Recent content by Mike cz
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LED measuring - lumens, efficiency and spectral characteristics
These data are for each LED in the table of Graph Spectral Characteristics: Czech...................English Napětí[V]..............Voltage [V] Proud[mA].............Current [mA] Výkon[W]..............Power [W] Světelný tok[lm]....Luminous flux [lm] Účinnost[lm/W].....Efficacy [lm/W]...- Mike cz
- Post #3
- Forum: Non-Flashlight LED Forum
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LED measuring - lumens, efficiency and spectral characteristics
Measurements were previously published in the local forum:http://forum.fotonmag.cz/index.php?showtopic=886&st=0&start=0 Method of measurement and equipment -Measurements are performed in the laboratory with an integration sphere and a spectrometer in the Technical University in Liberec. -The...- Mike cz
- Thread
- Replies: 7
- Forum: Non-Flashlight LED Forum
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Photos did not fit into the first report.... [IMG] added electronics for constant current...
Photos did not fit into the first report.... [IMG] added electronics for constant current [IMG] SST-50 on a new cooler (glued using "Arcit Aluminia) and 0.5 mm aluminum sheet [IMG] 0.5 mm aluminum plate on the SST-50 [IMG]- Mike cz
- Profile post
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Hi Bob, I have Romisen complete. I stuck SST-50 directly on a new cooler using "Arcit...
Hi Bob, I have Romisen complete. I stuck SST-50 directly on a new cooler using "Arcit Aluminia" for perfect heat dissipation. And I made a cooler from above the SST-50 from 0.5 mm Al plate. This plate also divert heat to the Al reflector. I have done thermal protection in Romisen by using PTC...- Mike cz
- Profile post
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Mag 3 "C" SST-90 MG aspherical with LDO10C Driver and 26650's - UPDATE: VIDEO ADDED
Re: Mag 3 "C" SST-90 MG aspherical with LDO10C Driver and 2 26650 IMR's 10 amps Nice mod...:twothumbs The voltade DC-DC switch is my idea. I used voltage DC-DC switch(30 amperes) with PTC thermistor for temperature compensation as the first in my Romisen@P7...- Mike cz
- Post #7
- Forum: Homemade and Modified Flashlights Discussion
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Romisen RC-T6@6xsst-50 - short 7500lm
ANSWERs: I make beamshots comparison with "standard'' flashlight during 7-14 days, I have exam now ... Insulate reflector is not needed, but I use the thermal pads for transfer heat to the reflector ... Romisen has 3mode, I can set 5-100W for every one of them For 18,650 Emmerich is not...- Mike cz
- Post #6
- Forum: Homemade and Modified Flashlights Discussion
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Romisen RC-T6@6xsst-50 - short 7500lm
I made a similar lamp here. I finished Romisen at Christmas (more information on the local forum), but I had a problem with LEDs ... I had to re-solder LEDs, and I have not complete the Romisen now, because I have exams on university and a little time ... I made this flashlight per order for...- Mike cz
- Thread
- Replies: 7
- Forum: Homemade and Modified Flashlights Discussion
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EMMERICH IHR18650 - 1500mAh, 15C What is it? Is better than AW IMR18650?
I have at home 4 EMMERICH IHR18650 cells, these cells have stable voltage at high currents. On package is written, "Sony Lithium Ion Akku Mangan US18650V1 HBG", but probably they are not these cells " Sony US-18650-V " Tests are from the local forum of "jirik cz", measured on the device with...- Mike cz
- Post #2
- Forum: Flashlight Electronics - Batteries Included
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EMMERICH IHR18650 - 1500mAh, 15C What is it? Is better than AW IMR18650?
I found EMMERICH IHR18650 1500mAh - constant discharge current 10C and burst discharge current 15C(over 20A) batteries. These batteries, I found only on http://www.conrad.com/ (homepage Conrad is a German) - this site is credible... EMMERICH IHR18650 batteries are on German sites (14,95 EUR) and...- Mike cz
- Thread
- Replies: 2
- Forum: Flashlight Electronics - Batteries Included
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Best place to buy SST-50's and SST-90's??
I have ordered 25 pieces SSR-50-W57S-R21-GJ200 from EBV elektronik. Tomorrow I expect delivery. Price from EVB cca 24EUR /pc. Minimum order is 25 pieces. I'm from the Czech Republic.- Mike cz
- Post #15
- Forum: Homemade and Modified Flashlights Discussion
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where to find xre on 10mm or 12mm board?
XR-E Q4 on a 11,5mm board are in Romisen RC-T6. I have 6 x XR-E Q4 from Romisen RC-T6 at home.- Mike cz
- Post #6
- Forum: Homemade and Modified Flashlights Discussion
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Romisen@6xSSC P7 DSVMI mod - 4500 lumen!
Techjunkie: The figure shows SMD case 0805. In this case may be resistor, thermistor, capacitor or inductor. The termistor is soldered on top PCB. Driver is controlled by series-parallel combination of resistors and thermistor. Selecting the correct value of resistance is lengthy... Al Combs...- Mike cz
- Post #52
- Forum: Homemade and Modified Flashlights Discussion
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Romisen@6xSSC P7 DSVMI mod - 4500 lumen!
For example I give voltage DC-DC switch without control thermistor and with control thermistor. I measure voltage on resistor 4.3 miliohm and then I calculate the current. - in Romisen were used poor and old 18650 2000mAh. (My TF 18650 I lost at home.):grin2: Higher currents were for 18650 death.- Mike cz
- Post #49
- Forum: Homemade and Modified Flashlights Discussion
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Romisen@6xSSC P7 DSVMI mod - 4500 lumen!
I have not at home arctic alumina adhesive or similar. I hurried and I put a thin microtene spacer(plastic)! Works perfectly. Paste is MX2. I measured the temperature of flashlight and simultaneously voltage on SSC P7. The temperature of flashlight was 49°C and voltage on SSC P7 is decreased...- Mike cz
- Post #48
- Forum: Homemade and Modified Flashlights Discussion
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Romisen@6xSSC P7 DSVMI mod - 4500 lumen!
I didn´t think about selling Romisen. I make flashlights for pleasure, but I can produce Romisen for you once again. Production would take one month. When you would like to buy Romisen earlier, I could sell you mine, but not to like. :) Costs for production Romisen 6x SSC P7 are cca 250$...- Mike cz
- Post #43
- Forum: Homemade and Modified Flashlights Discussion
