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  1. dorke

    Need Help finding inductance in a RL circuit

    from XL1=2*pi*f*L1 L1=XL1/[2*pi*f]=1414/[6.28*80000]=0.002815H
  2. dorke

    DC short circuit calculation formula for copper busbar

    Harald, I'M sorry to say this but : This guy sounds like a TROLL if I have ever seen one! Just ignore him...38000A yes sure...:mad:
  3. dorke

    Need Help finding inductance in a RL circuit

    The direction is fine, but some numeric corrections: (XL1)^2 =[1500*1.428571429]^2 - (1610)^2 (XL1)^2 =(2143)^2- (1610)^2
  4. dorke

    4 bit BCD to 7 segment decoder circuit

    I think you will like this video it will help you a lot. at the start ,and then don't miss at 11:35 on I wish I had this kind of help when I started...;)
  5. dorke

    Can someone help me - Cable trouble.

    A damaged cable can have various forms: Snape, cut, rubbed, corroded terminals etc. It would be better if you can post a good photo from several angles and sides for inspection.
  6. dorke

    4 bit BCD to 7 segment decoder circuit

    This may help you: De-Morgan's laws
  7. dorke

    Building AEON overdrive pedal from mammoth electronics, need help...

    The Ic can be purchased here (10PCS at 1$) Your work needs improvement, wires are stripped too much (see the pic below for examples). Very important: swap the pots connections-they are not as shown in the instructions. I would re-check the switch wiring as well.
  8. dorke

    Need Help finding inductance in a RL circuit

    Yes Chris you have got the bonus, well done!:) Note that if the inductor would have been on the "vertical arm" , it would have been a "Lead-circuit". In terms of Filters we talk about phase-shift.
  9. dorke

    Need Help finding inductance in a RL circuit

    Nop, Here is the hint for you,the only information available to solve this...
  10. dorke

    Need Help finding inductance in a RL circuit

    1. I didn't wont to totally solve this for you so I wrote: "Use Vin/Vout=R2/[R2+(R1+XL1)] to calculate XL1". Since that doesn't help(You should have noticed you can't simply add r+X,that should be a vector addition) Let's re-write it Vin/Vout=R2/[(R1+R2)+jXL1]=R2/Z were Z= [(R1+R2)^2...
  11. dorke

    Building AEON overdrive pedal from mammoth electronics, need help...

    1. The 2 legs LED goes like this: Long leg(anode) connected to #2 the other leg(short) connected to #3. 2. There should be 3 jacks in the kit: -two for audio (in and out ). -one for power (or maybe there is a 9v battery connection) . The 9v should be connected to it(and GND as well). Please...
  12. dorke

    Need Help finding inductance in a RL circuit

    Chris, You haven't revealed all the information in the question. Note that: the resistance between 1-2 is 1.61K ohms and between 1-3 is 1.5K Assuming this is a 1st order R-L filter. The circuit is this: From the scope trace you found that Vi/Vout=0.7 and f=80khz. Use Vin/Vout=R2/[R2+(R1+XL1)]...
  13. dorke

    I am looking for 2 thermostat switch of ELTH 261/BP 16A 180C AND 160C degree

    What appliance does it belong to? Microwave oven,Coffee machine... If you need the parts for repair. The best way would be to inquire at a local "dedicated parts shop" and buy it from them. If you need it in quantity you can try to contact CEBI (former ELTH)...warning :they have a miserable...
  14. dorke

    Alternative for 8 2N3904 transistors in a single chip?

    Most likely not as bright.
  15. dorke

    Alternative for 8 2N3904 transistors in a single chip?

    Your best choice would be... eliminate all transistors . You may need a slight code modification Use a 2ma 7 segment element instead of the 20ma you are using now,that simple.;)
  16. dorke

    Help optimizing byte compare algorithm

    Fun ha? Hop,you are probably the only one here that still remembers what "inline parameter passing" was... If you do need it :hint PDP11 assembly. That was Fun,wasn't it...:confused:
  17. dorke

    Help optimizing byte compare algorithm

    Hi Hop, What is the Higher-Level language people use for PIC ? C other? EDIT: I found this Flowcode tool,looks very interesting. Is anyone familiar with it?
  18. dorke

    Building charger cable help

    can you please post a photo or owners manual or make and model number?
  19. dorke

    Building AEON overdrive pedal from mammoth electronics, need help...

    No need for the 'mod". GND wires are shown in grey. Basically you connect the 3 jacks:In,out,power. (the power polarity should match the wall-wart PS you use, if there is marking on the box go by it) Is there a battery housing? See this example:inner is GND ,outer is +9V
  20. dorke

    How do I repair my monitor?

    You can download a service manual here. Start by checking the presence of +19V and +5V at connectors CN801 and CN802 on the PS board. Caution:there is High Voltage on the board as well!
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