Matt circuit

This is a simple colpitts clapp 1 to 20Mhz crystal oscillator circuit diagram. The majority of modern crystal oscillator circuits fall into one of two design categories, the Colpitts Clapp oscillator and the Pierce oscillator. This simpie Colpitis crystal oscillator for 1 to 20 MHz, can be easily made from junk-box parts Colpitts Clapp 1 To 20Mhz Crystal Oscillator Circuit Diagram

How to build a Crystal-controlled-reflection-oscillator circuit diagram . This is a simple crystal controlled reflection oscillator circuit, this unit is easily tunable and stable, consumes little power, and costs less than other types of oscillators tlmt operate at the same frequencies. This unusual combination of features is made possible by a design concept that includes operation of the transistor well beyond the 3 dB frequency of its current-versus- frequency curve.   Crystal Controlled Reflection Oscillator Circuit Diagram The concept takes advantage of newly available crystals that resonate at frequencies up to about 1 GHz.The emitter of transistor Q is connected with variable capacitor Cl and series-resonant crystal X. The emitter is also connected to ground through bias resistor Rl. The base is connected to the parallel combination of inductor L and capacitor C3 through DE-blocking capacitor and C4 and is forward biased with respect to the emitter by resistors R3 and...

Crystal Radio Audio Amplifier Circuit Here is a simple audio amplifier application a TL431 blow regulator. The amplifier will accommodate room-filling aggregate from an accustomed clear radio outfitted with a long-wire antenna and acceptable ground. The chip is agnate in complication to a simple one-transistor radio but the achievement is far superior. The TL431 is accessible in a TO-92 amalgamation and it looks like an accustomed transistor so your hobbyist accompany will be afflicted by the aggregate you are accepting with alone one transistor! The amplifier may be acclimated for added projects, too. Higher impedance headphones and speakers may additionally be used. An earphone from an old blast will accord boisterous aggregate and abundant sensitivity! The 68 ohm resistor may be added to several hundred ohms back application aerial impedance earphones to save array power.

Well the time has come to pour the clear casting resin .I have say I have been putting this off for some time ,but it all turned out well in the end as you can see below :) [ ]