In conventional optoelectronics, the response of devices is largely limited by the intrinsic electronic properties of semiconducting devices, such as, the charge carrier lifetime and mobility of materials, and the applied DC or AC electric fields. In lightwave-driven optoelectronics, charge carrier motions in solids can be generated and steered at petahertz frequencies (1 PHz=10^15 Hz) by the fast oscillating electric field of an ultrashort laser pulse. Such operation bandwidth goes far beyond conventional optoelectronic technologies operating at below 100 GHz. Stable, and controllable electric field waveforms of ultrashort light pulses, which we aim to characterize with FIELDTECH, are a prerequisite for the development of petahertz optoelectronics. To overcome limitations of technology currently on the market, our objective is the development of simple, fast, and low-cost technology for the temporal characterization of optical fields. We aim at a small and user-friendly field characterization device that is robust with respect to long-term drifts of the laser source parameters. By optimizing the single-shot detection sensitivity and spectral bandwidth we will facilitate its application to high repetition rate laser sources of 100 kHz and beyond.