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Re: dimming a transformer
Thanks for the useful info! I used the triggering method described in ST AN308, but as I found no schematic, I built my own controller.
It operates between 0-180 phase angles, and unlike a standard dimmer, sends a series of pulses after the set angle. The pulses are...
Re: dimming a transformer
I thought of a sliding tap, but I'd like to use the existing transformer and
housing, only add a potmeter and a triac-based controller.
I could even program a microcontroller for this task if I'd know how to
control the triac.
Re: dimming a transformer
It is not a good idea because of the varying inductive load. It can produce a DC component on the transformer and it can catch a fire.
Yet I have no idea how inductive the transformer is when it is loaded. But when empty, it is surely inductive.
dimming a transformer
I would like to find schematics for dimming on the primary winding of an 50W transformer. It seems that halogen dimmer schematics would be suitable, but did not find any :-(
The transformer secondary is 1.5-3VAC, so it is hard to effectively dim on this side.
double tuned discriminator
Thank you for the answers.
Actually linearity is not important, because it is an FSK not an FM demodulation. I could use LC tank as well, but I wanted to design the receiver with no tuning needed at all. Unfortunately I don't find a source for a 10.7MHz...
ca3189 am receiver circuits
The Microchip rfrxd0420 superheterodyne receiver datasheet
(ww1.microchip.com/downloads/en/DeviceDoc/70090a.pdf) shows a 10.7MHz ceramic discriminator needed for FSK demodulation of signal. As I read, a discriminator is essentially a resonator.
Can I use a...
16f84a watchdog
It's possible, only the prescaler is shared between them. Be sure to use the sequence written in the datasheet to setup the prescaler or you'll get a reset even before your program is started.
how to make a pic programmer hardware
I'd recommend a Dtait serial programmer, because it is cheap&easy but correct (not like JDM) hardware-wise. A lots of programmers support it, so you won't be stuck with it.
Free programmers: ic-prog, winpicprog
Supporting a new type of PIC is a question...
18f458.lkr
Create a project (project/new) and in the project files area select the root node (HEX file). Click node properties, select MPLINK as language tool. Enter appropriate linker file name (eg 18f458.lkr) into additional command line options. Close window. Click add node to add all the...
Re: Tell what to use better
still if you want to stay with 16f676, you can use lower voltages, eg 3V instead of 5V or use SLEEP (power down unused peripherials) when doing nothing: delays, waiting for button presses.
Use lower clock speed if you can, or use adjustable clock frequency.
Unused...
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