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Hi
Maybe you have noticed I edited my previous message about MOC3021 after the first write.
I was wrong about it is a zero voltage switching type: it isn't. And it can't be, otherwise it can't does phase dimming!
Such kind of optocoupler is better called "zero crossing" (see for example MOC3031...
According to the pin connections on the picture, the ic SEEMS to be a PIC12 series microcontroller (I see GND goes to pin 8, +5V Vdd COULD go to pin 1 and a 10K resistor is placed between +Vdd and pin 4 that is MCLR on PIC12xxxx). I can't read the IC marking so of course it can be another...
This isn't what I was looking for.
I hoped it is possible mimic the decaying sounds spectrum with PWM's square wave and some kind of frequency or duty cycle modulation.
Thanks so much anyway for your effort
PS: By The Way: how is the spectrum of such decaying sounds ?
Do anyone knows if is it possible synthetizing (no pre-recorded sounds play) with reasonable precision (e.g. acceptable audio quality) decaying sounds like bells, carillons, gongs etc with mcu's PWM only ?
I mean no external programmable amplifiers or so, at least just a passive filter.
Some...
Re: ICD2 CLONE from SureElectronic - replacing firmware TROU
On another forum a user noticed I have selected 18F4450 instead of 18F4550 :oops: ... (no comment, PLEASE)
The GOOD news: selecting the RIGHT device flash reprogramming is OK :D
The BAD news: now MPLAB recognize ICD2 but it doesn't...
Hello to all, sorry for bothering with an old problem.
I have an ICD2 clone from SureElectronics, purchased in 2008.
**broken link removed**
Since first use he shows its tendence to lose 18f4550 firmware.
At first I was able to reprogram it with the Hex file received from Sure Electronics
(...
Native bootloader
Hi all
Anyone knows if there exist a MPU straight loadable using a simply serial connection without programming before on it a bootloader :?:
Thanks in advance
volume high tv switched on
Hi all
Some time ago I repaired an old 16" Philips CRT TV (CTX chassis, 16CT22.....something).
It has battery backup for settings and no default settings memory (e.g. green button).
When switched on, volume is extremely high and there is no way to set a lower...
Success !! :D :D :D
Sorry for talking over myself, but this is a GOOD news.
I was able to reflash the 18f4550 with picstart+, some short wires from zif socket to soldered female pins on clone pcb, and my good old desktop PC (it has serial ports) with a MPLAB v7.50 installation (indeed the...
connecting icd 2 to board
Ok, SureElectronics just send me the hex file for the 18f4550 and explain that J2 connector is for its ICSP (indeed are just 5 pads, I have to solder molex or more probably socket pins to stay under the case cover comfortably), according to them 16F877 needs no...
icd2 clone vista
Last minute: SureElectronics replied to my help:
"... According to your information, the hex file in flash may be lost.
Do you have another programmer that could reprogram the MCU
18F4550 on board? We could send you the hex file and some
instruction to fix it."
Since I have...
usb icd2 pcb
Thanks a lot for your interesting, but I have to say that ICD2 clone I received have no pushbutton, only the 3 led, so no way.
I'm reluctant to open the case since I have just contacted the manufacturer asking for help, maybe for a replace,
so I can't show you how this device is...
pickit 2 clone reloaded
just tried on another notebook (with Vista) on 2 different usb ports: no signal from computer, Power green light on, but error red light on too :cry:
It seems to connect a simple target board doesn't solve :cry: :cry:
MazE
icd-2 clone usb
I think is a good idea.
Clone have no external power supply, but I want try an external powered usb hub.
But why there was no overload on the first time I plug clone on the usb ?
And I have always overload on the usb when I plug my mouse (It have an illuminated wheel as extra...
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