How are current sources made if they have to supply 50A or 500A or more? Are there such things as switchmode constant current sources? Any reading (or links) on this subject would be of great help.
I have 220V 800W toroidal tranformer. Output is 36V. I want to use this for various experiments. I wish that it would be impossible to ruin transformer by accidental short circuit or overcurrent. I think of powering the transformer through relay and wiring some analog circuitry that detects...
I have three microcontroller boards connected between two devices. Data flows through these boards from one device to another. Some calculations and transformations are done with data flow.
I do not go to details as this probably is not important. For testing i used LPT port of PC 1 as sending...
Does anyone know why such a strange clock frequency as 14.31818 was used in old PC-s?
This information is not practical value for me. I am just curious.
Raivo
I deicded to experiment a bit with linear CCD-s. I have some Toshiba and NEC sensors and also got datasheets. Still it seems that i need more understanding what all these clock pulses are for. Usually at least 4 different clocks (such as phi1, phi2, RS, BT) must be supplyed and it seems that...
Do you know of simple ways to measure low frequency electromagnetic noise in environment? I encountered this problem when designing some basic bioelectric transducers. I understand that sensitivity to such noises can be minimised when using differential amplifiers and 50/60Hz filters but...
Does anyone have data sheet or at least pin descriptions of old PCM codec 2910 or 2911. These were made by Intel (prefix D) and TI (prefix TCM) ten years ago and were widely used on various digital phone systems. Hoping someone can help me with data sheet!
Many thanks,
Raivo
I need microcontroller with integrated AD & DA converter serial & parallel IO and external bus with some kind of DMA capability. Address space must be at least 4 megs. And this chip must be available in socketable package (like PLCC or PGA). Any suggestions? I know, Toshiba makes such micros but...
All my microcontroller projects so far use static RAM for external memory. Now i want to try dynamic RAM in one project.
I have, maybe silly, question. Is it enough for reliable DRAM refresh to simply read data from every
row within specified refresh interval? If so then i can simply use...
Does anyone know how 3.3V device can be connect to 5 V bus?
I need to use 3.3V (SmartMedia) memory cards with one microcontroller system that works only on 5V. 3.3V power is easy to make but are there some chips or some simple tricks for connecting two buses with different voltages?
Raivo Nael
