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  1. bertus

    Voltage for small power supply

    Hello, What kind of PC do you want to power? A laptop uses a "brick" power supply. A PC uses an ATX power supply. Bertus
  2. bertus

    Amps of a car battery

    Hello, Read the PDF in the link , it states this: A “shorted” lead acid battery has the capability of delivering an extremely high current, 100 to 1000 times the typical discharge current used in most applications. Electrical systems using batteries must be properly protected to avoid...
  3. bertus

    Thermal resistance

    Hello, Here is an article on heasinks, that will also explain thermal resistance: https://sound-au.com/heatsinks.htm Bertus
  4. bertus

    datasheet and information about 6c17504 and 1d17409 8pin ic

    Hello, I found this : PWM Power: FA8A01 https://masterelectronicsrepair.blogspot.com/2020/04/repair-servicing-tv-aiwa-40le7120s.html And this: https://www.alldatasheet.com/datasheet-pdf/pdf/422941/FUJI/FA5612.html Bertus
  5. bertus

    datasheet and information about 6c17504 and 1d17409 8pin ic

    Hello, Perhaps they know more at the badcaps forum: https://www.badcaps.net/forum/index.php? They have a special section for video sources: Troubleshooting TVs and Video Sources Technical questions about your defective television, projection screen, LCD/plasma...
  6. bertus

    NiMH Battery, NiCad Charger

    Hello, No, you can not use a NiCad charger for NiMH. Have a look at the following pages for the differences: https://batteryuniversity.com/learn/article/nickel_based_batteries https://batteryuniversity.com/learn/article/charging_nickel_based_batteries...
  7. bertus

    Battery usage time calculation.

    Hello, A lot more info can be found here: https://batteryuniversity.com/learn/article/discharge_methods https://batteryuniversity.com/index.php/learn/article/what_is_the_c_rate https://batteryuniversity.com/index.php/learn/article/bu_503_how_to_calculate_battery_runtime Bertus
  8. bertus

    Battery usage time calculation.

    Hello, The calculated 0.94 hours is theoretical. It would be closer to 0.47 hours in practice. Have a look at this page: https://www.powerstream.com/battery-run-time-calculator.htm Bertus
  9. bertus

    Connecting transistor to battery terminal

    Hello, You are not completely correct about the capacitor. Electrolitic and tantalium capacitors do have a polarity. When mounted in reverse, they can blow up. As for transistors, it depends on wich you are using. In NPN transistors, the collector should have a higher potential as the emittor...
  10. bertus

    Right Half Plane Zero ... SMPS

    Hello, Read this: https://www.ti.com/seclit/ml/slup084/slup084.pdf Bertus
  11. bertus

    Thoughts on this transistor?

    Hello, Just compare the datasheets. Bertus
  12. bertus

    Looking for STM32F103C8T6 guidance

    Hello, Are you related to Ed Shuffle ? You have the same IP as Ed. He posted also a post : STM32F Question Bertus
  13. bertus

    STM32F Question

    Hello, That question would be more suitable for the AAC forum. It has a special section for microcontrollers: https://forum.allaboutcircuits.com/forums/microcontrollers.17/ Bertus
  14. bertus

    Best Place to Purchase.

    Hello, Also farnell (eu) or newark (us) are good sources for parts. Bertus
  15. bertus

    Question: 1n5408 or 1N4007?

    Hello, Depends on the current needed. The 1N4007 is good for 1 Amp. The 1N5408 is good for 3 Amp. Bertus
  16. bertus

    datasheet and information about 6c17504 and 1d17409 8pin ic

    Hello, This is the third forum you are asking. It can well be that the chips are OEM products. The numbers will be inhouse coded and can not be found on the internet. Bertus
  17. bertus

    Resistor Heating too Fast

    Hello, What is the circuit where this resistor is used? When it heats up very quickly, the power is way to much for the resistor. Bertus
  18. bertus

    Power Supply for LEDs

    Hello, Can you post some pictures of the front and back of the PCB? That way we can see how the led are arranged. Bertus
  19. bertus

    Switching Higher Current -- MOSFET

    Hello, Protect the Vgs with a zener. Why do you want to have a high Vgs? Bertus
  20. bertus

    Redesigning My Broken PSU

    Hello, An other way of getting more current is the use of a pass transistor. The following pictures shows the use on the 78XX and LM317: Bertus
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