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    switch mechanism

    $50.00 4 channel rc transmitter and receiver. $7.00 servo with a pin connected to the servo arm one end and through a support bracket the other. When ready to release the line, operate the servo, pin pulls out of support bracket and releases the line, simple. If you want to go with a commercial...
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    Any expert in radio-controlling drones ?

    Perhaps just watch the video. If you have a need to go with yagi antenna, these next videos may be of some assistance. May not be the frequency you stated but hey, can't have everything..........
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    Security camera problem

    Easier flying to the moon than get any help from China. To begin with there is still the dreaded Chinglish .....:rolleyes: Guess I'l just forget it and bin them, not worth the effort. Yes, well it does on my "supposed" PAL tv ( as in my first post pic) but on the lcd monitor used for FPV and...
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    Any expert in radio-controlling drones ?

    You will get much better range using helical coil antenna.
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    Any expert in radio-controlling drones ?

    More than likely experience a much shorter range if ground based especially if any obstacles in between Tx and Rx.
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    Any expert in radio-controlling drones ?

    Can you see this drone clearly at 1 mile, I couldn't and I have close to 2020 vision. (1 issue of many) As it is a a fairly controversial issue at the moment ( and bound to become more-so) it might be a good idea to remind you of the laws in many countries that include "must be controlled in...
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    Security camera problem

    Tried connecting the video signal into a small lcd monitor I use here for FPV but still nothing. LCD monitor has auto sw over between PAL and NTSC apparently. https://www.banggood.com/FPV-4_3-Inch-TFT-LCD-Monitor-Screen-For-RC-Models-p-940817.html?rmmds=myorder&cur_warehouse=CN
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    Piezo speaker amplifier?

    More than likely some form of audio transformer normally used for impedance matching. Just what values would depend on the rest of the circuit.
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    Security camera problem

    Have a couple of new security cameras I bought off Ebay (only cheapies) thought I might be able to use on my existing system. However, the output, although bnc connector, and I assumed would be analog and ok, comes up with oblique lines. Assuming something to do with different output type than...
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    Create controlled 50v pulse

    Might be a question better directed to the Picaxe forum. Also, I'd imagine one bottleneck may be the way you write the program.
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    Question on reversing polarity for DC Motors

    Surely that would depend on the timer used. Interlocking the drive relays would ensure no 2 could be on together. Forward Reverse sometimes requires a careful eye on contact racing also.
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    panasonic home theater system won't turn on

    You may more than likely find a solid state fuse. I have seen this in Panasonic power supplies before. Appearance is like a small rectangular capacitor. Board marking will identify it as a fuse. Like this but of course may be any colour(mostly grey)...
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    Wanted: 2sk1058 mosfet

    https://www.ebay.com.au/itm/10pair-20pcs-of-2SJ162-2SK1058/271454415078?hash=item3f33f1a8e6:g:DUAAAOxy3zNSl0KI:rk:19:pf:0
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    What did we do before LEDs

    Some people just take postings too literally I think..........:D
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    How can I connect this microphone and recorder to AA-batteries?

    Yes, I saw that after I posted.......... usual thing , foot in mouth...:rolleyes:
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    Markings on analog moving coil meters...

    Ohms per volt is the meter impedance as seen by the test circuitry. Other markings usually scale size and probably model numbers or manufacturer details.
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    How can I connect this microphone and recorder to AA-batteries?

    Vcc is positive of power supply in and Gnd is the negative. Looks like "record in" will be REC and GND. No idea what the rest does. Did they provide any data sheet? If not and the above info is not enough, you may have to Google or Youtube for anything else. If using AA batteries, I'd tend to...
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    Car Reverse Camera - Noise / No Picture

    Wireless one might be an option. Add-on available for existing units.
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    Understanding, Optimization/Realization of the voltage controlled current source.

    Don't think it will withstand 48v either (unless that is a drawing error....+24v , -24v)
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    Can I pour 99% isopropyl alcohol onto my light socket contacts? Safe?

    Just note that this has now been replaced by the correct "flammable".
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