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Another LED Q
Sorry the last post was so long thanks to anyone who answers it. Here's another simpler one. I'm creating a toggle switch for a fan and a few other things. The current going trough the line I'm
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Jayson Woodruff
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#197
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LEDs and relays in Autos
Hey Guys, I'm new here and have only very basic knowledge of electronics. I have several wiring projects going on with my truck and will ask mostly that. See a little bio at the end. I saw some post
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Jayson Woodruff
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#196
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Re: low voltage a/c amplifier
The only specs that i need to meet is I need to keep my a/c freq. in tact after upping the voltage. I picked up a lm741 from radio shack and I will try it. Is there a reason you say to use closed loop
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bbranham@...
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#195
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Re: low voltage a/c amplifier
Hi , I hope that Op-amp will work great in this case... Or is there any thing you want specific... If not read the data sheet of 741 used in closed-loop-gain mode... Regards ===== Himanshu Sharma
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Himanshu Sharma <hs_ramdev@...>
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#194
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low voltage a/c amplifier
Anyone have an idea for a low voltage a/c amplifier to use for input into a freq to voltage converter. My input is 1-8mv a/c and I need to bump it up to a min of 1volt and a max 28volts. Anyone with a
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bbranham@...
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#193
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Re: Need some help
Hi Try and learn about how a 555 IC works as that will solve the problem for you... If you have enough time then I can make the circuit for you....... just to make it easy let me tell you that main
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Himanshu Sharma <hs_ramdev@...>
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#192
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Re: Shift-register and synchronous counters
You can convert a ring counter to a johnson counter by aiming a gun at his head and smooth talking him. <html></html>
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Ed Jacobson <enj99@...>
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#191
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Re: Shift-register and synchronous counters
Yes - what exactly is it that you need explained? - What a flip-flop is? - How a flip-flop works? - Cascading flip-flops? - How to interface the counter circuit to real-life? Why do you need to count
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Jonathan Luthje <jluthje@...>
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#190
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Need some help
My father has access to a little warehouse with pretty dangeorus stuff (sulphuric acid, CN, azotic acid, and lots of...) and the police asked him for an alarm... on every time the door will open...
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Gabriel Preda <gabriel_p@...>
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#189
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Re: Shift-register and synchronous counters
Hi , I don't find anything wrong with the soln.. to the problem... if you have any-other query then can you be a bit specific and write the problem in detail.... Regards Himanshu Sharma ===== Himanshu
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Himanshu Sharma <hs_ramdev@...>
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#188
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Re: Shift-register and synchronous counters
world of Still no one out there that can help me? Please I really need some help here. If this is the wrong group let me know so that I can browse more for one that can help me. Thank you which
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thecrack@...
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#187
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LED bargraph chips, comparators
None taken. I love electronics. But to get started in understanding basic stuff and making first projects, I wouldn't recommend re-inventing the wheel. Start with simple stuff and then work your way
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Tavys Ashcroft <bigtex@...>
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#186
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DC Transformers / Explained Visually Anywhere?
Hi, I'm working with small trains, Z scale and realize that I'll need to learn more than I know now (don't ask!) about the basics of dc. Specifically how a dc transformer works and how it affects / is
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jcubbin@...
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#185
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Re: Relay?
There are a couple of different ways of going about it, depending on how complex you want to get - the simplest way would involve using some kind of temperature sensor (e.g. RTC thermistor), a
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Jonathan Luthje <jluthje@...>
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#184
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Relay?
I'm trying to controll the temperature/air circulation in a room using a fan. The fan is rated 12VDC, 10A. What's the best way to control the fans with a PIC or a low-power switch? A high-power relay?
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sjohns10@...
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#183
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Re: light to sound kits
It sounds to me like you are trying to build a color organ. This is a device that divides a signal into frequency bands, say three, high, medium and low frequencies. This is done by filtering. The
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PDJ <phil@...>
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#182
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Re: light to sound kits
hi No offence... I always thought that many people enjoyed elecronics... I am trying to make a 2 bit processor outof transistors just for the sake to learn as this has more fun than assembling kits...
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Himanshu Sharma <hs_ramdev@...>
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#181
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Re: light to sound kits
Actually, what you describe sounds like an LED bargraph circuit. The LM3914 and LM3915 (national semiconductor) chips are great for this. They will light up an LED for each step increase in voltage.
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Tavys Ashcroft <bigtex@...>
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#180
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Re: light to sound kits
Hi , I am new to group.. but one suggestion i have to make is why not we share what we know rather than asking the questions.....:-) Hope that all of us have something to share... For your question
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Himanshu Sharma <hs_ramdev@...>
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#179
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light to sound kits
I've been trying to make one of those sound to light kits that flash lights in time to music. I've tried three different kits, followed the instructions, and can't get them to work. I realize I'm kind
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markallen <markallen@...>
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#178
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