Crystals Oscillators and Usage

Started by Zv_oDD in sci.electronics.basics8 years ago 4 replies

So I'm playing with a AVR PiC, the ATMEGA32. And its needs 16mhz crystal hooked to it like so: http://tinypic.com/r/ei9im9/5 Note; I used a...

So I'm playing with a AVR PiC, the ATMEGA32. And its needs 16mhz crystal hooked to it like so: http://tinypic.com/r/ei9im9/5 Note; I used a Cap and Inductor pair for the crystal symbol. I am just wondering what is the role of the capacitors? Can I use 1uf caps instead and still get 16Mhz?


Where to buy crystals?

Started by DaveC in sci.electronics.basics7 years ago 10 replies

I need a 2-pin crystal, 8.86723 (PAL video standard). Where do you get these now? Seems nobody carries them, not even ham radio shops. I'd...

I need a 2-pin crystal, 8.86723 (PAL video standard). Where do you get these now? Seems nobody carries them, not even ham radio shops. I'd visit a ham swap meet but I can't wait. I can get them from Ireland... Any sources in the States? Thanks. (I'm in N. California.)


Crystal load?

Started by DaveC in sci.electronics.basics7 years ago 11 replies

I'm ordering a 2-pin crystal (8.86723 MHz) and need to specify the load. A little help calculating this,...

I'm ordering a 2-pin crystal (8.86723 MHz) and need to specify the load. A little help calculating this, please? http://www.tinyuploads.com/images/yr8Paq.jpg Thanks!


Soldering newbie

Started by M. Hamed in sci.electronics.basics7 years ago 51 replies

I am not new to soldering. I have some soldering experience. I have built a= radio kit with no soldering problems whatsoever. I have made little...

I am not new to soldering. I have some soldering experience. I have built a= radio kit with no soldering problems whatsoever. I have made little boards= for things like transistor amplifiers for my crystal radio. I have little = surface mount experience, but in a moment of extreme courage, my boss let m= e rework about 50 PCBs at once when he was on vacation. That involved solde= ring a lit...


Faux MOSFET... Behavioral Modeling

Started by Jim Thompson in sci.electronics.basics6 years ago 5 replies

For sometime now I have been trying to build a behavioral model of logic gates that was consistent with real-world behavior when mixed into an...

For sometime now I have been trying to build a behavioral model of logic gates that was consistent with real-world behavior when mixed into an Analog environment. (Existing logic models, such as those in PSpice and LTspice are state machines and do not behave properly when used for Analog applications, such as when you build a crystal oscillator around a 74HCU04.) So I now invite you to ...


Critic of circuit before I build it.

Started by amdx in sci.electronics.basics5 years ago 21 replies

I'm about to build this circuit to compare output from different ferrite receive antennas. I will be using it with the the FET...

I'm about to build this circuit to compare output from different ferrite receive antennas. I will be using it with the the FET amplifier referenced at the bottom of the page, so the input impedance is not a concern. I'm mostly interested in the DC output to monitor signal levels. AM band frequencies. http://www.crystal-radio.eu/diodedetector/endiodedetector.htm Any fix for the si...


Weight of electronic equipment

Started by Veek M in sci.electronics.basics4 years ago 22 replies

I'm importing some electronic parts/equipment (1kg worth) and wanted to compute a reasonable estimate of shipping costs - could someone weigh...

I'm importing some electronic parts/equipment (1kg worth) and wanted to compute a reasonable estimate of shipping costs - could someone weigh their parts and post the values. What are the weights of various types of: Through-hole components: diode, capacitor, inductors, transistor, ICs, crystal, LED, ferrite cores-beads, Potentiometers, Trimpots, Photodiodes/IR, microprocessors, ...


12 volts to 48 volts for an electric bicycle

Started by Anonymous in sci.electronics.basics7 years ago 33 replies

I got a used 36-volt Crystalyte hub motor and controller from Craigslist. (The guy who sold it to me said they can take 72 volts, but I'm still...

I got a used 36-volt Crystalyte hub motor and controller from Craigslist. (The guy who sold it to me said they can take 72 volts, but I'm still trying to confirm that from their website, which is a bit skimpy. Looks like I'll have to email them.) Motor = 400 X4 (408) http://www.crystalyte.com/ I tried 48V (4x 12v SLA batteries, 8 A-h each), and the bike worked fine for about 3 miles, but ...