TV test pattern generator circuit with wireless
The TV test pattern generator circuit with wireless model. To assemble circuit easy, can transmit signal in wireless to video and audio As horizontal line. Read more
Meters & Detectors
2 Crystal tester circuits with PCB
This is Crystal tester circuit using NPN transistors as main. LED1 is light up when a crystal is good and simple oscillator circuit works. Read more
KA2284 Stereo audio level indicator
Here is cheap Stereo audio vu meter circuit with PCB. using KA2284 x2 and 10 LED or 5 LEDs per channel, it is simple to builds and few parts. put projects Read more
Simple Moisture Meter using 2N2222
This simple moisture meter circuit uses for level moistness temple of the earth. Fine the value R2 give Meter read the value has 1mA. When the moistness […] Read more
8 Low Battery Voltage Alarm indicator circuits
Why your circuit does not work? Because the battery is run out. These low voltage indicator circuits may helpful for you. If you can know before and change a new one right now. It makes you not have to waste time when using those projects. Read more