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  1. Erstwhile

    PS900 Oscilloscope Sweep Function Not Working

    Oh, you mentioned having an Arduino, that could be set up to provide pulses like a pulse generator, to put into the Trigger In.
  2. Erstwhile

    PS900 Oscilloscope Sweep Function Not Working

    I was thinking of setting up a 555 timer chip as an astable oscillator to input into the Trigger In jack to see if that would cause it to scan...
  3. Erstwhile

    PS900 Oscilloscope Sweep Function Not Working

    A cheap multimeter and then a "cheap" o-scope*. That is how I started out 40+ years ago! And look at me now! (an electronics hoarder) B^) I'll do some more thinking on this... *a Bell and Howell branded version of a Heathkit oscope I bought used for $80 I admit, your o-scope will probably...
  4. Erstwhile

    PS900 Oscilloscope Sweep Function Not Working

    What other test equipment do you have available? A signal generator? An audio generator? Pulse generator? Voltmeters? isolation transformer? For instance, a low level sawtooth wave from a signal generator put into the Ext. jack could/should make the dot on the screen become a line. That would...
  5. Erstwhile

    Help needed with portable car battery charger

    I've used the tang end of a 3 sided file to remove triangular socket head screws in the past... Now, I just use a head out of a 100 Piece Specialty Bit Set B^)
  6. Erstwhile

    For Sale: Various Test Equipment

    I believe; just as a carpenter can't have "too many" clamps, a Electronic Tech can't have "too many" PSUs or DVMs! B^)
  7. Erstwhile

    Another old guy joined

    Greetings, I joined yesterday. About a week ago I did a web search for information on repairing home weather stations. This site came up, I was surprised, I don't recall seeing it before. The information was useful. Anyway, it seems like a place where I'll fit in. (unless you have a problem...
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