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+--- Thread: Powering up puzzle (/showthread.php?tid=2203)
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Powering up puzzle - MonkeeRench - 2017-06-12
With the power switch off at the controller, when I plug in the USB power supply, all the LEDs seem to go thru test-blinking, then the Power and Mode LEDs remain on, just as they are when I turn on the power switch. The red LED on the connected E-Field pre-amp board is also always lit.
Confused -- shouldn't the power switch shut off everything?
RE: Powering up puzzle - kevinmcc - 2017-06-12
That should not happen if the switch is correctly connected.
The jumper should be removed from pins 5&6 and the switch will then connect them.
Note the pins with thicker red lines in lower left corner of the board layout.
http://www.blitzortung.org/Compendium/Hardware/PCB_20_3_brd.png
RE: Powering up puzzle - MonkeeRench - 2017-06-13
(2017-06-12, 23:03)kevinmcc Wrote: That should not happen if the switch is correctly connected.
The jumper should be removed from pins 5&6 and the switch will then connect them.
Note the pins with thicker red lines in lower left corner of the board layout.
http://www.blitzortung.org/Compendium/Hardware/PCB_20_3_brd.png
Thanks, Kevin, that worked like a charm! I really appreciate this forum in filling in the blanks of documentation that somehow eludes me. Another puzzle is on the layout of 19.3b which does not show the "Power" thru-holes where I connected the external switch discussed.
RE: Powering up puzzle - kevinmcc - 2017-06-14
Are these the instructions you were using?
http://en.blitzortung.org/Compendium/Documentations/Documentation_2016-05-04_Blue_PCB_20_1.pdf
Not sure what you mean by power thru-holes.
RE: Powering up puzzle - MonkeeRench - 2017-06-14
On my PCB 19.3b board (Sep. 2016), next to the pre-installed USB socket are two thru-hole pads labeled "Power", to which I connected my external power switch. On the layout I see no such thru-holes, only a single unlabeled symbol in the vicinity of the USB and the 5-6 header terminals.
RE: Powering up puzzle - kevinmcc - 2017-06-14
Must be an undocumented revision. Maybe on of the Devs can let us know?
RE: Powering up puzzle - DelandeC - 2017-06-14
On 19.3b, you have to close jumpers 5 and 6 to power up the all system.
Jumpers 1 and 2 have to be closed also to power the pre amplifier boards.
http://fr.blitzortung.org/Compendium/Hardware/PCB_20_3_brd.png
http://fr.blitzortung.org/Compendium/Hardware/PCB_19_3_sch.pdf
RE: Powering up puzzle - allsorts - 2017-06-14
Close. B-)
Short pins 5 and 6 of the S1 jumper block to apply power to the system.
Short pins 1 and 2 to provide +5 V to the E-field preamp.
Short pins 3 and 4 to provide +3.3 V to the E-field preamp.
Leave 1 and 2, 3 and 4 open to not power the E-field preamp.
Bad things are likely to happen is you short 1 and 2 at the same time as 3 and 4 or short pins 1 and 3 as doing so connects the +5 V rail to the +3.3 V rail...
The H-field pre-amp is powered directly from the + 5 V rail so is on when ever the system is powered up.
RE: Powering up puzzle - kevinmcc - 2017-06-14
I still think they should add a protection diode to the 3.3 V rail.
RE: Powering up puzzle - BobW - 2017-06-15
(2017-06-14, 23:12)kevinmcc Wrote: I still think they should add a protection diode to the 3.3 V rail.You are right. Nice shot nearby and the 3.3 volt rail is going high. There's a choke and a cap that will help keep it down -spike smoothed by choke, and eaten by cap. Same deal with 8 pin to amp except it's direct connected to +5, so what comes in gets on +5
Coax - Blitzortung or otherwise (CATV, Satellite, etc) - should go to ground block bonded to building electrical ground, and a surge suppressor can't hurt. Like this:
https://www.3starinc.com/dual_port_coaxial_cable_tv_satellite_ground_block_grb-2dhr.html?filter=%26fd6%3D32
https://www.3starinc.com/f_male_to_f_female_in-line_spike_protector.html
Same deal with the 4 pair to the preamp. Somthing like this. Be aware I've ordered one, and will be looking inside it to see if all 4 pairs have diodes and what kind. Nasty post on Amazon if it's crap.
https://www.amazon.com/gp/product/B00UYXRDU8/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1