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This final project makes a device that produces electrical energy by utilizing waste heat from injection machines. The waste heat of the injection machine is converted into electrical energy using a thermoelectric. This device consists of an aluminum heatsink, aluminum plate, thermoelectric, MDF wood planks, engine gasket, and thermal paste. The heat generated by the injection machine is received by the hot side heatsink, then 4 units of the thermoelectric and the cold side heatsink. Thermoelectrics are arranged in series. The output from the thermoelectric is connected to a multimeter to test the amount of voltage and current generated. The number of thermoelectric-based equipment made of 2 (two) pieces and assembled in series. The test was carried out using an open circuit and a closed circuit with a load using a 1 watt LED lamp (Ω 55 Ω). The open circuit test results show that the largest voltage is generated at 10.80 volts with a hot side temperature of 108C and a cold side temperature of 64˚C. The results of the closed circuit test show that the greatest voltage produced is 2.64 volts with a hot side temperature of 108 C and a cold side temperature of 62 C. When thermoelectric based equipment is given a load, the voltage decreases because the voltage is divided into the given load. This equipment can be applied to turn on as many as 5 lamps with a power of 1 watt each which supports production activities in the injection workshop.

– The Natural dye of Jambal wood (Pelthophorumferugineum) was used as sensitizer in the fabrication of dye sensitizer solar cell (DSSC). The dye was extracted by using solid-liquid extraction method with ethanol as a solvent. UV-Vis spectrophotometer was used to measure the absorbance of dye solution. TiO 2 thin-layer was prepared by slip coating method which the pH 5 suspension of TiO 2 Degussa on HCl deposited on a glass substrate Fluorine-doped Tin Oxide (FTO).Dye adsorption was done by the immersion TiO 2 thin layer in the dye solution in ethanol for 24 hours after calcination, then used as the working electrode. Counter electrode was prepared by the deposition of gold on the glass substrate.The performance of solar cells sensitized of natural Jambal wood dye was investigated through the measurements of I sc (short circuit currents) and V oc (open circuit voltage on) during irradiation with sun simulated Philips Powertone lamp. The measurement results showed that the solar cell has I sc and V oc by 56 ηA/cm 2 and 394 mV respectively. Keywords– Fotoelektrokimia, Dye Sensitized Solar Cell, zatwarnaalam, Jambal.