Understanding Relay Coil Voltage Specifications

---

https://www.electronics-lab.com/understanding-relay-coil-voltage-specifications/

by Robert_Fay @ digikey.com: When learning about relays there are a couple coil voltage specifications that can be a little tricky to understand. There are typically 4 specification for coil voltage listed in the datasheet. For this example we will be looking at relay part Z2352-ND 14. This is a SPST non-latching relay with 1 […]

USB powered – PCB TeslaCoil

---

https://www.electronics-lab.com/usb-powered-pcb-teslacoil/

Daniel Eindhoven build a usb powered Teslacoil able to produce small sparks. The coil of the device is printed on the board! A new and improved PCB spiral Teslacoil. This Teslacoil has etched windings on a print circuit board. It has a USB interface which also powers the coil. The resonance frequency is about 4MHz. […]

Contactless payment ring – A tutorial on NFC antenna coil design

---

https://www.electronics-lab.com/contactless-payment-ring-a-tutorial-on-nfc-antenna-coil-design/

Jatinder has tipped us with this latest post. He writes:  I have a done a video about a contactless payment (NFC) ring that I have made. The video talks about NFC antenna coil design and how I used the concepts to make the wearable ring. Contactless payment ring – A tutorial on NFC antenna coil […]