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    Vacuum Tubes (Valves)

    It will be interesting if you can find info. Tubes I assume vulnerable to filament burnout, but magnetic fields are so much more weaker than electrostatic, even in a bomb....? So are the bombs capable of creating/ inducing enough current in a filament to burn them out ? Regards, Dana.
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    Vacuum Tubes (Valves)

    There must be some real data on this, still curious. Regards, Dana.
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    Vacuum Tubes (Valves)

    Is EMP strong enough to burn out filaments in tubes ? Eg, the Armageddon belief tubes survive ? Regards, Dana.
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    I Need a Device that Can Tell a PC the State of Relay Contacts

    Take a look at Tuniot on a ESP8266 pr ESP32. Simple to build client server applications. https://www.edaboard.com/threads/verizon-remote-hotspot-controller.400349/ https://www.edaboard.com/threads/gui-codeless-processor-design.397358/#post-1708529 Regards, Dana.
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    how many watt resistor do i need for 2 volts 1 ohm

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    Using a PIR to both turn on and turn off LEDs

    Take a look here : https://www.amazon.com/s?k=latching+relay&crid=T2QAZIVYE5NM&sprefix=latching+relay%2Caps%2C212&ref=nb_sb_noss_1 Regards, Dana.
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    Using a PIR to both turn on and turn off LEDs

    Latching relays can, on a pulse, turn on, latch, then not until next pulse comes turn off, again latching in that state, rinse and repeat..... So they will work https://www.electrical4u.com/latching-relay/...
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    Modern Day Use for Old Electronics vs New Electronics. Is it Realistic & Practical?

    John, the old stuff, especially in power area, eg. IGBTs, Power Mosfets, modules like h bridge, used in motor, welding, cutting, actuator will be with us for a long time, or so I think. Have you tried GUI block programming ? See post #26 here, I use it a lot for one off low end rapid designs, C...
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    Can't Identify Components in Old Guitar Amplifier

    Great ref material https://alliedcatalogs.com/index.htm Carbon R's in old gear usually out of spec, especially ones that run hot, such as Cathode and Plate R's, power supply V dropping R's, screen grid R's. Regards, Dana.
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    Using a PIR to both turn on and turn off LEDs

    https://maker.pro/forums/threads/using-a-pir-to-turn-a-light-off.285869/ Or a latching relay. https://uk.rs-online.com/web/content/discovery/ideas-and-advice/latching-relays-guide Regards, Dana.
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    Led light turn on at specific Voltage

    Zener approach : https://www.electro-tech-online.com/threads/led-light-turn-on-at-specific-voltage.165657/#post-1446029 Regards, Dana.
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    Selenium rectifier?

    Did a Google image search on your part, will let you wade thru results ...
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    Transformers simulation

    The transformer is 110 Vac to 12 Vac, and typically then rectified and regulated to 12 Vdc. But it can be used in reverse, 12 Vac to 110 Vac, rectified and regulated to 110 Vdc..... So primary is typically energy or signal source, secondary load side. Regards, Dana.
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    About AT29C010A help please

    Here is datasheet : https://media.digikey.com/pdf/Data%20Sheets/Atmel%20PDFs/AT29C010A.pdf One could write some code using an Arduino Mega board to extract data..... Regards, Dana.
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    Micro USB Bulk Power Supply

    Buy adapter plugs. Not sure of quality...
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    Transformers simulation

    SIMetrix : Regards, Dana.
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    Traffic Signal DLD Project

    For future reference here is a way of doing traffic control with a state machine. Stay with your current project, just tuck this away in back of your mind for new possibilities. Regards, Dana.
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    Mixing output from 3 op amps

    Post your simulation
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    Hitachi 57F710E Power Issue

    Lift one leg of the diode connected to secondary.... Regards, Dana.
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    Problems with my school project Automatic ON OFF lamp using LDR and MOSFET

    Old Post I just recognized.
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