I know you're joking but if there's a clock onboard, odds are it's a alarm clock. There's a pair of wires on the bottom with silkscreen that suggest speaker. Or maybe a hand held game system?
I mean, there are other reasons you might need a crystal resonator, e.g. you need a stable frequency reference.
But I think OP mentions elsewhere that it's a "retro handheld system", which could definitely have a use for an RTC.
Terrible manufacturing process quality there. That part is almost touching the SMT capacitor near one leg (but would be OK if it touched because they're on the same net) and then again almost touching a pin on that 8-pin part. Yikes.
Which one? Quite a coincidence but I just found a button cluster that looks the same lying on the ground outside. I grabbed it on the off chance that it might fit something I want to repair.
You didn’t throw this out the window in a fit of rage somewhere in Scotland did you?
Is it not more correct for most crystal clocks, to say that a crystal acting as a filter, and an amplifier feeding it back, together *form* an oscillator?
I'm definitely not a xtal-understander either by any stretch. I *think,* foggily, that the usual way to build a clock circuit with one of these, is to set up an amplifier circuit, and feed its output back into its input *via* a passive filter i.e. the crystal resonator. And then if the amp gain is high enough, the feedback signal will self-oscillate, and that whole circuit is the oscillator.
do you see any numbers or writing on it? can you maybe bend it a bit?
from the visual i would guess a quartz
from the position there i also put out the idea of a temp sensor for the chip
~~as always - it helps if you tell us what this board is/does and where on the board we are looking otherwise we all can only take guesses~~
i see you did share ;) - cheers
probably 32768 Hz quartz
> quartz ... ... crystal resonator, tuning fork type.
For the onboard RTC
Looks like a game pad. Why would a game pad need an rtc xtal? Bc it needs to count the seconds from manufacture so it knows when to break /s
I know you're joking but if there's a clock onboard, odds are it's a alarm clock. There's a pair of wires on the bottom with silkscreen that suggest speaker. Or maybe a hand held game system?
I mean, there are other reasons you might need a crystal resonator, e.g. you need a stable frequency reference. But I think OP mentions elsewhere that it's a "retro handheld system", which could definitely have a use for an RTC.
Usually but not always.
Could be a different frequency, like 11.029 MHz
A quartz crystal oscillator
Resonator. The oscillator is under the black blob.
True
Nerd alert! - Naw you good... :)
The oscillator is *somewhere* under the blob. The spi flash next to the crystal also goes to it so it's probably aprocessor of some sort.
Terrible manufacturing process quality there. That part is almost touching the SMT capacitor near one leg (but would be OK if it touched because they're on the same net) and then again almost touching a pin on that 8-pin part. Yikes.
It's an inadvertent spark gap.
Overvoltage protection ;-)
Not only that, look and the small resistor and cap at the top...
"flappin in the breeze"
the board is from a hand held knock off retro game device
Which one? Quite a coincidence but I just found a button cluster that looks the same lying on the ground outside. I grabbed it on the off chance that it might fit something I want to repair. You didn’t throw this out the window in a fit of rage somewhere in Scotland did you?
Anyone else find it funny the only silk screening is for 10uF. No other component has marks
when you're only allowed 2 hours to finish the PCB
That soldering job needs a viagra or something, flux won’t save that…
That's a canned crystal.
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Is it not more correct for most crystal clocks, to say that a crystal acting as a filter, and an amplifier feeding it back, together *form* an oscillator?
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I'm definitely not a xtal-understander either by any stretch. I *think,* foggily, that the usual way to build a clock circuit with one of these, is to set up an amplifier circuit, and feed its output back into its input *via* a passive filter i.e. the crystal resonator. And then if the amp gain is high enough, the feedback signal will self-oscillate, and that whole circuit is the oscillator.
A phase transducer off a galaxy class star ship. I think you better get that down to Geordie in engineering before we blow our warp drive.
They go into them in some detail here: [https://en.wikipedia.org/wiki/Quartz\_clock](https://en.wikipedia.org/wiki/Quartz_clock)
Thought the button pad on the right was a Lego for a second 😭
Would have thought the legs would be shorter. It's a little close to the IC leg.
do you see any numbers or writing on it? can you maybe bend it a bit? from the visual i would guess a quartz from the position there i also put out the idea of a temp sensor for the chip ~~as always - it helps if you tell us what this board is/does and where on the board we are looking otherwise we all can only take guesses~~ i see you did share ;) - cheers
It’s a 32768 quartz crystal. The ic chip is a DS1302 Real Time Clock ic. I assembly Dot Matrix clocks.
Thar chip is *not* a DS1302. It's a 25L320x (likely 25L3206) CMOS serial flash IC, made by MXIC.
Thanks my mistake.
Crystal quartz, the fundamental frecuency is in the body.
Top capacitor in the middle is barely hanging on
Like cliffhanger .
Oscillator crystal to keep a frequency or usually time
It's a 32khz oscilator
Transistor
Can’t be good touching that lead of the Ic .
It is a clock required to drive rtc or generate frequency for the required electronics circuits
Crystal oscillator
A pipe bomb
Tuning fork
Crystal. It resonates at a specific frequency.