BWD engineering the GPSA006W3

very apx.* op. of the Solar Charger

PS! the numeric values on the plot are illustrative*

the valid formula for thishit seems to be ::
IF no clouds
prod. ( ( 8h/d + 4/2 h/d = ) 10h/d ) × 43.6mA = 436mAh/d
apx. 5d to charge batteries from 20% to 100% of nom. capacity
( usually it takes 2 to 3d . . . ? 55% to 95%  e.g 4x SB in parallel (60 in²) should 2 the 3-ck in 1d )

Update : results of a "Quick Test" (applies to solar cell only) ::

EP -- ( values below (have likely 1.5 to 2.5 significant digits !!!) ) based on solar-cell´s double output power !!! or max. power diffused on internal resistance at short circuit !!! -- sampled on 2 spring afternoons @ apx.60°N (Sun filtered by Space´s dust + Earth´s atm..+ packet-window´s 2-ble layer of Si-glass)

Est.Peak double output power ( P_2PK (= ε · r) ) : 1.163698202 W
*Speculative "no load" terminal voltage ( ε ) : 6 V
*Computed internal resistance ( r ) : 30.935856 Ω

note : * --  the values are valid for P_2PK or at max. "intensity of a Sun" and will respectively drop,increase at lower intensity levels + there are reason to believe that ε , r also depend on load ( I²R )

---

Update+ : refined experiment (sampling the I , U and ε) ::

[Eop]

about -- NiMH charging & LM308 models

NiMH Charging :: notes
charging from 12.6 V automotive 70Ah PbSO4
(a) initial current no load limit 100mA and grows fast
-- faster when cell is more empty - up2 10+ A !!!
(b) initial voltage current limit 50Ω 4W metal film
2.17V [12:23] after 2+ h charging
1.72V [15:34] 3h 600mAh 1:4-th of capacity
1.85V 190mA [17:25]
1.79V 190mA [17:50]
1.79V 190mA [18:13]
1.79 1.800 V 190 mA [19:33] 7.2h 1400mAh(200mA) 60%
1.80 1.798 V 190 mA [20:20]
1.79 1.796 V 190 mA [21:12] 8.8h 1675mAh(190mA) 70%
-- ??? so far the battery have had no heating up over the ambient
-- (whitch would indicate reaching the full charge) ??? (see *note)
1.77 1.782 V 180 mA [22:39]
1.77 1.777 V 190 mA [23:17] 10.9h 2071mAh(190mA) 78% (*2650mAh)
1.78 1.788 V 190 mA [ 0:21] 11.6h 2274mAh(190mA) 86% Label.val*
Final 1.489 >> 1.463 >> 1.340*

1.770 V 190 mA [ 0:27] start.2 *%
1.610 V 190 mA [ 2:09] 1.7h 323mAh 12%
1.600 V 190 mA [ 9:11] 8.7h 1659mAh 63%
1.600 V 190 mA [10:51] 10.4h 1976mAh 75%
1.596 V 190 mA [12:38] 12.2h 2315mAh 87%
Final 1.486* >> 1.450 >>

* note :: the DURACELL´s MODEL : CEF14KTNEU
-- INP : 100÷240~VAC 50/60Hz 8W
-- OUT : 5.6V 360mA (4x AA NiMH) / 2.8V 160mA (2x AAA NiMH)
as i remember output some 300÷320mA and heated up the AA-s
while the Resistor Ltd. charging of 190÷240mA did NOT !!!
??? are the factory chargers in purpose set to shorten your
accus lifetime ???

---

LM308 LT-provided & customized component level model compared ::

[BLUE : GREEN : RED] CustomCL.1 : CustomCL.2 : LT´s - .CIR

The TEST is setup to minimize the batch err. -- however never verified that this is what it actually does !!!

... minor modifications ...

===============================================

Fast / poor instrumentation mode test ::

["BLUE"]

["GREEN"]

["RED"]

---

[EoP]

Two random voltage regulators (practical)

a pre-conditioner (the 1-st of 2) for 9V linear reg. amazingly falls to that 10% of circuits that GO as they simulate !

an error-trial fast compile of the 9V from 12.8V - even more amazingly the circuit falls to that 2% of circuits that actually GO better than they simulate -- this 1 has 2...3mV output change on load variation -- donno what happens if we vary the input . . . likely the bias increases decreases along the V.in resulting unspec. change for V.out . . . not tested -- the russian KT815 mounted on about (both sides tot.) 1²' (1side tot.) ½²' heatsink (that seems to be sufficient for <avg.100mA <peak.240mA I.out)

[EoP]

Experimenters fun

is making these . . .

durable reusable relatively high conductive connectors(wires) . . .

. . . this time for replacing a TF in a practical flasher circuit

passed couple of miss references :: the one that is unknown is I.out and is about 30mA per LED -- the curious stuff is that if you monitor the circuit through multimeter 10A ranges you get the efficiency reading about 33 to 44 % -- if you remove output Amp.-m the U.out climbs to 2.881 , indicating what is shown (the 84% efficiency) -- and this is really weird ???
+ the R3 is in real bit above 170Ω (the simulation uses the ZTX1048A in place of MJE13005 -- there is a reason to do so & BC847C in place of its Russia´s analogue)
++ the transformer is rewinded on a a faulted HV coil LCD back-light feed adapter´s from Scanvægt´s 8362 from past century XD muhahaa - took several weeks to solve the glue off (in principle with a paint remover) the TF . . . F;T it can be re-used . . .

[EoP]

microbe hour DTL + (extends prev.)

as the task has been to def. simple(to build) yet reliable logic base that'd operate in A(A(A)) life cycle (voltage range 1.46(1.57) dn2 1.0V (after that the battery is usually empty and can't be used for extended operation as it fast drops it's voltage) but including the NiMH the range is somewhat 0.8 to 1.6 V) i continuously 're interested in every sh¡t that looks like it

... so the "predecessor" of the one shown in prev. post

 /!\ the above is Spice simulation - i doubt the inverter gets into that speed in real /!\

the real inverters XS & UN "series" compared - static I/O dependency is shown (the output load is voltmeter only)