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TonK5

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  • Make It Glow: a Flash Upgrade to Ultraviolet

    Of course, thank you for highlighting this. I have mentioned this since it may widen up the application of the flash.Infra red is not a problem on most digital camera's, handy thing to know since this allows you to test a remote control for your tv set and others.... just look through the camera at the Infra red LED and press a button on the remote...

    Note that digital camera's often have a UV blocking filter in front of the sensor, reducing the sensitivity for UV. This filter can be taken out but clearly, this is more labor intensive and you risk ruining your camera.

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  • Fix Up an Old Laptop!

    take the disk out and connect it to another computer using a disk to USB convertor. note, some laptops use disk with a non standard electrical connection, in which case you have to have a second PC with identical connector and start the PC with a stand alone Linux from a cd or a USB. (it will not likely start from your OS on the HD...)

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  • The Unpluginator - Self-Unplugging Useless Box

    Perhaps adding another power chassis socket on top of the first, but pointing to the other side of the box? Ensure that the motor will turn in the opposite direction and you may keep on plugging it......

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  • How to Make a Softstarter

    This is also usefull for mains applications, I owned a 240V transformer based stick welder which always blew an electronic main cct breaker at power up due to an excessive run in current. Old style melting fuse was not affected since they are "slow blow"Only a few modifications are needed: forst and foremost, it needs a plastic housing! also you may want to use a 100 W / 10 Ohm load resistor (with additional cooling, just mount it/them on a metal plate inside the housing). Also, use a timing capacitor that provides about 1.5 seconds delay. (100 Watt is OK since the resistor just needs to reduce the initial peak, after which the current will drop to the idle current) hwich should be about 2-3 Amp. Start welding after the relay has shorted the resistor out....you may add a green L…

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    This is also usefull for mains applications, I owned a 240V transformer based stick welder which always blew an electronic main cct breaker at power up due to an excessive run in current. Old style melting fuse was not affected since they are "slow blow"Only a few modifications are needed: forst and foremost, it needs a plastic housing! also you may want to use a 100 W / 10 Ohm load resistor (with additional cooling, just mount it/them on a metal plate inside the housing). Also, use a timing capacitor that provides about 1.5 seconds delay. (100 Watt is OK since the resistor just needs to reduce the initial peak, after which the current will drop to the idle current) hwich should be about 2-3 Amp. Start welding after the relay has shorted the resistor out....you may add a green LED in parallel with the coil with a suitable series resistor (820 Ohm will give you about 12 mA current through the LED) as an indicator.Important: all circuitry needs to be double isolated and therefore be build inside a plastic housing including the now required additional 12V power supply A simple mains plug type adapter mounted inside the box (with i.e. velcron) would work just fine. Use all nylon screws for mounting the PCB etc to prevent a loose wire providing a live voltage to anywhere on the outside of the housing. Furthermore, use double isolated material for i.e. the main power switch on the front of the housing. note this switch replaces the power switch on the welder which now should be "always on" . Also, make abolutely sure the construction is in line with the applicable code for electrical apparatus in your country. The relay needs to be suitable for your mains application. Often, an old style car Main light relay 25...40 Amp would do nicely since its contacts typically open wide enough for a mains application and the coil and its connections are generally well isolated from the (Live!) switching contact(s). (>= 6 MM is the norm here). Since a power plug type power supply is used and all is inside the insolated housing, it is not extremely important, just an added safety measure...Check your own national situation when in doubt or use a relay which has been designed for such application (12 V coil/ 240V AC / 25 Amp contacts). Disclaimer: Since the practical construction is beyond my control, following these suggestions will be solely at your own risk!When done right it will be a very usefull box in particular if the cct breakers are like 50 M away from your workshop (and also protect the TV set.)....

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  • TonK5 commented on LumberBear's instructable Reclaimed Wood Vent Hood

    I could not help noticing that the outlet of the vent seems right underneath a ventilation mesh of sorts. This is the next possible desaster if true. if a pot catches fire, your fan will throw flames and heat straigt out of the piping and possibly right in to the mesh above. a proper way of doing this is to extend the piping and ensure that the outlet is far away from any combustionable materials.

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  • It can also be done by hand, 1"- 25.4 mm. so 50 mm makes 1" rest 24.6mm .4 mm = about 1/64" so the rest is 63/64" If you understand Imperial than this should be a relative simple calculation, that is for most projects like the one we are looking at. for accurate projects like machinery this is of course another matter.

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  • TonK5 commented on fretters's instructable Computer Drawer

    Correct and such screening actually works 2 ways..Other than that a traditional radio or TV set will suffer from interference, this computer may be prone to problems when a faulty (defect mains spark filter) vacuum cleaner is used nearby.At the very least conductive grounded metallic shielding should be used, and in praktise also the corners/edges will have to be EMI closed. (Wind tight we call that, translated from Dutch) Glad this isn't at my neighbour's house to be honest, although it looks fantastic!

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  • There is one exception and that is when a static charge i.e from your hand gets transferred to the chip contacts, this may cause malfunction of the chip. So, putting a large metal object next to the chip without isolation may not be such a good idea.if i remeber right, my bank told me not to touch the contacts....

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      • Fix Up an Old Laptop!
  • Very good initiative to put this on line... Done a few of these my self but never came to post the process. Actually, I have an addition for people which have a defect unit and are not afraid to tinker a little more... many laptops, PC's and amplifiers have cooling problems due to the thermal paste aging. One often does have to take the motherboard out of the laptop casing and take the heat pipe system off the main chips to fix this. Also worth checking the fan and the "radiator" whilst you are at it, since they eat a lot of dust over the years. If the fan does not run smooth you can clean it and re-lubricate. cheack the youtube eco system for detailed information.Take all the (white) cooling paste off the heat pipe and or heat sink's as well as the (sometimes used) thick therma…

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    Very good initiative to put this on line... Done a few of these my self but never came to post the process. Actually, I have an addition for people which have a defect unit and are not afraid to tinker a little more... many laptops, PC's and amplifiers have cooling problems due to the thermal paste aging. One often does have to take the motherboard out of the laptop casing and take the heat pipe system off the main chips to fix this. Also worth checking the fan and the "radiator" whilst you are at it, since they eat a lot of dust over the years. If the fan does not run smooth you can clean it and re-lubricate. cheack the youtube eco system for detailed information.Take all the (white) cooling paste off the heat pipe and or heat sink's as well as the (sometimes used) thick thermal tape. Check the thickness of the tape before you take that completely off with a caliper and replace it with new similar tape or a suitable copper filling plate of the same thickness as an alternative.. Also put new thermal paste on all the heatsink and chip surfaces as well as on hte copper filling plate (if used). Not to much though in particular if you opt for Silver based stuff since this may be conductive and spills may short contacts out.... Also use gloves since these thermal paste varieties are understood to have health implications. Some laptops like and old 17" Sony I own need a reset of the CMOS/BIOS (Jumper) after the video chip has been triggering an high-temperature situation. A lot of laptops have thermal problems when they age and the above procedure will get them usually going again.Happy tinkering!

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  • Good work, tip, in case you need a dummy load to test a high power amplifier without the ambition to upset the neighbours, you may try modifying a hot air heater which is often found cheaply at a charity shop. Use screwable connectors and make sections of 4Ohm, 8Ohm etc. by cutting the heater wire and using screw clamps. Added bonus, it comes with a fan to cool the heater wires down since they will get hot when testing i.e. 100 Watt amps. for that you just have to use the existing fan and mains wiring and switch. I suggest to extra isolate the mains portion (hot melt and plastic) to avoid the amplifier load portion to make contact with the mains i.e. when the loadbox accidentally drops...

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  • TonK5 commented on Vyger's instructable Free Air Conditioning

    Excellent project. I have some suggestions: 1. You may want to spray paint the heat exchange black to increase the efficiency (if remembered well, by some 15%). 2 : rather than using towels you also may collect the condensation in a container and pump it out when a certain water level has been reached. Scrapped Condensation laundry dryers (i.e. Miele) of various makes could be the source of the required parts.

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