This design utilizes the way capacitor in series and coils in parallel are added up to get the total capacitance and inductance
1 / (1/x1 + 1/x2 + ... +1/xn), to counter the nonlinear function for the resonance frequency of an LC circuit
1 / ( sqrt(L*C) * 2*pi ).
This enables the 4 pairs of switches, each "enabling" or "disabling" a pair consisting of a capacitor and an inductor, to be controlled in a binary pattern, where one bit corresponds to a fixed change in frequency.
* The step size in this configuration is 100kHz.
* The span is 100kHz - 1.6MHz.
* The formula for the frequncy is: 100kHz + bin_val * 100 kHz
* The binary value is shown in the display.
Use up/down/reset bottons to change frequency.
My other designs:
Colpitts Oscillators
http://everycircuit.com/circuit/6472095956729856
LC Filter Bank Oscillator
http://everycircuit.com/circuit/6141020952854528
RF Up and Down Mixing
http://everycircuit.com/circuit/6321309163454464
DC Motor Rev. Sliding Mode Controller
http://everycircuit.com/circuit/5398415189213184
DC Motor Revolution Detector
http://everycircuit.com/circuit/6753368923176960
Amplitude Modulation and Demodulation
http://everycircuit.com/circuit/5510207106187264
Boost SMPS Unlimited Voltage Build Up
http://everycircuit.com/circuit/6448454909034496
High Power Charge Pump w. Mosfets
http://everycircuit.com/circuit/5016778832084992
Transformerless 230 Vac to 10 Vdc
http://everycircuit.com/circuit/4981362800197632
Motor Revolution Controller
http://everycircuit.com/circuit/6424781689978880
Motor Current Sliding Mode Controller
http://everycircuit.com/circuit/5502940846751744
ΣΔ ADC w. Result Displayed
http://everycircuit.com/circuit/4549196269223936
300W Class D Amplifier w. Mosfet output
http://everycircuit.com/circuit/5452375043342336
Three Phase Star Δ Safe Relay Wiring
http://everycircuit.com/circuit/4748634531037184
Accidental 555 High Voltage Generator LOL
http://everycircuit.com/circuit/5057154477457408
