #nostalgia #techupdates #siliconcelebration #HackerNews #ngated -
EEVblog celebrates the ancient 555 timer's birthday like it's a sacred relic 🕰️, while #YouTube and Google are gleefully counting down to 2026 to bless us with yet another update we'll never understand. 🎉 Seriously, who knew silicon could get so nostalgic? 😆
https://www.youtube.com/watch?v=6JhK8iCQuqI #EEVblog #555timer #nostalgia #techupdates #siliconcelebration #HackerNews #ngated -
EEVblog: The 555 Timer is 55 years old
https://www.youtube.com/watch?v=6JhK8iCQuqI
#HackerNews #EEVblog #555Timer #electronics #history #vintageTech
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EEVblog: The 555 Timer is 55 years old
https://www.youtube.com/watch?v=6JhK8iCQuqI
#HackerNews #EEVblog #555Timer #electronics #history #vintageTech
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The 555 timer is now 55 years old. I've had some fun with these. How about you?
https://www.youtube.com/watch?v=6JhK8iCQuqI
#electronics #555timer -
Me: Why the hell is this opamp drawing half an amp when I turn it on?
Also me, later: Oh. Because it's a 555 timer...
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Me: Why the hell is this opamp drawing half an amp when I turn it on?
Also me, later: Oh. Because it's a 555 timer...
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New video (also the final one for this year)! I found a strange Hi-Fi component on the side of the road and am taking a closer look at it.
YouTube: https://youtu.be/gq-dF1hvItI
PeerTube: https://makertube.net/w/gaDpLnnWF4ehMRq8zvH4X7#Pioneer #DT555 #DigitalAudioTimer #Repair #Restoration #555Timer #Oddity #AudioGear #Hifi #VintageAudio #VintageHifi
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New video (also the final one for this year)! I found a strange Hi-Fi component on the side of the road and am taking a closer look at it.
YouTube: https://youtu.be/gq-dF1hvItI
PeerTube: https://makertube.net/w/gaDpLnnWF4ehMRq8zvH4X7#Pioneer #DT555 #DigitalAudioTimer #Repair #Restoration #555Timer #Oddity #AudioGear #Hifi #VintageAudio #VintageHifi
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A Navajo weaving of an integrated circuit: the 555 timer
https://www.righto.com/2025/09/marilou-schultz-navajo-555-weaving.html
#HackerNews #NavajoWeaving #IntegratedCircuit #555Timer #TechArt #CulturalHeritage
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A Navajo weaving of an integrated circuit: the 555 timer
https://www.righto.com/2025/09/marilou-schultz-navajo-555-weaving.html
#HackerNews #NavajoWeaving #IntegratedCircuit #555Timer #TechArt #CulturalHeritage
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@bengakai Congrats! Well done! 👍 #electronics #555Timer
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@bengakai Congrats! Well done! 👍 #electronics #555Timer
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Built my first little 555 astable timer today ⏱️⚡
Just a humble LED blinker, but it feels like magic when the circuit comes alive.
Maybe this is the start of my journey into electronics and 8-bit retro computing.
#Electronics #555Timer #RetroComputing #Maker -
Built my first little 555 astable timer today ⏱️⚡
Just a humble LED blinker, but it feels like magic when the circuit comes alive.
Maybe this is the start of my journey into electronics and 8-bit retro computing.
#Electronics #555Timer #RetroComputing #Maker -
2025 One Hertz Challenge: Digital Clock Built With Analog Timer - You can use a microcontroller to build a clock. After all, a clock is just somethi... - https://hackaday.com/2025/08/13/2025-one-hertz-challenge-digital-clock-built-with-analog-timer/ #clockhacks #arduinouno #555timer #clock
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2025 One Hertz Challenge: Digital Clock Built With Analog Timer - You can use a microcontroller to build a clock. After all, a clock is just somethi... - https://hackaday.com/2025/08/13/2025-one-hertz-challenge-digital-clock-built-with-analog-timer/ #clockhacks #arduinouno #555timer #clock
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2025 One Hertz Challenge: Digital Clock Built With Analog Timer https://hackaday.com/2025/08/13/2025-one-hertz-challenge-digital-clock-built-with-analog-timer/ #clockhacks #ArduinoUno #555timer #clock #555
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2025 One Hertz Challenge: Digital Clock Built With Analog Timer https://hackaday.com/2025/08/13/2025-one-hertz-challenge-digital-clock-built-with-analog-timer/ #clockhacks #ArduinoUno #555timer #clock #555
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2025 One Hertz Challenge: 555 Timer Gets a Signal From Above - One of the categories we chose for the One Hertz Challenge is “Could Have Used a 5... - https://hackaday.com/2025/07/24/2025-one-hertz-challenge-555-timer-gets-a-signal-from-above/ #2025hackadayonehertzchallenge #microcontrollers #allandeviation #timekeeping #contests #hardware #555timer #gpsdo #gps
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2025 One Hertz Challenge: 555 Timer Gets a Signal From Above - One of the categories we chose for the One Hertz Challenge is “Could Have Used a 5... - https://hackaday.com/2025/07/24/2025-one-hertz-challenge-555-timer-gets-a-signal-from-above/ #2025hackadayonehertzchallenge #microcontrollers #allandeviation #timekeeping #contests #hardware #555timer #gpsdo #gps
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2025 One Hertz Challenge: 555 Timer Gets a Signal From Above https://hackaday.com/2025/07/24/2025-one-hertz-challenge-555-timer-gets-a-signal-from-above/ #2025HackadayOneHertzChallenge #Microcontrollers #allandeviation #timekeeping #contests #hardware #555timer #gpsdo #gps
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2025 One Hertz Challenge: 555 Timer Gets a Signal From Above https://hackaday.com/2025/07/24/2025-one-hertz-challenge-555-timer-gets-a-signal-from-above/ #2025HackadayOneHertzChallenge #Microcontrollers #allandeviation #timekeeping #contests #hardware #555timer #gpsdo #gps
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Jan Beta Makes A Simple 555 Based Logic Probe
#C64 #Commodore64 #555Timer #LogicProbe #ElectronicsDIY #CircuitBuilding #Instructables #ElectronicsTutorial #ILC555 #NE555 #DIYProjects #TestEquipment
https://theoasisbbs.com/jan-beta-makes-a-simple-555-based-logic-probe/?feed_id=1024&_unique_id=677bea5ce5c1e -
Jan Beta Makes A Simple 555 Based Logic Probe
#C64 #Commodore64 #555Timer #LogicProbe #ElectronicsDIY #CircuitBuilding #Instructables #ElectronicsTutorial #ILC555 #NE555 #DIYProjects #TestEquipment
https://theoasisbbs.com/jan-beta-makes-a-simple-555-based-logic-probe/?feed_id=1024&_unique_id=677bea5ce5c1e -
Making a Simple 555 Based Logic Probe
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Making a Simple 555 Based Logic Probe
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New video! I'm building a simple 555 timer based logic probe from spare parts I had laying around.
YouTube: https://youtu.be/NhgjBUmnA7k
PeerTube: https://makertube.net/w/cuUPCfYmzMeL8DkFuXgW2a#LogicProbe #DIYLabEquipment #LogicTester #NE555 #555Timer #Circuit #Schematics #DIY #Homemade #Electronics #Tinkering
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New video! I'm building a simple 555 timer based logic probe from spare parts I had laying around.
YouTube: https://youtu.be/NhgjBUmnA7k
PeerTube: https://makertube.net/w/cuUPCfYmzMeL8DkFuXgW2a#LogicProbe #DIYLabEquipment #LogicTester #NE555 #555Timer #Circuit #Schematics #DIY #Homemade #Electronics #Tinkering
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Flashy Paper Christmas Tree Does It With a 555 https://hackaday.com/2024/12/13/flashy-paper-christmas-tree-does-it-with-a-555/ #4017decadecounter #christmastree #decadecounter #HolidayHacks #transfertape #555timer #4017 #555 #smt
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Flashy Paper Christmas Tree Does It With a 555 https://hackaday.com/2024/12/13/flashy-paper-christmas-tree-does-it-with-a-555/ #4017decadecounter #christmastree #decadecounter #HolidayHacks #transfertape #555timer #4017 #555 #smt
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Flashy Paper Christmas Tree Does It With a 555 - ‘Tis the season for holiday hacks, and [Ben Emmett] is here to remind us that we d... - https://hackaday.com/2024/12/13/flashy-paper-christmas-tree-does-it-with-a-555/ #4017decadecounter #christmastree #decadecounter #holidayhacks #transfertape #555timer #smt
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Flashy Paper Christmas Tree Does It With a 555 - ‘Tis the season for holiday hacks, and [Ben Emmett] is here to remind us that we d... - https://hackaday.com/2024/12/13/flashy-paper-christmas-tree-does-it-with-a-555/ #4017decadecounter #christmastree #decadecounter #holidayhacks #transfertape #555timer #smt
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Using the 555 for Everything - The 555 timer is one of the most versatile integrated circuits available. It can g... - https://hackaday.com/2024/10/14/using-the-555-for-everything/ #microcontroller #circuitdesign #hardware #555timer
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Using the 555 for Everything - The 555 timer is one of the most versatile integrated circuits available. It can g... - https://hackaday.com/2024/10/14/using-the-555-for-everything/ #microcontroller #circuitdesign #hardware #555timer
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Building An Automotive Load Dump Tester - For those who have not dealt with the automotive side of electronics before, it co... - https://hackaday.com/2024/10/13/building-an-automotive-load-dump-tester/ #manhattanconstruction #discretedesign #automotive #compliance #amplifier #hardware #555timer #loaddump #pulse
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Building An Automotive Load Dump Tester - For those who have not dealt with the automotive side of electronics before, it co... - https://hackaday.com/2024/10/13/building-an-automotive-load-dump-tester/ #manhattanconstruction #discretedesign #automotive #compliance #amplifier #hardware #555timer #loaddump #pulse
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Building An Automotive Load Dump Tester https://hackaday.com/2024/10/13/building-an-automotive-load-dump-tester/ #manhattanconstruction #discretedesign #automotive #compliance #amplifier #hardware #555timer #loaddump #pulse
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Building An Automotive Load Dump Tester https://hackaday.com/2024/10/13/building-an-automotive-load-dump-tester/ #manhattanconstruction #discretedesign #automotive #compliance #amplifier #hardware #555timer #loaddump #pulse
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The book shop has a magazine on sale from 2022. Not sure whether it's a reprint but I'm awfully tempted to buy it because of an article about the NE555. #555timer
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The book shop has a magazine on sale from 2022. Not sure whether it's a reprint but I'm awfully tempted to buy it because of an article about the NE555. #555timer
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Bringing the 555 Mini-Notebook to Video https://hackaday.com/2024/07/10/bringing-the-555-mini-notebook-to-video/ #engineer'smini-notebook #electronicstutorials #engineer'snotebook #tutorialvideo #classichacks #forrestmims #PCBHacks #555timer
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Bringing the 555 Mini-Notebook to Video https://hackaday.com/2024/07/10/bringing-the-555-mini-notebook-to-video/ #engineer'smini-notebook #electronicstutorials #engineer'snotebook #tutorialvideo #classichacks #forrestmims #PCBHacks #555timer
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Bringing the 555 Mini-Notebook to Video - Like many of us [AnotherMaker] is a fan of the classic Forrest Mims electronics bo... - https://hackaday.com/2024/07/10/bringing-the-555-mini-notebook-to-video/ #engineersmini-notebook #electronicstutorials #engineersnotebook #tutorialvideo #classichacks #forrestmims #pcbhacks #555timer