Keeping old 2000's digital cameras into function (about batteries & simple chargers)

IMPORTANT: reverse (!) the polarity of the 4 diodes in the ZENER row, I made a mistake! Sorry for that.

How to keep old 2000’s etc digital cameras in function.

Some of them have extremely good properties, like the Pentax Optio E 30, say from 2006-2008, but that Pentax was brought to early on the market in Europe.

With (even) two 2300 mA-Hour Nickel Cadmium batteries that Pentax Optio E 30 could only work for 10 Minutes or so, that is a classic manufacturer failure.

Anyway: that does not have to do anything (!) with their extremely good lenses and high-tech light-sensitive and high resolution photonic chips/sensors.

Often (say) in the past 4 or 7 Mega pixels, but with a high resolution…. Sometimes better than modern (2019) camera’s, though I have to say that the camera lens & photonic chips developments of the past years are immense (2013-2019).

So here I give a solution/idea for these old HQ camera’s: mount a (quite) fierce battery of 2,4 Volt that can give out a current of (say) 500 mA or 1 Ampère at 2,4 Volts during a few (or 1, or 2) hours.

Could be that other 2000’s camera’s need a higher or other supply voltage/current, the principles stay the same. When their supply batteries/accumulators are no longer available: make them!

Good for the environment to NOT through these camera’s away.

With a good battery the camera can/will work properly again for many hours/years.

The charger in case of the Pentax Optio E 30 can be (was) simple: the 4 normal Silicon power diodes (0,7-0,8 V barrier voltage), all in a row, parallelled to the 2,4 Volt (2000 mA – Hour) Ni Cad batteries act as a “zener” diode, that limits the charge voltage to (say) 4 x 0,7 V = 2,8 Volt or somewhat higher, with a sure effect on the charge current, given the situation that the Ni Cad cells can be charged to max. 1,3 up to 1,6 V.

The series diode (“3 A” in the drawing) prevents that the NiCad cells discharge “over” the charger unit.

Chargers for higher voltage for 1990’s camera’s can be made due to the same principles: study the datasheet of the used accumulator, replace it with simple NiCad batteries, if necessary as a kind of “block battery” outside the camera. Does not look nice and looks unprofessional, but who looks at it that way?

Use the “blocking” diode (any Si diode of say 300 V and 5 Amp will do the job) to prevent discharging of the batteries over the “charger” unit.

Even with a too high charge voltage/current (of course within limits, don’t go higher than say 18 Volts, check the charge current and charge voltage with the appropriate Amp. and Volt meters) that zener acts as a voltage and (thus) current current limiter to these 2,4 V/2200 mA-hour Ni Cad cells.

Best idea: slowly charge them to their peak. Of course: standard charge situation is 1/10 x the capacity, so here: 220 mA during 10 Hours (Ni Cad cell = 2200 mA/per hour) .

The Si diodes (“zeners” and blocking diode) can get warm or even hot, but they protect the two Ni Cad cells by limiting the voltage to them.

Do not over-charge NiCad cells, switch the charger “off” (time clock, for a few Euro’s to buy everywhere) when the NiCad cells are charged completely ofter complete depletion, or other wise (half depleted = half time).

With completey depleted NiCad cells the charge time can be calculated. 1/10 of the Ampère hour for which the NiCad cells were made is is normally safe, so a 2200 mA/hour Ni Cad cell needs 1/10 x 2200 mA/Hour = 220 mA charge current during during 10 hours).

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In thematic order you can find these video’s under the “comments” section.
Important: to find all the links to the (+/-700) video’s on my YT Channel, select, in the comments section, “NEWEST FIRST”

My books about electronics are available via the website from “Lulu”, search for author “Ko Tilman” there.

There is an important video via which you can buy a document where I give links to many of my video’s, published between 2010 and 2018.

Link is:

My books are also available via Barnes and Noble and via Amazon.

Regarding all my video’s: I constantly keep them actual, so the original video’s with the most recent information are always on YouTube. That is the source, and search there. When my video’s are reproduced or re-edited on other websites/channels you can not (!) be sure about the original content (=really working electronics) and important adaptations to the circuits.

Be aware of that, I saw on the internet my circuits reproduced in a poor or even not proper way. I can not help that, sorry. Update 16 June 2019.

This video is an attribute to the many environmental questions, nowadays, say 16 June 2019.


How to test Car bridge rectifier charging DC digital voltmeter | Wind turbine generator.

In this video, we connect the digital multi-volt meter to record and display the DC voltage produce by the Wind turbine when in operation. Take notice of voltage increase and decrease. Voltage over 20volt and be identified for a brief moment while the volt meter goes blank on it’s display screen. The charge rate of the automotive bridge rectifier is 110amp @12 volts is 1320watts. Understand the energy distribution is variable limited base on wind condition and speed. The system circuit over-charging is regulated by energy down time. So the highs and lows of energy produce by the with turbine is average has a method of regulating the 12-14.5 battery volts. Since the batteries are place under load at the same time it’s been changed by the wind turbine, the over-charging is surpress/decrease by utilities consumption through the invertor. The complete off-grid is supplemented with two 300watt 30amps solar panel charge controller to maintain battery voltage should the wind and turbine generator is in down time and not producing energy. The solar charger limited it’s panel only voltage to 14.5volts.

This video is a comparison. Showning the same energy distribution behavior with the wind turbine generator charge controller. Noticed there are no difference amount the OEM charge controller (black box) and the car automotive alternator bridge rectifier device (aluminum plates).


Optima Digital 1200 Battery Charger Review


The Optima Digital 1200 Battery Charger does much more than just charge a battery. Most chargers, you have to manually set the charge rate, and it will cook your battery if you don’t monitor it. The Optima Digital 1200 actually handles the process for you and shifts into a Maintain (trickle) mode to keep from overcharging and overheating your battery.

This Optima Digital 1200 not only works great for AGM (Glass Mat) batteries, but it’s also great for flooded or Lead Acid batteries as well. In fact, the Digital 1200 can sometimes bring a “dead” lead acid battery back to life.


Optima Digital 1200 12V Performance Battery Charger and Maintainer

Special Discount on Optima Digital 1200 12V Performance Battery Charger and Maintainer, Click here to get it:

Optima Digital 1200 12V Performance Battery Charger and Maintainer – optima digital 1200 12v performance battery charger and maintainer.
the optima® chargers™s digital 1200 battery charger enhances the performance of optima and other agm batteries recovers deeply discharged battery and extends battery life.
optima digital 1200 12v performance charger unboxing. watch this video to learn how to get the best charge on your battery using optima batteries digital 1200 and 400 chargers. this video shows the unboxing and activation of the optima 12 volt performance battery charger and maintainer.

optima batteries digital 1200 battery charger maintainer review. optima digital 1200 12v performance battery charger and maintainer see complete and helpful info click here : ..
review: optima digital 1200 12v performance battery charger and maintainer.


Review: Optima Digital 1200 12V Performance Battery Charger and Maintainer – Optima Digital 1200 12V Performance Battery Charger and Maintainer
Charges batteries other chargers cannot , down to 1.25V; Car audio/video applications exceeding 250 watts over the OE system Integrated (+) charging clamp LED work light with nonslip grips Charges, conditions and maintains 12V AGM and flooded batteries LCD battery charging gauge and quick-set selections for easy operation USB charging port compatible with smartphones, cameras and tablets Charges 12V batteries other chargers cannot Charges faster than competitive chargers with up to two times the output Won’t overcharge your battery Maximizes your batteries’ performance

More detailed info –


Review: Power Bank Portable Charger – 20000mAh High Capacity with Digital Display LED Screen 2 US.. – Power Bank Portable Charger – 20000mAh High Capacity with Digital Display LED Screen 2 USB Output & Dual Input External Battery Pack Compatible with All The Phone
【SMART CHARGE TECHNOLOGY】The USB charging ports will choose the best and fastest amperage rate for your device. You will enjoy high speed and fast charging experience while keeping your devices safe from over-charging, overheating. 【LARGE CAPACITY】Power Bank 20000mAh capacity allows to charging for iPhone X/8/7/6/6s 6 times, iPhone 8/7/6 plus 4.5 times, Galaxy S9/S8/S7/S6 up to 4 times, or iPad Mini more than 2 times. 【DUAL OUTPUT AND DUAL INPUT】the external battery power bank 20000mAh with 2 USB output ports that allow you to charge two devices simultaneously and recharge your power bank via Type-C or micro-USB port. 【LED POWER INDICATOR】The Adruo external battery pack charger features a unique smart LED power indicator that keeps you informed on the status of charging and remaining capacity, so you know when the power bank is running low and needs to be recharged. 【HIGH QUALITY GUARANTEE】Buy it 100% Risk-Free.The YPLANG big capacity power bank will meet all your needs, 12-Months Warranty. Feel free to contact us if you have any problems.

{More detailed infoCheck this out for more infoLots more detail hereCheck here for extra informationMore to read here} –


Opus BT C3100 Smart Digital Intelligent 16850 Battery Charger

Product shown in the video is a smart 18650 battery charger.

In the video, I am trying to discharge 4 x 18650 battery to test their nominal capacity to see if it’s real/fake battery. However, the discharge process is some how disturbed which the LCD display show 0mA under the discharge mode. So I am wondering if it’s the product is faulty or not.

Product bought from Aliexpress, Link are down below:


Use Digital Gram Scales If You Care About Every Gram

Digital gram scales are devices that literally measure weight with an accuracy level of decigrams. For anyone who does not know what a decigram is, it is one-tenth of a gram. In situations where one has to care for the weight to a depth of every gram, using a scale of this precision is a great option.

What is the use of a digital gram scale? The usage is wide. One can measure right from the weight of their food constituents and scientific experimental ingredients to jewelry and weights of babies. Clearly these examples are driven by their own requirements. These scales do not necessarily measure in grams, they can also measure in ounces and pounds. It is only that the level of accuracy is at a sub-gram level.

Added a good-quality weighing platform that can be easily cleaned if needed, a large display with good contrast, backlight no display, keypad calibration and protective cover, a digital gram scale can become an attractive thing to own. These scales are usually lightweight. In fact, there are smaller scales available today that are lighter than 100 grams. There are heavier ones too. Some of the best scales would be accurate till even a centigram – one-hundredths of one gram.

In fact, these scales are normally available at such a good price bargain and can add so much value to your life that you may feel it is more on the lines of obtaining a degree of independence at an extremely cheaper rate. There is not much sense in making a compromise on whether to own one or not at this level, if you are still pondering on whether or not it is worth for you to have your own digital gram scale.

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Olympus Evolt e-510 Digital Camera Review

The Olympus E-510 is a 10.9 mega pixel digital camera, supports CompactFlash memory and has a 14-42 mm lens. The E-510 certainly shows some pedigree having a solid metallic case where many others plump for less firm materials. The weight is noticeably even without the lens attached, but it is intelligently balanced so as not to immediately put the user at a disadvantages. The grip is comfortably large enough to allow for a decent sized hand to grip round, and the back has more then enough room to plant a thumb without accidentally selecting functions.

The Olympus E-510 saves space and battery power by doing without a LCD, instead employing the rear screen to display current settings. The display is reassuring basic, keep a functionality rather than
flashy sensibility.

Keeping much of the camera basic can have a detrimental effect on the end image quality, as is evidenced by the portrait shot. Although the focus is sharp and the contrast decent enough. With the sports setting selected both the focus and drive speed is excellent with the constant autofocus keeping up well with the subject.

The Olympus E-510 is a robust and well laid out camera, performances up to expectations. Each image is technically impressive and consistent.

The Olympus E-510 was voted European camera of the year by EISA. The Olympus Evolt e-510 Digital Camera is a beautiful camera with great functions such as Image Stabilization, a Dust Reduction System (SSWF-Super-Sonic Wave Filter) and Live View, it has everything the amateur and professional photographer could want. Having previously used only digital cameras. It is quite lightweight (for an DSLR) and the image quality is vividly breathtaking.


Digital Multimeter Review

A digital multimeter is an electronic measuring device that combines all the most commonly used measurement functions into one small, portable hand-held unit. Most multi testers come with measurement and testing functions for voltage, current, resistance, continuity, testing diodes and some with temperature, both in Celsius and Fahrenheit. Some even have capacity to measure frequency.

The old style of meter was analogue not digital (the technology was not available back then) and was sentenced to inaccuracies. With this type of meter you could look at a reading, say on the resistance scale and if you were not looking at the needle directly in front but off to the side, you would read an erroneous reading because you are looking at it from an angle . This called the angle of parallax. There is no parallax with electronics, now you just read the read out.

Nowadays, this must-have testing tool is for your tool box, garage, car trunk, etc. It's portability enables you to be able to take it with you wherever you go, and provides you with a multitude of features that help you achieve the accurate results every time.

The hand-held multimeter is also great for fault finding and field service work or as a bench instrument that measures with a very high degree of accuracy. It can be used to troubleshoot electrical problems in a wide array of industrial and household devices such as batteries, motor controls, appliances, power supplies, and wiring systems.

The Fluke company is a world leader and has been manufacturing the digital multimeter among other types of measuring equipment since 1948. They are widely known as among the very best instruments in their field for their accuracy, features and ruggedness. They are quality built to withstand day to day use in the field.

Also Fluke has provided a number of different models with different features. On certain meters this allows you to set the meter near a piece of equipment (magnetically attached so you are hands free) while you are handling the leads in a dangerous location and it can record over time important data that is required for the troubleshooting problem. Some meters can even troubleshoot problems before they happen.

In industry, this all adds up to minimizing down time. The meter must be reliable and consistent so the professional using it does not have to second guess any readings whatever the aspect of electricity it is measuring.

The look and feel of these meters is made for easy use. They are easy to see with their yellow cases and the back lit digital read out display. Even if darker conditions you can still read perfectly fine. The leads are easy to identify and if you plug the leads in the wrong hole or wrong polarity, the meter even tells you so with a loud beep. They are ergonomically made so that the hand-held units are comfortable to handle and hold.

In the case of the Fluke 289, it is made to record data over time and can be left on its own while you go off and do other jobs. The data can used as is or uploaded to a computer. This offers tremendous flexibility for study of a problem for the professional.

Finally, you get what you pay for. These meters are well worth the price. You will not regret the purchase of a Fluke digital multimeter.