jippie

Eindhoven, Netherlands

wirespeed.xs4all.nl/mediawiki

Age: 44

Do you love your Pets as much as I do? Check the Q&A proposal!

I'm into:

  • Linux;
  • Networking;
  • IT Security;
  • Perl;
  • System integration;
  • Arduino;
  • ATtiny & ATmega Microcontrollers;
  • Analog electronics;
Dec
16
awarded Notable Question
Dec
15
comment Dimmer Tutorial Using Diac and Triac
The proposed circuit will work perfectly for incandescent light bulbs, the result with fluorescents will be disappointing. Is it possible to change light bulbs? A dimmer for fluorescent light bulbs will be a fair bit more complex, hence the learning curve will be a lot steeper.
Dec
13
comment Relay not switching immediately from switching power supply to battery backup
Oh wait the relay vendor does: Our products are not fault-tolerant and are not designed, manufactured or intended for use or resale as on-line control equipment in hazardous environments requiring fail-sale perfor- mance, such as in the operation of nuclear facilities, aircraft navigation or communication systems, air traffic control, direct life support machines, or weapons systems, in which the failure of the product could lead directly to death, personal injury or severe physical or environmental damage.
Dec
13
comment Relay not switching immediately from switching power supply to battery backup
RadioShack doesn't explicitly disclaim fitness for life support purposes, so I guess you are good to go with the power supply.</sarcasm>
Dec
12
comment Is it bad to connect multiple electrolytic smoothing capacitors in parallel?
And finally (2) you can place each capacitor close to different loads, to reduce impedance due to track length. Of course this depends on physical layout. This is also done with small 100nF'ish decoupling caps near (logic) IC's.
Dec
7
comment Garbled serial on custom Arduino UNO
And what is the exact issue you are referring to? What do you expect to see, what do you consider wrong in the scope traces? Is your scope AC coupled by any chance?
Dec
7
reviewed Approve suggested edit on What are the effects if a star-winding three-phase transformer is used to supply three single-phase loads provided with neutral on both sides?
Dec
6
comment Is it possible to use arduino uno programmer for other microcontrollers from avr?
Not entirely clear what you are asking. Are you familiar with: arduino.cc/en/Tutorial/ArduinoISP
Dec
6
comment Is it possible to use Arduino UNO programmer for other AVR microcontrollers?
Not entirely clear what you are asking. Are you familiar with: arduino.cc/en/Tutorial/ArduinoISP
Dec
5
revised Why do all transistor latch circuits (that ive seen) use two transistors?
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Dec
5
comment Increasing the current to a solid-state relay?
@NathanOsman I'd start by moving the relay around. Switch at the LED's and coil at the Arduino side.
Dec
4
reviewed Approve suggested edit on Motor drivers and kickback diodes
Dec
4
comment Increasing the current to a solid-state relay?
Instead of a resistor, why not use a light bulb?
Dec
4
comment Light powered by rocking kinetic device
Although faint, I can make an LED flash by connecting it to a simple and cheap piezo transducer whilst tapping it. Maybe that is worth to investigate?
Dec
4
comment Noisy ADC readings
Why not try adding a capacitor on from +5V to GND and see what happens? Order magnitude 100nF, 1µF, 10µF. Adding a capacitor in parallel to the 12V is of little use if the output current is indeed somewhere near 5A, the required capacitor would be large and expensive, whereas the little once cost couple cents.
Dec
2
comment 8048 movp instruction
An example: You could use a lookup table for example to 'calculate' the square root of a number. If you have a given number '64' as input, you could load the 64th byte from the table and that would hold the number 8. You only need a single byte as input and the solution is a single byte as ouput. You pre-calculate the contents of the table and keep it in ROM.
Dec
2
comment 8048 movp instruction
page 38
Dec
2
comment 8048 movp instruction
page 79
Dec
2
comment 8048 movp instruction
Please add a link to the device's datasheet where you found this information.
Dec
2
revised 8048 movp instruction
added 4 characters in body
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