11

This solution only works if you have a separate bathtub in your bathroom. I'm pretty sure that all the water for your bathroom (shower, sink, toilet tank, bathtub) comes from the water heater to your bathroom in a single pipe. The pipe then branches off into multiple smaller pipes, leading to the various faucets / outlets. This should mean that if you get ...


6

Your solution can be as simple as two muffin tins in an appropriate size. As you fill each plastic sauce bottle, put it into the muffin tin. When the muffin tin is full, put another tin upside down over the top to hold the bottles in place. Pick up the whole thing and shake it a few times and all the containers' contents will be ready. You should be able to ...


5

I ended up using a power antenna from an old Volvo in the scrap yard. When it extends, the door opens, and when it retracts, the door closes. The antenna is powered by a 12V AC adapter, while the trigger wire is connected to a relay. The relay closes when power is sent to it from a WiFi smart plug, which means I can set schedules based on time and/or weather,...


3

A fair number of laboratories use toys like Fischer Technik or Lego in simple experimental setups. You could use them or similar, modular equipment to build a frame that connects 2 stirrers with an even number of same size gearwheels. (I'm certain I don't have to explain to you, but maybe some other users might not know immedieately) The even number of gears ...


3

Not exactly a hack, but if you can support the bearing, ideally on the inner race, and press on the shaft (an arbor press is probably enough leverage), the bearing will come off. These bearings are usually a press fit -- meaning the inside of the bearing is a tiny bit smaller than the shaft, so the bearing stretches a little going on. I fix power tools for ...


2

If the lights gone off - there's no one outside the stall. So open the door, wave your arm about and be enlightened.


2

I'll assume the light won't turn on again because the sensor can't spot your hands moving within the stall. The door and the stall walls block the sensor's "view". I can think of a few options: Try leaning back and waving your hands overhead, almost brushing the wall with your knuckles, and also moving your hands far to the left and right. That might ...


2

if you don't want to insert a stirring implement of some sort, you could spin the entire container, it'd just take a long time for the liquid to get up to speed. Measuring the speed of the stirrer is easy: stick a revcounter on it. These usually consist of an object stuck to the moving part of the stirrer, and a sensor that detects that object (a vane ...


2

There are people who build their own shakers and from the looks of it, all you need is a motor (or a tool like a drill), a wheel and an arm with a joint that translate the rotation into oscillation. Have a look at some Youtube videos of people who crafted a shaker from scratch: Simple wooden spray paint can mixer Model paint bottle shaker (I like this one ...


2

As you suggest, it is probably possible to rewire a standard current-sensing power strip so that the slave outlet is turned off when the master (microwave) outlet is drawing current. Most relays have single-pole-double-throw (SPDT) contacts, and switching the slave connection to the other side would work as desired. If you'd rather make your own switch, a ...


1

If you have to shake those bottle only once, do it manually. If you have to do that every day, then it is more convenient to build an "agitating" rig. Attach a platform to 4 wheels, eccentrically (like a cart, but with wheels not centered). The eccentricity doe not need to be big - maybe 2-3 cm should be enough. Secure the bottles on the platform ...


1

Even a large number of 40ml bottles will weigh less than a load of wet washing, and I presume the lid is very secure (I guess it must be to give you confidence to attach them to a sawzall) you could consider putting batches of them all in a tumble drier on cool cycle. Maybe put some towels in there too, to soften the blows on the drum and to catch any ...


1

Pack all the bottles securely in a box. Shake the box. Forty 40ml bottles will only weigh a few pounds, and unless these bottles need serious shaking, an automated rig seems like overkill - surely you can spend 1 minute every few days shaking a box of bottles? If you do need to shake them longer and your arms are getting tired, consider other means of ...


1

The sensors used have a range of x meters. One have to be in that range to interrupt the sensor which will in turn trigger the light/s. Best approach - look out for sensor and judge the range. If you are in the range zone, it should trigger the lights. Thank you.


1

I recently found out that many toilet motion sensors are based on a radar principle, and they use microwave radiation for that purpose. Thus, a very easy way to trick the motion sensor is to pick your mobile phone and start making a call. You don't have actually to make a call, just let it start making the connection as the microwave radiation will ...


1

Have a cat flap type arrangement and add a small latch that is released with a small 5V solenoid. Fit a over large 24V solar panel (with LDO voltage regulator) to release the solenoid catch at dawn (orient the panel wisely towards winter dawn) even if overcast. After the first hen is through the door you can have it stay open until roosting time when you ...


1

install a small roller door (pedestrian size) with remote controlled opener.


1

Build a door similar to this on the picture below; It is similar to the small doors for pets found on exterior house doors. I am not sure if the chickens will push the door with their heads to enter inside or go out. If this is the case, then you can put a sensor and a second stepper motor to open and close the door. Don't forget to wire the sensor also to ...


1

Since you do not worry that the chickens will be outside when you choose to have the door closed, as they are most likely inside already I have one suggestion to you: An automatic trap door. If you make a sliding door which can be hoisted upwards, then you can have an active lifting mechanism to lift it in the morning, and release it down again in the ...


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