Article index
Mostly I write reviews, but once in a while I also writes something else. Due to the large amount of reviews these articles can be difficult to find on the category pages. For this reason I have duplicated them here.
A look at high end multimeters
![DSC_4599](https://lygte-info.dk/pic/DMMHighEnd/Images/DSC_4599.jpg)
Multimeter frequency response
![Multi](https://lygte-info.dk/pic/DMMFrequencyResponse/Multi.png)
Charging LiFePO4 batteries, algorithms
![DSC_1927b](https://lygte-info.dk/pic/BatteryLiFePO4charge/DSC_1927b.png)
Multimeter guide
![DSC_4898](https://lygte-info.dk/pic/DMMGuide/DSC_4898.jpg)
Low current discharge of batteries part two
![calendar](https://lygte-info.dk/pic/BatteryLowCurrentDischarge/calendar.png)
Multimeter protection and safety
![DSC_3327](https://lygte-info.dk/pic/DMMDesign/DSC_3327.jpg)
Multimeter design
![DSC_3327](https://lygte-info.dk/pic/DMMDesign/DSC_3327.jpg)
Low current discharge of batteries
![calendar](https://lygte-info.dk/pic/BatteryLowCurrentDischarge/calendar.png)
Multimeter and component testing
![DSC_7714](https://lygte-info.dk/pic/DMMComponentTesting/DSC_7714.jpg)
Multimeter probes
![DSC_4788](https://lygte-info.dk/pic/DMMProbes/DSC_4788.jpg)
Multimeter and voltage measurements
![DSC_3321](https://lygte-info.dk/pic/DMMVoltage/DSC_3321.jpg)
Multimeter and pulsed DC current (PWM)
![PWMCurve](https://lygte-info.dk/pic/DMMPWM/PWMCurve.png)
Tolerance specifications for multimeters
![DSC_5527](https://lygte-info.dk/pic/DMMTolerances/DSC_5527.jpg)
Clamp meters magnetization, demagnetization and offset
![DSC_8801](https://lygte-info.dk/pic/DMMClampDemag/DSC_8801.jpg)
Multimeters and current measurements
![DSC_4731](https://lygte-info.dk/pic/DMMCurrent/DSC_4731.jpg)
Multimeters and thermocouples
![DSC_4693](https://lygte-info.dk/pic/DMMThermocouplers/DSC_4693.jpg)
Disassembly of 9V primary batteries
![DSC_7824](https://lygte-info.dk/pic/BatteryDisassembly9VAlkaline/DSC_7824.jpg)
Disassembly of GTL batteries
![DSC_0795](https://lygte-info.dk/pic/BatteryDisassemblyGTL/DSC_0795.jpg)
Comparison of AA battery chemistries (Updated)
![DSC_3398](https://lygte-info.dk/pic/BatteryAA/DSC_3398.jpg)
Batteries with ridiculous ratings
![DSC_0007](https://lygte-info.dk/pic/BatteriesRidiculousRatings/DSC_0007.jpg)
Battery charge termination test
![Termination](https://lygte-info.dk/pic/BatteryChargeTerminationTest/Termination.png)
Disassembly of 9V LiIon batteries
![DSC_7475](https://lygte-info.dk/pic/BatteryDisassembly9VLiIon/DSC_7475.jpg)
Disassembly of USB charged batteries
![DSC_6927](https://lygte-info.dk/pic/BatteryDisassembly18650usb/DSC_6927.jpg)
How does a usb charger work?
![DSC_6476](https://lygte-info.dk/pic/SMPS%20workings/DSC_6476.jpg)
USB power information
![DSC_5861](https://lygte-info.dk/pic/USBinfo/DSC_5861.jpg)
How far can LiIon be discharged?
![title](https://lygte-info.dk/pic/BatteryLowVoltage/title.png)
Disassembly of UltraFire 9900mAh 18650 battery
![DSC_4045](https://lygte-info.dk/pic/BatteryDisassembly9900mAh/DSC_4045.jpg)
My charger do not charge LiIon to 4.2V, is it faulty?
![DSC_3633](https://lygte-info.dk/pic/BatteriesCharge4.2V/DSC_3633.jpg)
Battery charging NiMH
![DSC_2363](https://lygte-info.dk/pic/batteryChargingNiMH/DSC_2363.jpg)
A look at different charge methods.
A look at QI (Wireless power transfer)
![DSC_1443](https://lygte-info.dk/pic/QI/DSC_1443.jpg)
Energy at low voltage in alkaline batteries
![DSC_1251](https://lygte-info.dk/pic/batteryEnergyLowVoltage/DSC_1251.jpg)
Disassembly of some UltraFire batteries
![DSC_9685](https://lygte-info.dk/pic/BatteryDisassemblyUltraFire/DSC_9685.jpg)
Nitecore chargers the i4 family and clones
![DSC_8439](https://lygte-info.dk/pic/NiteCore/DSC_8439.jpg)
Discharge protection test
![Discharge%20Keeppower%2018650%203400mAh%20(Black)%200.001A%20small](https://lygte-info.dk/pic/DischargeProtectionTest/Discharge%20Keeppower%2018650%203400mAh%20(Black)%200.001A%20small.png)
Is my battery protected?
![DSC_7029a](https://lygte-info.dk/pic/DischargeProtectionTest/DSC_7029a.jpg)
My lab setup
![DSC_6634](https://lygte-info.dk/pic/Equipment/DSC_6634.jpg)
What equipment I uses and how it is arranged.
Disassembly of cheap 18650 battery
![DSC_5479](https://lygte-info.dk/pic/BatteryDisassembly5000mAh/DSC_5479.jpg)
CR123A and rechargeable substitutes
![DSC_3335](https://lygte-info.dk/pic/BatteryCR123/DSC_3335.jpg)
Internal impedance/resistance of batteries
![ResistanceMeasurementA](https://lygte-info.dk/pic/Internal%20impedance/ResistanceMeasurementA.png)
Rewrapping a battery
Estimating remaning capacity in LiIon batteries
![ChargePercent](https://lygte-info.dk/pic/BatteryChargePercent/ChargePercent.png)
Building a high current adapter
![DSC_1310](https://lygte-info.dk/pic/CurrentAdapter/DSC_1310.jpg)
Measuring on a Flashlight
![DSC_5997](https://lygte-info.dk/pic/measurement/DSC_5997.jpg)
A illustrated guide on how to make the most common electrical measurements on a flashlight.
What is a Hobby Charger
![DSC_6175](https://lygte-info.dk/pic/HobbyChargers/DSC_6175.jpg)
A short explanation about hobby chargers and how to use them for flashlight LiIon batteries