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TV transmitter VHF Bands I, II, or band III

This TV transmitter will handle frequencies up to about 250MHz, so it will work perfectly if you have on your telly. In principle, the transmitter should work up to 500MHz or more, using the BF959 bipolar transistor. You should be able to generate a signal on UHF channel 21, but I have not (yet) tried […]

Electronic Circuits, Schematics, Hobby kits, Custom Electronics design free working Electronic Circuits AF Radio FM reciver with TBA120 – CA3089 – CA3189 -BC547

Electronic Circuits, Schematics, Hobby kits, Custom Electronics design free working Electronic Circuits AF Radio FM reciver with TBA120 – CA3089 – CA3189 -BC547

Tone control circuit

Tone control circuit using TL084 Tone control circuit using TL084 Tone control circuit R1,1′,3,3′,18 …………. 4K7 R2,2′,5,5′ ……………. 1K2 R4,4′ ………………… 1M R16,17 ……………….. 100 R6,6′ ………………… 15K R7,7′,15,15′ ………….. 220 R8,8′,9,9′,12,12′,13,13′ .. 10K R10,10′,11,11′,14,14′ ….. 22K VR1 ………………….. A50K x 2 CT VR2,3,4,5 …………….. B100K x 2 C1,1′ ………………… 470pF C2,2′ ………………… 100nF C3,3′,5,5′,10,10′ […]

Making Micro controller Circuit remote cars

PCB circuit diagrams Motor control and motor drive for remote cars Making Micro controller Circuit remote cars Circuit consists of WZ-X01 RF module, Holtek HT-640 encoder and 8-bit A/D converter. U1 ADC0804 converts the analog voltage to digital data; U2 encodes that data (D0~D6) along with D6, D7 and transmitting through the RF transmitter module. […]

Simple electronic audio communication

Simple electronic audio communication simple intercom system schematic Audio communication Principles of equipment for communication with electronic audio devices, and this is the principle means of electronic communication cables Simple electronic audio communication

Cell voltage converter circuit

Cell voltage converter using ZSCT15555, BAS16, FMMT3906, ZHCS750

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