10,000 subscribers on Youtube and Capacitor Discharge Explosions

Youtube sent me this as a reward

In a celebration of reaching 10,000 subscribers on Youtube, I blew up some pieces of wire with my 2500uF / 2kV Maxwell energy discharge capacitor storing 4kJ of energy.

I also started a new dedicated slow motion video channel, please subscribe if you like to see more non-electronics videos recorded at high speeds: https://www.youtube.com/channel/UCB2qu77PCr5i9zcs0sOhp4w/

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Chinese 2x100W TDA7498 Amplifier – Test and THD+n Measurements

I wanted a small Bluetooth amplifier for my work shop and bought some cheap bare-board versions from Ebay. This TDA7498 design is over-advertised, but not as bad as other cheap bluetooth amplifiers from ebay.

Test, frequency response and THD+n measurements show how good it compares to the promised performance of the TDA7498 datasheet.

Not a paid review, bought for my own money and independant rant! I can only hope this will turn up in peoples search results if looking into buying this kit.

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Teardown of a 5 kVA / 4 kW Eaton EX5RT UPS System

Teardown of a Eaton EX RT 5 kVA UPS model. The topology is a on-line double conversion with PFC (Power Factor Correction) system for a active power output of 5 kVA / 4 kW.

A over view of the whole UPS unit with battery charger and input plug/disconnector section.

The input section has all the common/differential mode noise filtering with inductors and capacitors as normally seen in inverters. Varistors and TVS diodes to handle transient voltages.

The PFC frontend after the input section consists of a half-bridge SCR module, a Semikron SKKT 57B12E, rated for 1200 VDC at 57 Ampere.

The main inverter consists of a AC to DC converter and a DC to AC converter with the battery bank in the middle as the DC bus.

Infinion K25N120 IGBTs is used in the AC to DC inverter and Infinion G30N60 IGBTs is used in the DC to AC converter.

The controller is a Nxp Freescale MC9S12-family CPU. All MC9S12C-Family / MC9S12GC-Family members feature standard on-chip peripherals including a 16-bit central processing unit (CPU12), up to 128K bytes of Flash EEPROM, up to 4K bytes of RAM, an asynchronous serial communications interface (SCI), a serial peripheral interface (SPI), an 8-channel 16-bit timer module (TIM), a 6-channel 8-bit pulse width modulator (PWM), an 8-channel, 10-bit analog-to-digital converter (ADC).

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Chinese 2x50W Bluetooth Amplifier, Or Is It? A Poor Abused TDA7492P Design

I wanted a small Bluetooth amplifier for my work shop and bought some cheap bare-board versions from Ebay.

This poor TDA7492P design is over-advertised and abused enough that I requested my money returned from the seller.

Discussion of this review: https://highvoltageforum.net/index.php?topic=1057.0

Not a paid review, bought for my own money and independant rant! I can only hope this will turn up in peoples search results if looking into buying this kit.

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After Cleaning, What I Found… – End of Isolation, Day 42

I have turned my whole workshop around, been in every drawer, box, crate, container, shelf and cupboard. I sorted a lot of stuff, re-found a lot of things and threw nothing out! I start work again, it is no longer required to work 100% from home, but still to be planned to do so if possible.

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Whats In The Box?! – Isolation, Day 40

How many mystery boxes do you have in your work shop?

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3 kW Yaskawa Servo Motor Teardown – Isolation, Day 38

I scavenged a old 4 ton stone polisher machine for the best components and got off with a 3 kW AC server motor + drive, 4+0.55 kW variable frequency drives. In this video I teardown the Yaskawa SGMGH-30DCA6F-OY 2900W AC servo motor.

Trying to make the 3 kW servo drive run: https://www.youtube.com/watch?v=Cg3Qx6J6NzU

Teardown of the 3 kW servo drive: https://www.youtube.com/watch?v=Gc11BaQD8-s

Teardown of the 3-Phase IGBT Module Teardown – Fuji 7MBP50RA120: https://www.youtube.com/watch?v=xFNS1S0xedY

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3-Phase IGBT Module Teardown – Fuji 7MBP50RA120 From 3 kW Omron Servo Drive – Isolation, Day 36

I scavenged a old 4 ton stone polisher machine for the best components and got off with a 3 kW AC server motor + drive, 4+0.55 kW variable frequency drives. In this video I teardown the 7MBP50RA120 IGBT module that consists of 7x IGBT dies, diodes and internal protective circuits.

Trying to make the 3 kW servo drive run: https://www.youtube.com/watch?v=Cg3Qx6J6NzU

Teardown of the 3 kW servo drive: https://www.youtube.com/watch?v=Gc11BaQD8-s

Teardown of the 3 kW servo motor and encoder: https://www.youtube.com/watch?v=2TVYVU4zk34

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Omron/Yaskawa 3 kW AC Servo Drive Teardown – Isolation, Day 34

I scavenged a old 4 ton stone polisher machine for the best components and got off with a 3 kW AC server motor + drive, 4+0.55 kW variable frequency drives. In this video I teardown the servo drive that let the smoke out in the previous video.

Trying to make the 3 kW servo drive run: https://www.youtube.com/watch?v=Cg3Qx6J6NzU

Teardown of the 3-Phase IGBT Module Teardown – Fuji 7MBP50RA120: https://www.youtube.com/watch?v=xFNS1S0xedY

Teardown of the 3 kW servo motor and encoder: https://www.youtube.com/watch?v=2TVYVU4zk34

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3 kW AC Servo Drive From a 4 Ton Stone Polisher – Isolation, Day 32

I scavenged a old 4 ton stone polisher machine for the best components and got off with a 3 kW AC server motor + drive, 4+0.55 kW variable frequency drives. In this video I try to make the servo motor run despite missing a control panel that was gone from the machine.

Teardown of the 3 kW servo drive: https://www.youtube.com/watch?v=Gc11BaQD8-s

Teardown of the 3-Phase IGBT Module Teardown – Fuji 7MBP50RA120: https://www.youtube.com/watch?v=xFNS1S0xedY

Teardown of the 3 kW servo motor and encoder: https://www.youtube.com/watch?v=2TVYVU4zk34

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