Hardware Reference¶

PCB Versions¶

System BLUE¶

Symbols: = circuit = layout = partlist = gerber

PCB 16 H-Field amp¶

• 16.0: PDF
  • Initial release
• 16.1: PDF
  • R_24 -> 2.2k

• 16.2: PNG

  • ??

  

• 16.3: ?

• 16.4: Eagle Eagle Gerber Partlist

  • protection diodes replaced
  • gain increased by 50%

  

PCB 17 E-Field amp¶

• 17.0: PDF
  • Initial release
• 17.1: PDF

• 17.2: PNG wrong schematics

  • L1 ?

  

PCB 19 Controller¶

• 19.0: ?
• 19.1: PDF
• 19.3: PDF
• 19.3b: PDF
  • pad next to the USB jack is now connected to gnd
  • added a 10uF capacitor at the output of IC 505
• 19.4: PDF PNG
  • exchanged the positions of the GPS module with the SMA connector and the network connector
  • removed the jumper for the supply voltage for the E-field preamplifier
  • SWD connector now has a pin for the 5 Volt supply voltage
• 19.5: PNG
  • Changed to u-blox M8

• 19.6: PNG

  19.6 Changelog

  • capacitors exchanged with GRM1885C1H682JA01D
  • capacitors exchanged with 80-C0603C123J3G
  • capacitors not replaced, 22n capacitors not available in 0603
  • Level shifter exchanged with SN74LV1T34DBVRG4
  • Voltage regulator replaced with MCP1755S-3302E / DB
  • L700 replaced by 60R FB (BLM21PG600SN1D) in series with 0.27 R (ERJ-3RQJR27V), 10u in series with 0.27R (ERJ-3RQJR27V), connected in parallel to 1u and 0.1u, (0.27R (ERJ-3RQJR27V) , instead of 0.22R (ERJ-3RQJR22V) to reduce the number of different components)
  • L600 replaced by 60R FB (BLM21PG600SN1D) in series with 0.27 R (ERJ-3RQJR27V), 10u in series with 0.27R (ERJ-3RQJR27V) parallel to 1u and 0.1u
  • L800 replaced by 220R FB (BLM18EG221SN1D) in series with 0.27 R (ERJ-3RQJR27V), 10u in series with 0.27R (ERJ-3RQJR27V) parallel to 1u and 0.1u, (0.27R (ERJ-3RQJR27V) instead of 0.33R (ERJ-PA3J5R1V) to reduce the number of different components)
  • R804 exchanged with 5.1R (ERJ-PA3J5R1V)
  • R505, R506, R507 exchanged with 1.5R (RC2512JK-071R5L), a compromise between the old 2.2R and the proposed 1.0R, I am concerned that otherwise not enough heat will be dissipated
  • L501 replaced by 220R FB (BLM18EG221SN1D) in series with 0.27 R (ERJ-3RQJR27V), (0.27R (ERJ-3RQJR27V), instead of 0.22R (ERJ-3RQJR22V) to reduce the number of different components)
  • C503 replaced by 10u, 47u in series with 0.27R (ERJ-3RQJR27V) connected in parallel to 10u and 0.1u, (0.27R (ERJ-3RQJR27V), instead of 0.22R (ERJ-3RQJR22V) to increase the number of different components)
  • L502 replaced by 220R FB (BLM18EG221SN1D) in series with 0.27 R (ERJ-3RQJR27V), (0.27R (ERJ-3RQJR27V), instead of 0.22R (ERJ-3RQJR22V) to reduce the number of different components)
  • C503 replaced by 10u, 47u in series with 0.27R (ERJ-3RQJR27V) connected in parallel to 10u and 0.1u, (0.27R (ERJ-3RQJR27V), instead of 0.22R (ERJ-3RQJR22V) to increase the number of different components)
  • L500 replaced by 60R FB (BLM21PG600SN1D)
  • Additionally on V+ two 1000u electrolytic capacitors
  • C [1,2,3,4] 27 replaced by 0.1n
  • Name change
  • C605 replaced by 10u
  • 75R adds between IC600 and uC
  • C801, C802, C804 expanded with 1u

  

PCB 20 Complete Boards¶

PCB 20 contains PCB 16 + 17 + 19 on one PCB.

PCB 20.3:
 * extended the E-field antenna to the empty fill-board to the left

PCB 21¶

See here

PCB 22: BLUE Mini¶

• 22.0 / 22.1: Development boards
• 22.2: PNG PNG

System RED¶

• PCB 10.5: Eagle Eagle
• PCB 12.5: Eagle

Configurations¶

PCB Controller Ids¶

The PCB-ID pins have internal pull down.

RED¶

PCB 10.4 / 10.5 have the same id.

BLUE¶

The PCB-Offset of 4 is defined in the firmware.

+ = High
- = Low
NC = Not connected
* accidentally not connected on some boards

PCB Amplifiers Ids¶

RED¶

On RED the amplifier id is transmitted via USART from the amps.

BLUE¶

On BLUE we know the on board amplifiers, but not their config. Here we have the solder jumpers J0 and J1. J0 has to be closed when filter ICs are installed. J1 is not used.

* configured with internal pull-up

** defined in firmware when PCB-Id is 9 (Blue-Mini)