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Recent content by gaga2410

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    Velleman K7200 or simular

    velleman psu k7200 Thanks Jacksr, I will try this and let you know ! :D I've used one 0.1ohm/25W because someone tell me it is ok, but it's not ok. :?
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    Velleman K7200 or simular

    pcb mk3965 Hi, I think my problem went to the current limit resistors R37 to R40. I've tried different value. With high value, the heating of R31 is less high. Does anyone know exactly the value for these resistors or have a formula to calculate ? Thank yo for all the help.
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    Velleman K7200 or simular

    uoguelph.antoon Hi everyone, I've made this PSU and use the PCB of Gevv. But I meet a problem when I start to calibrate the PSU. I follow the K7200 manual. I have connected an ammeter to the output, placed the potentiometers in the positions indicated. But when I turned RV1 for the maximum...
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    Benchtop power supply 0-30v 0-10a

    Hello, I've searched a design for a laboratory psu. I've found this psu by Tony Van Roon : **broken link removed** But it's rated for 115V. Is this suitable for 220V without major modifications ? Thank you for your help and suggestions.
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    Audio amplifier Philips FA660/00R

    philips fa 660 Hello, I think the trasnformer is tired. I will replace him. Bye.
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    PICStep project from fromorbit

    Hi everyone, I plan to built 3 picstep controller, the interface output board and the daughter input board. I have problem with part list for the interfaces board. There are no value for the TBA resistor. Are these special resistors ? Maybe TBA is a abbreviation ? I've attached schematic for...
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    What choice for stepper motor : unipolar or bipolar

    Thanks for this very helpful reply. But, can you explain to me what is torque please ?
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    A digital clock with leds

    Hello, Please help me to find this ! thanks a lot
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    What choice for stepper motor : unipolar or bipolar

    motor unipolar Hi, I'm wondering what configuration to choose for my cnc machine. I have 6 wires stepper motors wich can be use as unipolar or bipolar. What are the differences between this 2 modes ? What is the best choice ? Thank you for your advice.
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    A digital clock with leds

    Anyone can help by giving a link ? Thank you very very very much
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    A digital clock with leds

    A project like this, with or without microcontroller : **broken link removed** Have you other links for me ? than you very much !
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    A digital clock with leds

    Hello ! I've searched on the net for a project of a digital clock with 60 leds for the seconds and 7 segments for hour. I post a picture of the result I want to have. Does anyone can help to find this ? Thank you for help
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    Audio amplifier Philips FA660/00R

    philips fa660 Hello everyone, I need the service manual or schematics for a Philips power amplifier : FA660/00R. Thank you for your help ! Or, if you can help me to repair, i explain to you the problem : When I plug a small loudspeaker, it got in protection. Since I test the amplifier the...
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    Daewoo fr-521nt refrigerator

    Hello ! Does anyone have the schematics for this refrigerator or a service manual ? Thank you very much!
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    Capacitance meter with pic16f84

    Hello, You can find a complete design guide, dowload "cmeter.zip" on Tom McGahee url : **broken link removed** Bye
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