Tag: Texas Instruments

Voltlog #128 – LM338 Constant Current Regulator Circuit

Welcome to a new voltlog, today we are building a very simple constant current regulator based on the LM338 linear regulator. This is a very robust and stable classical regulator that is being manufactured by many big names like ST and TI, it has quite a high output current  rating of 5A continuous, it even comes in a TO-3 can package but today we’re going to use a TO220 which is more commonly available.

To make a constant current regulator out of this, is very simple, the datasheet gives us the circuit we need to use and we only need a low value resistor to do that plus the optional input bypassing cap which is 0.1uF. We’re going to use this formula to calculate the value of the resistor, so the output current is equal to the Vref divided by the value of the resistor.

External references:

 

Voltlog #92 – InTheMail

Welcome to another Voltlog, today we’ll be taking a look at what I’ve been receiving in the mail recently. As much as you guys like watching this stuff, I also like getting all these electronic modules from China. I find it interesting every time I get my hands on a new circuit.

As always I appreciate feedback and discussions in the comments section below, please let me know what you think and don’t forget to like the video, that is always a clear indication of what kind of content you guys like seeing.

Here are links to all the items shown in this video:

Voltlog #54 – BQ24650 MPPT Charging Module

In this video I am taking a look at this compact BQ24650 Charging MPPT Module made by YZX Studio in China. You can use this module to improve the efficiency of your solar system while charging your battery.

Voltlog #13 – InTheMail AD9850 CC2541 CSR8615 OVC3860 Mifare

In this InTheMail episode I receive the following items:

  • AD9850 DDS Signal Generator Module 0-40MHz.
  • Bluetooth CC2541 4.0 BLE UART Transceiver Serial Module (Texas Instruments).
  • SPK-8615-A Bluetooth 4.0 Mono Audio Module with CSR8615.
  • XS-3868 Stereo Bluetooth Module with Omnivision OVC3860.
  • 1Hz-50MHz Frequency Meter Kit (7 segment LED display).
  • LED POV Rotating Electronic Kit.
  • Macro 58mm Filter Close Up Lens Set For Nikon D3000 D3100.
  • 0.36 Inch Digital Voltmeter 0 – 200V 7-segment LED.
  • SMA male to BNC male coaxial pigtail RG58.
  • BR-2/3A Panasonic Lithium Battery.

Voltlog #11 – InTheMail ICR18650-26F NCR18650B Mifare RC522 RFID Xiaomi 5000mAh

Another VoltLog InTheMail, this time I receive the following items:

  • ICR18650-26F 2600mAh 3.6V Rechargeable Li-ion Battery.
  • NCR18650B 3400mAh 3.7V Rechargeable Li-ion Battery.
  • 3S JST connector cable.
  • DC-DC 0.9V-5V USB Output Charger Step Up Power Module.
  • ESD Anti-Static Shielding ZIP LOCK Bags.
  • Mifare RC522 RFID Induction Reader Module.
  • 100 Pcs 0805 SMD LED Diode 5 Colors.
  • Original Xiaomi 5000mAh Ultra-thin 9.9mm Power Bank.
  • TI Precision Amplifier Quickstart Kit AMPQUICKKIT-EVM
    OPA313, OPA314, OPA316, OPA170, OPA171, OPA172.