DIY PCB with flat VIA’s

Catching up the development of printed circuit boards at home i often faced with the problem of “the bulbous” vias. Usually homemade double-layer boards soldering from both sides with the thin wire, the result usually satisfied but if you need to make VIA under the chip TQFP48, SOIC16 and that’s is a real problem, if contact is very bulbous it will be simply impossible cleanly solder chip as its legs will hang in the air.

I suggest you create your own version of flat vias.



CNC machine carves piece of PVC

And now it is a significant day, CNC machine comrade. Beehiwe involved in the whirlpool a busy amateur life.

First thing for testof  CNC was building coil for homemade model metal detector Quasar. Construction of metal detector can be found on the author’s website

The material for the body coil was chosen foamed sheet pvc plastik 3mm thickness. Easy material pliant white which  sold in stores that sell materials for advertising makers, simply cuted with paper knife and glued . Since it was glued in a sandwich  thickness 9mm machine had to mill body of coil.

And now photos))))



Development board for M10 Quectel GSM modem

I always dreamed about a development board for GSM modems.

When  choosing a modem I stopped at Quectel M10.

And so what it includes:


  • The basis of the module M10 Quectel
  • Quad-band version: 850/900/1800/1900 MHz
  • Multi-slot GPRS: Class 12/10/8
  • GPRS mobile station: Class B
  • Compatible with GSM: Class 4 (2W @ 850/900 MHz) Class 1 (1W @ 1800/1900MHz)
  • Support of voice services with output to a separate connector
  • Integrated Data Service: TCP / IP, HTTP, SMTP, FTP, and more
  • SMS, MMS, WAP and fax
  • Phonebook with Search
  • Integrated ringtones
  • Supply voltage range: 3.4 to 4.5 V (4.0 V type), or 5.0 W
  • Low power operation: 1.1 mA @ DRX = 5: 0.7 mA @ DRX = 9
  • Operating temperature range: -45 °C to +85 °C
  • Dimensions: 46 x 38 mm

And surfed spaces Internet i found a Czech  site with such board.

PGSM – GSM/GPRS module M10