Build 20W Integrated Amplifier with tone control
This is small integrated amplifier at 20W using a TDA2004 or TDA2005 IC,use 12V supply for BCL car audio amps[...]
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November 20, 2018
Multiples ways to increase current transformer of power supply
To increase current transformer on the power supply. To save money with this idea, just only change connecting of on original transformer windings.
November 19, 2018
Separate each rectifier diodes into parallel
Simple Crystal oscillator Circuit using 74LS04
This Simple Crystal oscillator Circuit using 74LS04 that provided square wave of 1MHz to 10MHz, Use inverter gate IC and control frequencies with crystal [...]
November 17, 2018
Simple crystal oscillator 1-10MHz using inverter gate
Simple video amplifier circuit
This is Simple video amplifier circuit using LM359. That use a op-amp IC number: LM395 or similar, which can work in high frequency such as LM3900 series [...]
November 17, 2018
simple video amplifier circuit using LM359
DIY Cheap Resistance Decade Circuit
Here is a DIY resistance decade tool for testing and calibration. Because it can substitute into a circuit with all standard value. This ideal is cheapest that use resistors and wires only.…
November 13, 2018
DIY Cheap Resistance Decade Circuit
Small Zener diode voltage regulator circuit with PCB
Small Zener diode voltage regulator circuit with PCB, using transistor and few parts. it is simple and cheap fixed dc source circuit. As one of best choice.
November 13, 2018
The light meter circuit using a general diode
Simple light meter circuit idea using normal diode as sensor, amount of light by voltmeter. Using op-amp-CA3140 and a few parts.
November 6, 2018
Complete Light meter circuit idea using diode