Anyone tried these? They seem to be all over Aliexpress now.
@ Epyon
buying 2 pieces is interesting, free shipping to the Netherlands.
There’s a new 3dB 868 antenna from the same seller, just came out for sale today. Looks interesting. $36.99 with free shipping
@BoRRoZ That’s interesting! The only thing I wonder is why that length? You can make a collinear array with the same gain and much smaller dimensions (e.g. the Sunhans one).
the 10 dbi is 90 cm compared to the 14 dbi that is 150 cm
- update - first impression = ok
10 dbi (90 cm) and 3 dbi (40 cm)
Interesting antenna. I dont’t know yet what performence it has: http://shop.top-electronics.eu/onboard-antenna-smd-868915-mhz-p-17150.html
Price: € 1,45
Datasheet: http://www.proant.se/files/user/Datasheet%20-%20OnBoard%20SMD%20868-915%20MHz%20rev%202.0.pdf
It’s very good
Storage box with 250 SMD Tactile Push Button Touch Switches 10 different types: $6.08 delivered
DC / DC converters eBay
boost 5V + lipo charger :
- http://www.ebay.com/itm/5V-UPS-Power-Diy-Board-Charger-Step-up-DC-DC-Converter-Module-3-7V-Li-ion-LiPo/282352753274?
- http://www.ebay.com/itm/Lithium-battery-charging-charge-5V-step-up-protection-all-in-one-PCB-board/111986212585?
- http://www.ebay.com/itm/PCB-Li-ion-Lipo-Battery-3-7V-step-up-Convert-to-Output-1A-1000mA-Power-DC-5V/130918041193?
- http://www.ebay.com/itm/3-7V-Lithium-ion-battery-charge-5V-1-5A-USB-out-all-in-one-PCB-charge-iPhone-/121017503840?
boost 5V :
- http://www.ebay.com/itm/4PCS-2V-5V-to-5V-2A-Stable-DC-DC-Step-Up-Boost-Power-Supply-Fixed-Output-/391453383027?
- http://www.ebay.com/itm/OE-DC-DC-Boost-Converter-Step-Up-Module-1-5V-to-5V-500mA-Power-Module-New/321829513849?
buck/boost 3v3 :
- http://www.ebay.com/itm/2in1-Buck-Boost-0-8-6V-to-3-3V-DC-DC-Converter-Module-for-esp8266-Wifi-Bluetooth-/272426902863?
- http://www.ebay.com/itm/DC-DC-Converter-1-8V-3V-3-7V-5V-to-3-3V-Boost-Buck-Step-Regulated-Charge-Pump-/172525286599?
battery shops
bigger then ‘normal’ coincells !
DIY charger - replace R4 with 33K