I had ordered months ago a XY-MD02 Temperature and Humidity Transmitter Detection Sensor Module Modbus SHT40 Temperature Sensor from some Chinese source (it is available from many on-line shops). Now I had finally some time to test it. Parameters: Product name: temperature and humidity transmitter DC power supply: DC 5V-30V Output signal: RS485 signal Temperature →
You don’t need to always have USB C to be able to plug the connector both ways. Here is an USB A – microUSB cable where both ends plug in both ways. Some kind of USB C wannabe? Here you see a design for a USB-A connector that’s fully reversible. It uses a very thin →
Here is a look at old KEMO M087 LED tester module (the original M087 is discontinued product but there is a newer different looking M087M product. With the aid of this test module it is made possible to carry out tests with all kinds of light emitting diodes in order to check function, brightness, colour →
This picture from Supertietokone, joka toimi myös sohvana article shows the classic Cray supercomputer from the 1970s and 1980s, which was specially designed – as Cray computers have always been. It does not a traditional computer, but as a strange seat. And you can really sit on one of those if you get access to →
Encrypting your hard drive is good security. If you’re running Windows, the most popular system is BitLocker. But how secure it it? Bitlocker runs silently in the background, decrypting data on demand. In a simplified sense, encryption keys are stored in the Trusted Platform Module (TPM). Longer description: The data is encrypted using the Full →
Inductive cooker powers a LED wirelessly. The kettle needs to be here to keep the inductive stove to be turned on (it will turn off when no big metal object is detected on heating area). This LED circuit worked for me for a short test, but there is no guarantee that it will work for →
Here is one experiment to power two LEDs using Qi standard smart phone charger. The two LEDs are wired to opposite directions in parallel to the output wires of 0.17 mH coil. The coil has around 80 turns (5 layers and about 16 turns each) Here is LED active I actually built two circuits with →
Here is one experiment to power two LEDs using Oral B toothbrush charger. The two LEDs are wired to opposite directions in parallel to the output wires of 0.17 mH coil. This circuit can be used as an interesting novelty circuit drive a LED wirelessly from a toothbrush charger. In addition to that the circuit →
Wireless charging for toothbrushes offers a convenient and cable-free solution. Wireless charging eliminates the need for physical connectors or USB cables. Toothbrushes are commonly used in wet environments (bathrooms), and wireless charging systems for toothbrushes can be designed to be water-resistant. It’s a well-known fact that electronics and water do not go together. Most electric →