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;
2h
comment Unplugging a router from the wall socket
Amongst other things, it has to do with the central end router (DSLAM) that requires a timeout to release the connection. Only then it will set up a new and fresh connection, forgetting previous state.
3h
comment arduino boot loader problem
@Gerben why would I download a 52kB image for under 100 bytes of text? It is less effort to copy the text in the first place and not a single search engine will be able to index the question properly, rendering the question useless for future visitors.
13h
comment arduino boot loader problem
How about removing the screendump from the question and pasting the text from the screen in your question so we can actually read it?
2d
comment CPU heat-sinks for cooling Transistor?
It would help if your transistor was in the same package as the CPU the heatsink was designed for, which is pretty unlikely. Sure it can work, but the combination will not be rated for mentioned 100W.
Jul
26
comment Difference between capacitors of same value but different sizes
Age. Similarly rated caps are much smaller now than they were 20 years ago. Probably caused by other reasons listed here.
Jul
25
comment Arduino gets stuck: battery powered, wireless, dc motor drive
@DuncanC when done correctly that is a perfect method to identify the cause of the problem, I do not think using two power sources all the time can be considered a good solution.
Jul
25
reviewed Reopen LED driver circuit help needed
Jul
25
reviewed Approve suggested edit on Help to design an amplifier
Jul
25
comment How power system is designed for extreme small system, such as google contact lens?
There is salt water in the eye, I bet you could use copper and zinc electrodes.</kidding>
Jul
25
comment Arduino Mega - get mac adress
I guess the more the Ethernet interface can offload workload from the microcontroller, the more tasks are done on the Ethernet interface. If you have a Ethernet interface without hard wired MAC, then your microcontroller will be much busier with communications than an interface with hard wired MAC (and related 'accelerating' hardware).
Jul
25
comment Arduino Mega - get mac adress
@ChrisStratton With a regular NIC (network interface card) as the one in your computer, tv, phone, ... the MAC address is always hard wired. This obviously is not a complete NIC, just some sort of bare bone.
Jul
25
comment Arduino Mega - get mac adress
@ChrisStratton according the the other answer some shields come without a hard wired MAC address. When inventing your own address it is essential to make it unique on your network.
Jul
25
revised Arduino Mega - get mac adress
added 17 characters in body
Jul
25
comment Arduino Mega - get mac adress
No MAC address is hard wired, IP address is configured in software @ChrisStratton Arduino doesn't have a MAC address, the Ethernet NIC does. Arduino can probably overrule the hard wired address, but that is advanced use of the shield.
Jul
25
comment Strange output waveform of the high-side load of MOSFET
OK you found the cause, you just need a good solution that will last and won't stress the components unnecessarily.
Jul
25
revised Arduino Mega - get mac adress
added 7 characters in body
Jul
25
answered Arduino Mega - get mac adress
Jul
25
comment Arduino gets stuck: battery powered, wireless, dc motor drive
@DuncanC to be honest, that was more or less the reaction I was hoping for. Check these related questions on EE:electronics.stackexchange.com/questions/105820/… and electronics.stackexchange.com/questions/59325/… and electronics.stackexchange.com/questions/90971/… The problem is clearly related to power surges and caps may be able to solve that. BTW OP should really post a circuit diagram, because details unclear.
Jul
25
comment Strange output waveform of the high-side load of MOSFET
Probably the laser diode's internal driver circuit. What happens if you connect a small cap in parallel to the laser diode? Small enough to not excessively load the MOSFET and as a temporary experiment only. You might get a way by decoupling the power supply near the MOSFET/laser combination. What is the order magnitude of MOSFET impedance R(DS)? Is the gate voltage driven high enough?
Jul
25
comment What purpose does the capacitor serve in this schematic?
The type of bouncing where this configuration works, is not a digital controller output like the your diagram implies. It is more intended for a push button. If it is used to delay the latch pulse, then remove the cap and fix that delay in software.
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