RF Power Amplifier for QRP with low cost. This circuit is a broadband one from 1.8 to 30 MHz, so it is “no-tune” and you need only to regulate the quiescent current bias multiturn trimmer of each Mosfets couple. This means also low efficiency (for a lower IMD it is even low as around 20-30%) [...]
2n3904+circuits+led
Device selection by 3-8 decoder At this circuit, the selection of seven devices are done using the decoder(74HC138). Device number Device 0 BCD-SW for 10th of the minute 1 BCD-SW for 1st of the minute 2 Start switch 3 Unused 4 7 segment LED for 10th of minute 5 7 segment LED for 1st of [...]
Portable and small unit, Can be built on a veroboard Firstly, I’d like to stress that the intended use of this circuit is only one of many possible applications. Apart from the obvious usage as a headphone amplifier, the circuit can be used for a range of applications where a wide bandwidth low power amplifier [...]
Small in size! Big in use Here is a simple and powerful LED circuit that can be operated directly from the AC 100 volt to AC 230 Volts mains supply. The circuit can be used as mains power locator or night lamp etc.. The resistor R1,R2 and capacitor C1 provides necessary current limiting. The circuit [...]
Line 6 Digital Wireless Systems XDS-PLUS Pro Power to Go – Metal Chassis Stompbox Digital UHF Wireless. The XDS-PLUS is a rugged digital instrument wireless system sporting many features of the XDR Series packed into a metal chassis stompbox receiver. The result: extended frequency response and extended operating range that only a Line 6 can [...]
