This circuit generates a strong audio tone that scares away mosquitoes. Care must be taken that, due to its potency, it can also cause discomfort to very close people and domestic animals.
This VCO or Voltage Controlled Oscillator uses an 8038 integrated circuit that is not very easy to...
This circuit was obtained in a 1978 publication, but it can be assembled with equivalent...
This circuit serves to reinforce the AM band signals for receivers that use an external antenna. The...