Repair of a WMF Kult milk frother

The WMF Kult milk frother is a manually operated device that rotates the whisk via an up and down movement and thereby froths the milk. The principle of operation is similar to that of a humming top. In the hand grill there is a sleeve around which helical grooves wind on the inside, like a …

Cardanically suspended and fourfold ball bearing beverage holder

Suspension of a vessel holder from a rack by means of two intersecting perpendicular pivot bearings. Sturdy construction made of weather- and sea-resistant plastic with stainless steel screw connections. Two bearing points per ring for the highest possible stability. Thereby high degrees of freedom in the swing-out movement. Suitable for standard 330 ml or 500 …

Clamping claw for micro milling machine

Inspired by a no longer needed ITEM system profile I had the idea to build a small miniature milling machine from old parts. I will report about this separately. I used the small, but for my purposes perfectly adequate Proxxon KT 70 as a cross table. To fix the workpiece, I designed and 3D printed …

160 W laboratory power supply

I wanted to have as compact, small and flexible a laboratory power supply as possible with a maximum output voltage of 32 V and 5 A. It was especially important to me that it should be completely passively cooled. So I can use it overnight to charge different batteries without being disturbed by the noise …

Laboratory power supply for monitored USB power feed

Power supply via USB is practically an industry standard for many devices nowadays. Originally only intended to supply power to small devices such as computer mouse or keyboard, the USB connection is now operated without a data line practically as a universal 5 V socket. Here, the intended limit ranges for voltage and current are …

One 18650 battery instead of eight AA batteries for rc control

The manufacturer has provided eight AA batteries with a cell voltage of 1.5 V for the RC model remote control. These are connected in series to achieve a final voltage of 12 V. Having eight batteries or rechargeable batteries always in stock was too much and too expensive for me.Instead, I redesigned the battery compartment …

Simple spacers for balcony flower boxes

3D printing is the perfect tool to fix little things in everyday life that are always annoying but too time-consuming to fix with other methods. The new brackets to attach flower boxes to the railing of our balcony are (like most things purchased) poorly thought out. I have simply constructed spacers that can be clipped …

Universal battery charging slot

Universal battery charging slot for all available types of battery round cells.Any primary or secondary cell can be permanently clamped and connected to a measuring instrument, laboratory power supply or electronic load. The current collectors are pressed firmly onto the battery terminals via the spring, which provides a reliable and reproducible result. This device is …

Walkie-talkie modified into a baby monitor

Commercially available baby monitors are ridiculously overpriced, usually only allow one-way communication and cannot be used for any other application. Once the child has outgrown the device, it is useless. In addition, the radio range of the devices is usually very limited.An alternative would have been smartphone apps or the baby monitor function of our …

Improvements of my sand polisher

Introduction After prolonged operation of my sand polisher, the problem of the glass jumping off the guide gears due to the axially opposing force occurred again and again. As a result, the gear ring is no longer in the groove and the drive gear slips. Prolonged and unattended operation is thus excluded. To solve this …