Resistor color code

A resistor is the most important electrical component in almost every electronic circuit, it can limit current to any load such as led, transistor, opamp, etc. We must read resistor color code if we want to know the resistive value, tolerance, temperature coefficient. Resistors have different color bands (3,4,5,6) the more color bands the more resistor's information.Now let's start with 3 bands resistor color code.

The above resistor has only 3 bands First digit, Second digit, and multiply. A 3 bands resistor color code has fixed +/-20% tolerance that means if color code value is 1,000 ohms the real life resistive value may be +/- 200 ohms. 
4 band resistor color code

A 4 bands resistor color code has tolerance value color strip, the resistor on an above picture has 5% tolerance. This type of resistor uses in a regular circuit such as television,radio,washing machine.

5 bands resistor color code

A 5 bands resistor color codes have third digit color bands.
1(first digit) 0(second dig…

15 watts stereo class T amplifier TA2024 sound test and review

TA 2024 is low cost15 watts class T amplifier (I got it from eBay for 4.94$ free shipping). The amplifier board uses MKP film as input capacitor that hard to find in cheap board amplifier from eBay.

The amplifier sound very clean and details and loud with high sensitivity loudspeaker (89 dB or better), bass not big but control well.
However, high frequencies tend to roll off a little bit but still good.

The TAta2024 amp is good with Jazz, pop, guitar solo, saxophone, and smooth jazz in my opinion.

If you use switching power supply you need to add at least 2200 uf capacitor parallel to the power supply for best performance.

TA 2024 specification:

Class-T architecture
 Single Supply Operation
 “Audiophile” Quality Sound
 0.04% THD+N @ 9W, 4Ω
 0.18% IHF-IM @ 1W, 4Ω
 11W @ 4Ω, 0.1% THD+N
 6W @ 8Ω, 0.1% THD+N
 15W @ 4Ω, 10% THD+N
 10W @ 8Ω, 10% THD+N
 High Efficiency
 81% @ 15W, 4Ω
 88% @ 10W, 8Ω
 Dynamic Range = 102 dB
 Mute and Sleep inputs
 Turn-on & turn-off pop suppression
 Over-current protection
 Over-temperature protection
 Bridged outputs
 36-pin Power SOP package

Sound testing video:

The video record with Olympus e-pm2 camera built-in stereo mic and video record @1080p

See how to connect volume control to an amplifier board here

See how to add a power supply filter capacitor to TA2024 amp board to improve overall sound quality here


  1. Car stereo system is present in all the cars that come out of the manufacturer's hub, so there is nothing special in having a standard stereo system, but should have a really upgraded stereo system.


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