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  1. bertus

    Handling high motor stall currents

    Hello, From the drivers page: Output current: 13 A continuous Active current limiting (chopping) with default threshold of 30 A (can be adjusted lower) https://www.pololu.com/product/2992 When needed there ia a stronger driver available: https://www.pololu.com/product/2995 Output current: 21 A...
  2. bertus

    Comedy Thread

    Thanks cmartinez AAC
  3. bertus

    Private Messages?

    Hello, When you click a username a pop-up will appear: Bertus
  4. bertus

    Question regarding using a plug adapter.

    Hello, Any supply voltage for the adapter between 110 and 240 Volts AC will work, so the 220 Volts in your area is no problem. Bertus
  5. bertus

    Question regarding using a plug adapter.

    Hello, Did you read the specs? Power AC Input Power 110 to 240 VAC, 50 / 60 Hz DC Input Power 48 VDC Power Source AC Adapter, External Battery Bertus
  6. bertus

    Strange Use For a Varistor ?

    Hello, Imagine what happens when the battery connections are shorted. Then the current would be 26 Volts / 12 Ohms = 2.17 Amp. The selfresettable fuse will peotect the power supply in that case. Bertus
  7. bertus

    help with Identification of Surface mount Transistor

    Hello, The 45 code is used for many components: https://smd.yooneed.one/code3435.html When you look at the list, you will see some diodes and voltage regulators. Bertus
  8. bertus

    Strange Use For a Varistor ?

    Hello, It is likely not a varistor, but a PPTC. it is the X040 PPTC, wich has a hold current of 0.4 Amp and a diameter of 7.6 mm. See the attached datasheet for more info. Bertus
  9. bertus

    Tek 2235 display problem

    Hello, I still have about 6 years to so before retiring. Wich contact cleaner do yo want to use? I usualy use Kontakt 60 from Kontakt Chemie: https://www.canford.co.uk/Products/55-101_KONTAKT-60-ELECTRICAL-CONTACT-CLEANER-200ml And for blasting away dust, I use the Kontakt 67...
  10. bertus

    Tek 2235 display problem

    Hello, What was the solution? Was it in the voltage divider of the focus? As for the TEK 7514, I could find this page with a user manual: https://w140.com/tekwiki/wiki/7514 Bertus
  11. bertus

    Trouble understanding a V+ description on a motor driver

    Hello, When you look at the back, the V+ connections are all in the same plane: Bertus
  12. bertus

    Microwave detection circuit verification

    Hello, Toroid coils are usualy for low frequencies upto 100 MHz, depending on the type of core: https://www.electronics-tutorials.com/basics/toroids.htm FM radio is 88 to108 MHz. Phone frequencies are in the range of 800 to 2000 MHz and many more for 5G...
  13. bertus

    Simple battery charger

    Hello, Did you have a look at the thread on AAC that wendy gave you? SLA Battery Charger There are some good ideas from SgtWookie in there. Bertus
  14. bertus

    Simple battery charger

    Hello, And if the voltage is 14.4 Volts, as Harald recommended, the current through the led will be (14.4 - 12.6) Volts / 15 Ohms = 120 mA, wich will likely burn the led. You would get a better indication of the battery status when you move D2 to point 1 of the output connector. In the...
  15. bertus

    Crazy connector

    Hello, It looks like an 2 pin din connector for speaker connection: http://thehifihospital.com/custom-cables-made-to-order/2-pin-din-vintage-speaker-connector/ Yours has hooks to fix it to de device. Bertus
  16. bertus

    Tek 2235 display problem

    Hello, Perhaps a weird question, but what happens when you press the beamfinder button, next to the display? That should show a small picture where the beam is. Bertus
  17. bertus

    NI DAQ taking Teensy or STM32 as input

    Hello, The cDAQ9171 seems to be an interface for one card: It will need an USB port to communicate. Bertus
  18. bertus

    Tek 2235 display problem

    Hello, This thread in the archive is talking about the resistors in the focus line that go off value: https://www.electronicspoint.com/forums/threads/focus-adjustment-on-a-tek-2235-cro.65062/ Bertus
  19. bertus

    Tek 2235 display problem

    Hello, Here I have the datasheet of the MC10198. Bertus
  20. bertus

    Tek 2235 display problem

    Hello, In post #8 you mentioned: Is the transistor itself working? Could you pull the transistor and test it with a DMM, to see if there is no short between collector amd emitter...
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