Difference between revisions of "MicroBCU2"
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== Links == | == Links == | ||
| − | + | [https://knx-user-forum.de/forum/projektforen/konnekting/1550342-sehr-g%C3%BCnstige-micro-bcu-lite-als-bausatz-interesse Vorstellungs- / Entwicklunsthread im KNX User Forum] | |
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| + | [https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjZ_46X2aftAhUxvlkKHbOJCF4QFjAAegQIBBAC&url=https%3A%2F%2Fwww.onsemi.com%2Fpub%2FCollateral%2FNCN5120-D.PDF&usg=AOvVaw0KUimWgup68HXisop9pYTW OnSemi NCN5120 Datasheet] | ||
[[Category:Device/Kits]] | [[Category:Device/Kits]] | ||
Revision as of 11:57, 29 November 2020
| MicroBCU2 | |
|---|---|
| Developer | SirSydom |
| Status | beta |
| Version | V00.20 |
| Microcontroller/Board | universal |
Description
A Bus Coupler Unit (BCU) / KNX Transveiver which supplies the connected device with power from KNX Bus and provides a bus interface at OSI Layer 2.
Hardware
- IC: NCN5120 (ready for NCN5121 / 5130)
- Size: 23 x 19 x 9 mm
- Voltage 1: 3.3V
- Voltage 2 (optional): 5V (default), can be changed: 3.3V - 21V
- Max. current: up to 100mA
- UART: 19200bps 8E1 / 3.3V
User Documentation
Soldering the Kit
MicroBCU2 comes as a kit where the big parts on the bottom side have to be soldered:
- C4 - 100µF / 35V electrolytic capacitor. Polarization is important, refer to silkscreen or photo
- C41 - 1µF MLCC 1206
- L1 and L2 - 220µH inductors
- R1 - 22R resistor 2512
- J1 - 7x1 2.54 pin header (or whatever you need to connect to your host PCB)
- D1 - SS16 reverse polarity protection diode. . Polarization is important, refer to silkscreen. The bar on the diode should match the bar on silkscreen.
- D2 - SMAJ40CA TVS diode
I recommend to solder the parts in this order: L1, L2, C4, C41, R1, D1, D2, J1